Jia Huo - Academia.edu (original) (raw)
Papers by Jia Huo
Archives of Dermatological Research, 2010
Dyschromatosis symmetrica hereditaria (DSH) is a hereditary skin disease characterized by the pre... more Dyschromatosis symmetrica hereditaria (DSH) is a hereditary skin disease characterized by the presence of hyperpigmented and hypopigmented macules on face and dorsal aspects of the extremities that appear in infancy or early childhood. Genetic studies have identiWed mutations in the double-stranded RNA-speciWc adenosine deaminase (DSRAD) gene, encoding double-stranded RNA-speciWc adenosine deaminase, to be responsible for this disorder. Here, we report two novel mutations c.2116 G > A (E706K) and c.2848 C > T (Q950X) in the DSRAD gene identiWed in two Chinese pedigrees with DSH. This study should be useful for genetic counseling and prenatal diagnosis for aVected families and in expanding the database on DSRAD gene mutations in DSH.
International Journal of Dermatology, 2010
reactive oxygen species, calcium imbalance, or what else? Exp Dermatol 2008; 17: 139-40; discussi... more reactive oxygen species, calcium imbalance, or what else? Exp Dermatol 2008; 17: 139-40; discussion 41-60. 3 Schallreuter KU, Kruger C, Wurfel BA, et al. From basic research to the bedside: efficacy of topical treatment with pseudocatalase PC-KUS in 71 children with vitiligo. Int J Dermatol 2008; 47: 743-53. 4 Schallreuter KU, Rokos H. Vitix -a new treatment for vitiligo? Int J Dermatol 2005; 44: 969-70.
Journal of Applied Polymer Science, 2008
A novel ferrocene-based epoxy compound of glycidyl ester of 1,1′-ferrocene dicarboxylate was synt... more A novel ferrocene-based epoxy compound of glycidyl ester of 1,1′-ferrocene dicarboxylate was synthesized by the reaction of 1,1′-ferrocene dicarboxylate and epichlorohydrin. The resultant epoxy compound showed an irreversible redox process in cyclic voltammetry (CV) measurement. The curing behavior of glycidyl ester of 1,1′-ferrocene dicarboxylate and dicyandiamide system was investigated by nonisothermal measurement using the Ozawa's approach with the heating rate of 5, 10, 15, and 20°C/min, respectively. It was found that both the diffusion of the compound and the curing temperature have effect on the curing process, and the effect of temperature was greater. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Journal of Physical Chemistry B, 2008
The electrochemical behaviors of hyperbranched poly(ferrocenyl-methylsilane) (HPFMS) and linear o... more The electrochemical behaviors of hyperbranched poly(ferrocenyl-methylsilane) (HPFMS) and linear oligo-(ferrocenyldimethylsilane) (LOFS) films were studied systematically by cyclic voltammetry and chronocoulometry under different polymer coverage and solvents. Both poly(ferrocenylsilanes) show stable cyclic voltammographs in LiClO 4 solutions. Compared with LOFS films, HPFMS films exhibit higher charge transport efficiency because of their hyperbranched structure: peak current (i p ) and apparent diffusion coefficient (D app ) for HPFMS films are larger than those for LOFS films, especially at high polymer coverage (3.8 × 10 -11 vs 3.9 × 10 -12 cm 2 /s for HPFMS and LOFS film at the coverage of 2.1 × 10 -6 mol Fc/cm 2 ). The conceptual models of electrode processes for HPFMS and LOFS films were proposed to account for higher charge transport efficiency of HPFMS films. It is also found that a solvent with the appropriate solubility parameter and polarity, lower viscosity, and higher dielectric constant is in favor of charge transport through polymer films, which is consistent with the proposed model of electrode process for HPFMS films. These results imply that hyperbranched ferrocenyl polymers have the potential to be excellent chemical sensor materials with convenient synthesis and high sensitivity.
