James Spencer - Academia.edu (original) (raw)
Papers by James Spencer
The electrical engineering handbook, May 3, 2007
Journal of Materials Science, 2016
Functionalization of boron nitride nanosheets (BNNSs) has always been a challenge due to its chem... more Functionalization of boron nitride nanosheets (BNNSs) has always been a challenge due to its chemical inertness and anti-oxidative properties. In a concentrated base environment, the B-N bonds on the surface of BNNSs were broken to produce a large number of B-OH and N-H functional groups. Afterwards, aniline carbocation produced by decomposition of the diazonium salt was utilized to achieve high grafting content of Ph-NH 2 groups onto the surface of BNNSs. Further, the amide reaction between amino and stearyl chloride verified the reactivity of Ph-NH 2 groups on the surface of BNNSs, with the result that BNNSs were abundantly decorated by aliphatic chains at 22.9 wt% grafting yield. The surface aliphatic chains of BNNSs strongly improved the interfacial adhesion between the High-density polyethylene (HDPE) matrix and the filler and provided an excellent dispersion of SC-BNNSs in the HDPE matrix. Therefore, HDPE/SC-BNNSs nanocomposites showed improved thermal stability, thermal conductivity, neutron shielding property and flexural modulus with no apparent reduction in tensile