Designed Monomers and Polymers, 2009
Designed Monomers and Polymers provides a forum for the prompt publication of peer-reviewed, Engl... more Designed Monomers and Polymers provides a forum for the prompt publication of peer-reviewed, English-language papers on all areas of macromolecular design and application. Emphasis will be placed on the macromolecular preparations including the synthesis, characterization and application of monomers. The experimental part should be provided in such detail (including specific observations, precautionary notes, use of new materials, techniques and their possible problems, etc.) that it could be reproduced by any researcher wishing to repeat the work. The subjects of supramolecular science, initiators, macroinitiators for macromolecular design, as well as the kinetics, mechanism and modeling aspects of polymerization, will be included too. This journal will provide an interface between organic and polymer chemistries and aims to bridge the gap between monomer synthesis and the design of new polymers. The subject of monomers may include old monomers but new methods of synthesis. Author(s) must show the evidence for polymerization (including polycondensation, sequential combination, oxidative coupling, radiation, plasma polymerization, etc.) for new monomers. The field of monomers encompasses functional prepolymers of various architecture, such as hyperbranched polymers, telechelic polymers, macromonomers, or dendrimers. In particular, articles on monomers have been scattered over a vast number of journals: there is no polymer journal that covers a specialized subject such as monomers, whereas monomers are the building blocks of polymers. Designed Monomers and Polymers seeks to redress the balance by providing an international forum for addressing the issue of monomers and the art and science of macromolecular design. Issues will contain: review articles of topical areas, full research papers, short research papers, book reviews, conference reports, and conferences of note.
Journal of Physical Chemistry B, 2008
Novel N,N&amp... more Novel N,N'-bisethoxyethane[12]amideferrocenophane has been synthesized by a condensation reaction and characterized by (1)H NMR and mass spectrum. The anion recognition properties of the compound are evaluated via (1)H NMR, FT-IR, and electrochemical measurement. It is found that N,N'-bisethoxyethane[12]amideferrocenophane exhibits remarkable electrochemical response to H(2)PO(4-) anion in CH(2)C(l2) or CH(3)CN solution, and response to anions can also be observed in CH(3)CN solution containing up to 15% water. Binding constants between the compound and HSO(4-) in different solutions have been determined by UV-vis spectrum titration experiments. The results indicate that the compound shows a selective recognition trend of H(2)PO(4-) > HSO(4-) (F(-)) > Br(-).
Macromolecules, 2009
A novel linear−hyperbranched multiblock polyethylene was prepared from ethylene monomer alone via... more A novel linear−hyperbranched multiblock polyethylene was prepared from ethylene monomer alone via chain walking and chain shuttling polymerization in the presence of chain transfer agent (ZnEt 2 ). In the binary catalyst system, α-diimine nickel(II) bromide complex (CatA) ...
Journal of Colloid and Interface Science
We report the chemical synthesis route, structural characterization, and physical properties of n... more We report the chemical synthesis route, structural characterization, and physical properties of nanofluid magnetic graphite (NFMG) obtained from the previously synthesized bulk organic magnetic graphite (MG) by stabilizing the aqueous ferrofluid suspension with an addition of active cationic surfactant. The measured magnetizationfield hysteresis curves along with the temperature dependence of magnetization confirmed room-temperature ferromagnetism in both MG and NFMG samples.
Journal of Materials Science, 2009
The need for protecting human or devices from harm and for keeping something from being detected ... more The need for protecting human or devices from harm and for keeping something from being detected by other instruments is spawning a world of attention in the development of novel electromagnetic (EM) wave absorption materials. An ideal EM wave absorber is necessary to have light weight, thin thickness, high EM wave absorption, broad width, tunable absorption frequency, and multi-functionality. This article introduces the EM wave absorption mechanism and reviews the development of polymer-based nanocomposites for EM wave absorption, in which polymers act as absorbing components or/and matrixes. And we also summarize the approaches to design the ideal absorber, including introduction of nanostructure, and simultaneous action of both dielectric and magnetic materials with special structure by directly mixing, core–shell or multilayer structure.
Electrochimica Acta, 2009
Two novel ferrocene-based compounds glycidyl ester of ferrocene carboxylate (GEFC) and 1,3diferro... more Two novel ferrocene-based compounds glycidyl ester of ferrocene carboxylate (GEFC) and 1,3diferrocenecarboxylic acid diacylglycerol (DFCDG) were synthesized and characterized by 1 H NMR and mass spectrum. The influence of some factors, namely, solvent type, potential scan rate, electrolyte concentration and [Fe] unit concentration, on the electrochemical behaviors of two novel ferrocene-based compounds was investigated, and the mechanism of the electrode processes was studied. Finally, two compounds were applied to sense the H 2 PO 4 − by cyclic voltammetry (CV) method and it was found that the DFCDG with a symmetric structure which was synthesized through ring opening reaction of ferrocene carboxylate and GEFC showed stronger interaction with the H 2 PO 4 − than GEFC.
Journal of Physical Chemistry C, 2009
Journal of Polymer Science Part B-polymer Physics, 2008
Carbon black nanoparticle grafted with poly(N-isopropylacrylamide) (CB-g-PNIPAAm) was synthesized... more Carbon black nanoparticle grafted with poly(N-isopropylacrylamide) (CB-g-PNIPAAm) was synthesized by surface-initiated atom transfer radical polymerization (SI-ATRP). The temperature-responsive behavior of CB-g-PNIPAAm was proved by temperature-variable 1H NMR. A temperature-dependent conductive composite was prepared by blending CB-g-PNIPAAm with epoxy resin. The relationship between temperature and resistivity of the composite was studied: the composite exhibited a negative temperature coefficient (NTC) phenomenon. Possible mechanism for the NTC phenomenon was suggested. The results showed that resultant composites can be used in intelligent temperature-switching. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 1529–1535, 2008
Branched polymers containing ferrocene have attracted much attention due to their redox and magne... more Branched polymers containing ferrocene have attracted much attention due to their redox and magnetic characteristics, among others. The recent research progress in synthetic methods of branched ferrocene-based polymers, as well as their properties and applications in supramolecular recognition and as precursors of magnetic materials, are reviewed in this paper.
Journal of Physical Chemistry B, 2009
A novel ferrocene-based amide has been synthesized by condensation reaction and characterized by ... more A novel ferrocene-based amide has been synthesized by condensation reaction and characterized by (1)H NMR and UV-vis spectroscopies. The electrochemical properties and anion recognition properties of the ferrocene-based amide were investigated by the CV and UV-vis techniques. An interesting phenomenon was revealed by CV: a second oxidative peak, and the first oxidative peak decreased. Therefore, an effective dihydrogen phosphate recognition sensor is expected from this compound in the future.
Designed Monomers and Polymers, 2009
A novel ferrocene-based epoxy compound of the glycidyl ether of poly(bisphenol-A 1,1′-ferrocene d... more A novel ferrocene-based epoxy compound of the glycidyl ether of poly(bisphenol-A 1,1′-ferrocene dicarboxylate) (GEPBFC) was synthesized and the electrochemical behavior of its films and solutions was investigated by cyclic voltammetry (CV). It was found that the GEPBFC films and solutions present different CV behavior in different solvents and the swelling ability of the solvent is the main factor that affects
Chinese Physics C, 2010
The Low Energy X-ray Instrument (LE) of the Hard X-ray Modulation Telescope (HXMT) uses the Swept... more The Low Energy X-ray Instrument (LE) of the Hard X-ray Modulation Telescope (HXMT) uses the Swept Charge Device (SCD) to detect the X-rays in 1-15 keV. The performance of SCD is vulnerable to temperature. We analyzed the thermal condition of LE at different satellite working attitudes with the Finite Element Method (FEM). It is shown that the angle between the sunlight and the normal line of the barrier should be less than 26°, to keep the SCD detectors working in the required temperature range, i.e. -40 °C to -80 °C. We find that the performance of LE is very stable in this temperature range, with a typical energy resolution of 160 eV at 5.9 keV.
Journal of Hazardous Materials, 2010
Porous magnetic microspheres with large particle size (350-450 m) were prepared with sulfonated m... more Porous magnetic microspheres with large particle size (350-450 m) were prepared with sulfonated macroporous polydivinylbenzene as a template. The preparation process included ferrous ion exchange and following oxidation by hydrogen peroxide. The results showed that the weight fraction of magnetic nanoparticles exceeded 20 wt% in microspheres after the preparation process was repeated three times. X-ray diffraction profiles indicated that the crystalline phase of as-formed magnetic nanoparticles was magnetite (Fe 3 O 4 ). TEM images revealed rod-like magnetite crystal after the first oxidation cycle, however, the crystal morphologies were transferred into random shape after more oxidation cycles. The applicability of porous magnetic microspheres for removal of cationic dyes from water was also explored. The results exhibited that basic fuchsin and methyl violet could be quickly removed from water with high efficiency. More importantly, the magnetic microspheres could be easily regenerated and repeatedly employed for wastewater treatment. Therefore, a novel methodology was provided for fast removal cationic dyes from wastewater.
Polymer-plastics Technology and Engineering, 2010
Polyphosphazenes elastomers have major utilization as fire resistant materials, gas kits, O-rings... more Polyphosphazenes elastomers have major utilization as fire resistant materials, gas kits, O-rings, electrical insulation, oil-resistant hoses, foam, ceramics, especially helicopter, air craft, aerospace, military and navy hardware applications. Tremendous achievements have been obtained for the synthesis and applications of polyphosphazenes. In this review, we highlighted the types, synthesis, characterization and applications of polyphosphazenes elastomers.
Materials Letters, 2007
Ethylene polymerization was carried out with multiwalled carbon nanotubes (MWCNTs)-supported Cp2Z... more Ethylene polymerization was carried out with multiwalled carbon nanotubes (MWCNTs)-supported Cp2ZrCl2 catalyst. Because of the catalyst pretreated on the surface of the MWNTs, the ethylene was expected to polymerize there. The influences of polymerization temperature and Al/Zr molar ratios on the morphologies of the resultant polyethylene were systematically investigated with SEM. The nano-polyethylene fibres were obtained owing to the fibres of original MWNTs were covered by polyethylene. The diameters of the nano-fibres were 80–130 nm. With the increase of reaction temperature, the “over load” of polyethylene on the surface of CNTs made the polyethylene fibres disappear.
Journal of Polymer Science Part B-polymer Physics, 2007
Linear oligo(ferrocenylsilane) and hyperbranched poly(ferrocenylsilane) (LOFS and HPFS) were synt... more Linear oligo(ferrocenylsilane) and hyperbranched poly(ferrocenylsilane) (LOFS and HPFS) were synthesized by polycondensation of 1,1′-dilithioferrocene (FcLi2) with dimethyldichlorosilane (Me2SiCl2) and FcLi2 with methyltrichlorosilane (MeSiCl3) in THF under different conditions, respectively. The electrochemical behaviors of LOFS and HPFS in different solvents, such as THF, CH2Cl2, and CHCl3, were investigated systematically by means of cyclic voltammetry (CV). The influences of the solvent, structure of polymer, and scan rate on electrochemical behavior of poly(ferrocenylsilane) solutions are discussed. It is found that ΔE1/2 decreases with the fall of solvent polarity apart from the solvent donor effect and increases with the increase of the acceptor number (AN) of the solvent. More interestingly, the structure of polymer imposes greatly on the interaction between ferrocene units. According to the result, the mechanism of stepwise oxidation of the ferrocene units was proposed, that is, the different conformations of polymers, attaching to electrode surface, before and after oxidized resulted in the stepwise oxidation of ferrocene groups along a chain. Kinetic parameters from CVs indicate that the electrode processes are controlled by both the electrode reaction and mass diffusion and the electrochemical irreversibility of poly(ferrocenylsilane) solutions may be ascribed to the lower electron exchange efficiency on the electrode surface. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2880–2889, 2007
Archives of Dermatological Research, 2010
Dyschromatosis symmetrica hereditaria (DSH) is a hereditary skin disease characterized by the pre... more Dyschromatosis symmetrica hereditaria (DSH) is a hereditary skin disease characterized by the presence of hyperpigmented and hypopigmented macules on face and dorsal aspects of the extremities that appear in infancy or early childhood. Genetic studies have identiWed mutations in the double-stranded RNA-speciWc adenosine deaminase (DSRAD) gene, encoding double-stranded RNA-speciWc adenosine deaminase, to be responsible for this disorder. Here, we report two novel mutations c.2116 G > A (E706K) and c.2848 C > T (Q950X) in the DSRAD gene identiWed in two Chinese pedigrees with DSH. This study should be useful for genetic counseling and prenatal diagnosis for aVected families and in expanding the database on DSRAD gene mutations in DSH.
International Journal of Dermatology, 2010
reactive oxygen species, calcium imbalance, or what else? Exp Dermatol 2008; 17: 139-40; discussi... more reactive oxygen species, calcium imbalance, or what else? Exp Dermatol 2008; 17: 139-40; discussion 41-60. 3 Schallreuter KU, Kruger C, Wurfel BA, et al. From basic research to the bedside: efficacy of topical treatment with pseudocatalase PC-KUS in 71 children with vitiligo. Int J Dermatol 2008; 47: 743-53. 4 Schallreuter KU, Rokos H. Vitix -a new treatment for vitiligo? Int J Dermatol 2005; 44: 969-70.
Journal of Applied Polymer Science, 2008
A novel ferrocene-based epoxy compound of glycidyl ester of 1,1′-ferrocene dicarboxylate was synt... more A novel ferrocene-based epoxy compound of glycidyl ester of 1,1′-ferrocene dicarboxylate was synthesized by the reaction of 1,1′-ferrocene dicarboxylate and epichlorohydrin. The resultant epoxy compound showed an irreversible redox process in cyclic voltammetry (CV) measurement. The curing behavior of glycidyl ester of 1,1′-ferrocene dicarboxylate and dicyandiamide system was investigated by nonisothermal measurement using the Ozawa's approach with the heating rate of 5, 10, 15, and 20°C/min, respectively. It was found that both the diffusion of the compound and the curing temperature have effect on the curing process, and the effect of temperature was greater. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Journal of Physical Chemistry B, 2008
The electrochemical behaviors of hyperbranched poly(ferrocenyl-methylsilane) (HPFMS) and linear o... more The electrochemical behaviors of hyperbranched poly(ferrocenyl-methylsilane) (HPFMS) and linear oligo-(ferrocenyldimethylsilane) (LOFS) films were studied systematically by cyclic voltammetry and chronocoulometry under different polymer coverage and solvents. Both poly(ferrocenylsilanes) show stable cyclic voltammographs in LiClO 4 solutions. Compared with LOFS films, HPFMS films exhibit higher charge transport efficiency because of their hyperbranched structure: peak current (i p ) and apparent diffusion coefficient (D app ) for HPFMS films are larger than those for LOFS films, especially at high polymer coverage (3.8 × 10 -11 vs 3.9 × 10 -12 cm 2 /s for HPFMS and LOFS film at the coverage of 2.1 × 10 -6 mol Fc/cm 2 ). The conceptual models of electrode processes for HPFMS and LOFS films were proposed to account for higher charge transport efficiency of HPFMS films. It is also found that a solvent with the appropriate solubility parameter and polarity, lower viscosity, and higher dielectric constant is in favor of charge transport through polymer films, which is consistent with the proposed model of electrode process for HPFMS films. These results imply that hyperbranched ferrocenyl polymers have the potential to be excellent chemical sensor materials with convenient synthesis and high sensitivity.
Designed Monomers and Polymers, 2009
Designed Monomers and Polymers provides a forum for the prompt publication of peer-reviewed, Engl... more Designed Monomers and Polymers provides a forum for the prompt publication of peer-reviewed, English-language papers on all areas of macromolecular design and application. Emphasis will be placed on the macromolecular preparations including the synthesis, characterization and application of monomers. The experimental part should be provided in such detail (including specific observations, precautionary notes, use of new materials, techniques and their possible problems, etc.) that it could be reproduced by any researcher wishing to repeat the work. The subjects of supramolecular science, initiators, macroinitiators for macromolecular design, as well as the kinetics, mechanism and modeling aspects of polymerization, will be included too. This journal will provide an interface between organic and polymer chemistries and aims to bridge the gap between monomer synthesis and the design of new polymers. The subject of monomers may include old monomers but new methods of synthesis. Author(s) must show the evidence for polymerization (including polycondensation, sequential combination, oxidative coupling, radiation, plasma polymerization, etc.) for new monomers. The field of monomers encompasses functional prepolymers of various architecture, such as hyperbranched polymers, telechelic polymers, macromonomers, or dendrimers. In particular, articles on monomers have been scattered over a vast number of journals: there is no polymer journal that covers a specialized subject such as monomers, whereas monomers are the building blocks of polymers. Designed Monomers and Polymers seeks to redress the balance by providing an international forum for addressing the issue of monomers and the art and science of macromolecular design. Issues will contain: review articles of topical areas, full research papers, short research papers, book reviews, conference reports, and conferences of note.
Journal of Physical Chemistry B, 2008
Novel N,N&amp... more Novel N,N'-bisethoxyethane[12]amideferrocenophane has been synthesized by a condensation reaction and characterized by (1)H NMR and mass spectrum. The anion recognition properties of the compound are evaluated via (1)H NMR, FT-IR, and electrochemical measurement. It is found that N,N'-bisethoxyethane[12]amideferrocenophane exhibits remarkable electrochemical response to H(2)PO(4-) anion in CH(2)C(l2) or CH(3)CN solution, and response to anions can also be observed in CH(3)CN solution containing up to 15% water. Binding constants between the compound and HSO(4-) in different solutions have been determined by UV-vis spectrum titration experiments. The results indicate that the compound shows a selective recognition trend of H(2)PO(4-) > HSO(4-) (F(-)) > Br(-).
Macromolecules, 2009
A novel linear−hyperbranched multiblock polyethylene was prepared from ethylene monomer alone via... more A novel linear−hyperbranched multiblock polyethylene was prepared from ethylene monomer alone via chain walking and chain shuttling polymerization in the presence of chain transfer agent (ZnEt 2 ). In the binary catalyst system, α-diimine nickel(II) bromide complex (CatA) ...
Journal of Colloid and Interface Science
We report the chemical synthesis route, structural characterization, and physical properties of n... more We report the chemical synthesis route, structural characterization, and physical properties of nanofluid magnetic graphite (NFMG) obtained from the previously synthesized bulk organic magnetic graphite (MG) by stabilizing the aqueous ferrofluid suspension with an addition of active cationic surfactant. The measured magnetizationfield hysteresis curves along with the temperature dependence of magnetization confirmed room-temperature ferromagnetism in both MG and NFMG samples.
Journal of Materials Science, 2009
The need for protecting human or devices from harm and for keeping something from being detected ... more The need for protecting human or devices from harm and for keeping something from being detected by other instruments is spawning a world of attention in the development of novel electromagnetic (EM) wave absorption materials. An ideal EM wave absorber is necessary to have light weight, thin thickness, high EM wave absorption, broad width, tunable absorption frequency, and multi-functionality. This article introduces the EM wave absorption mechanism and reviews the development of polymer-based nanocomposites for EM wave absorption, in which polymers act as absorbing components or/and matrixes. And we also summarize the approaches to design the ideal absorber, including introduction of nanostructure, and simultaneous action of both dielectric and magnetic materials with special structure by directly mixing, core–shell or multilayer structure.
Electrochimica Acta, 2009
Two novel ferrocene-based compounds glycidyl ester of ferrocene carboxylate (GEFC) and 1,3diferro... more Two novel ferrocene-based compounds glycidyl ester of ferrocene carboxylate (GEFC) and 1,3diferrocenecarboxylic acid diacylglycerol (DFCDG) were synthesized and characterized by 1 H NMR and mass spectrum. The influence of some factors, namely, solvent type, potential scan rate, electrolyte concentration and [Fe] unit concentration, on the electrochemical behaviors of two novel ferrocene-based compounds was investigated, and the mechanism of the electrode processes was studied. Finally, two compounds were applied to sense the H 2 PO 4 − by cyclic voltammetry (CV) method and it was found that the DFCDG with a symmetric structure which was synthesized through ring opening reaction of ferrocene carboxylate and GEFC showed stronger interaction with the H 2 PO 4 − than GEFC.
Journal of Physical Chemistry C, 2009
Journal of Polymer Science Part B-polymer Physics, 2008
Carbon black nanoparticle grafted with poly(N-isopropylacrylamide) (CB-g-PNIPAAm) was synthesized... more Carbon black nanoparticle grafted with poly(N-isopropylacrylamide) (CB-g-PNIPAAm) was synthesized by surface-initiated atom transfer radical polymerization (SI-ATRP). The temperature-responsive behavior of CB-g-PNIPAAm was proved by temperature-variable 1H NMR. A temperature-dependent conductive composite was prepared by blending CB-g-PNIPAAm with epoxy resin. The relationship between temperature and resistivity of the composite was studied: the composite exhibited a negative temperature coefficient (NTC) phenomenon. Possible mechanism for the NTC phenomenon was suggested. The results showed that resultant composites can be used in intelligent temperature-switching. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 1529–1535, 2008
Branched polymers containing ferrocene have attracted much attention due to their redox and magne... more Branched polymers containing ferrocene have attracted much attention due to their redox and magnetic characteristics, among others. The recent research progress in synthetic methods of branched ferrocene-based polymers, as well as their properties and applications in supramolecular recognition and as precursors of magnetic materials, are reviewed in this paper.
Journal of Physical Chemistry B, 2009
A novel ferrocene-based amide has been synthesized by condensation reaction and characterized by ... more A novel ferrocene-based amide has been synthesized by condensation reaction and characterized by (1)H NMR and UV-vis spectroscopies. The electrochemical properties and anion recognition properties of the ferrocene-based amide were investigated by the CV and UV-vis techniques. An interesting phenomenon was revealed by CV: a second oxidative peak, and the first oxidative peak decreased. Therefore, an effective dihydrogen phosphate recognition sensor is expected from this compound in the future.
Designed Monomers and Polymers, 2009
A novel ferrocene-based epoxy compound of the glycidyl ether of poly(bisphenol-A 1,1′-ferrocene d... more A novel ferrocene-based epoxy compound of the glycidyl ether of poly(bisphenol-A 1,1′-ferrocene dicarboxylate) (GEPBFC) was synthesized and the electrochemical behavior of its films and solutions was investigated by cyclic voltammetry (CV). It was found that the GEPBFC films and solutions present different CV behavior in different solvents and the swelling ability of the solvent is the main factor that affects
Chinese Physics C, 2010
The Low Energy X-ray Instrument (LE) of the Hard X-ray Modulation Telescope (HXMT) uses the Swept... more The Low Energy X-ray Instrument (LE) of the Hard X-ray Modulation Telescope (HXMT) uses the Swept Charge Device (SCD) to detect the X-rays in 1-15 keV. The performance of SCD is vulnerable to temperature. We analyzed the thermal condition of LE at different satellite working attitudes with the Finite Element Method (FEM). It is shown that the angle between the sunlight and the normal line of the barrier should be less than 26°, to keep the SCD detectors working in the required temperature range, i.e. -40 °C to -80 °C. We find that the performance of LE is very stable in this temperature range, with a typical energy resolution of 160 eV at 5.9 keV.
Journal of Hazardous Materials, 2010
Porous magnetic microspheres with large particle size (350-450 m) were prepared with sulfonated m... more Porous magnetic microspheres with large particle size (350-450 m) were prepared with sulfonated macroporous polydivinylbenzene as a template. The preparation process included ferrous ion exchange and following oxidation by hydrogen peroxide. The results showed that the weight fraction of magnetic nanoparticles exceeded 20 wt% in microspheres after the preparation process was repeated three times. X-ray diffraction profiles indicated that the crystalline phase of as-formed magnetic nanoparticles was magnetite (Fe 3 O 4 ). TEM images revealed rod-like magnetite crystal after the first oxidation cycle, however, the crystal morphologies were transferred into random shape after more oxidation cycles. The applicability of porous magnetic microspheres for removal of cationic dyes from water was also explored. The results exhibited that basic fuchsin and methyl violet could be quickly removed from water with high efficiency. More importantly, the magnetic microspheres could be easily regenerated and repeatedly employed for wastewater treatment. Therefore, a novel methodology was provided for fast removal cationic dyes from wastewater.
Polymer-plastics Technology and Engineering, 2010
Polyphosphazenes elastomers have major utilization as fire resistant materials, gas kits, O-rings... more Polyphosphazenes elastomers have major utilization as fire resistant materials, gas kits, O-rings, electrical insulation, oil-resistant hoses, foam, ceramics, especially helicopter, air craft, aerospace, military and navy hardware applications. Tremendous achievements have been obtained for the synthesis and applications of polyphosphazenes. In this review, we highlighted the types, synthesis, characterization and applications of polyphosphazenes elastomers.
Materials Letters, 2007
Ethylene polymerization was carried out with multiwalled carbon nanotubes (MWCNTs)-supported Cp2Z... more Ethylene polymerization was carried out with multiwalled carbon nanotubes (MWCNTs)-supported Cp2ZrCl2 catalyst. Because of the catalyst pretreated on the surface of the MWNTs, the ethylene was expected to polymerize there. The influences of polymerization temperature and Al/Zr molar ratios on the morphologies of the resultant polyethylene were systematically investigated with SEM. The nano-polyethylene fibres were obtained owing to the fibres of original MWNTs were covered by polyethylene. The diameters of the nano-fibres were 80–130 nm. With the increase of reaction temperature, the “over load” of polyethylene on the surface of CNTs made the polyethylene fibres disappear.
Journal of Polymer Science Part B-polymer Physics, 2007
Linear oligo(ferrocenylsilane) and hyperbranched poly(ferrocenylsilane) (LOFS and HPFS) were synt... more Linear oligo(ferrocenylsilane) and hyperbranched poly(ferrocenylsilane) (LOFS and HPFS) were synthesized by polycondensation of 1,1′-dilithioferrocene (FcLi2) with dimethyldichlorosilane (Me2SiCl2) and FcLi2 with methyltrichlorosilane (MeSiCl3) in THF under different conditions, respectively. The electrochemical behaviors of LOFS and HPFS in different solvents, such as THF, CH2Cl2, and CHCl3, were investigated systematically by means of cyclic voltammetry (CV). The influences of the solvent, structure of polymer, and scan rate on electrochemical behavior of poly(ferrocenylsilane) solutions are discussed. It is found that ΔE1/2 decreases with the fall of solvent polarity apart from the solvent donor effect and increases with the increase of the acceptor number (AN) of the solvent. More interestingly, the structure of polymer imposes greatly on the interaction between ferrocene units. According to the result, the mechanism of stepwise oxidation of the ferrocene units was proposed, that is, the different conformations of polymers, attaching to electrode surface, before and after oxidized resulted in the stepwise oxidation of ferrocene groups along a chain. Kinetic parameters from CVs indicate that the electrode processes are controlled by both the electrode reaction and mass diffusion and the electrochemical irreversibility of poly(ferrocenylsilane) solutions may be ascribed to the lower electron exchange efficiency on the electrode surface. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2880–2889, 2007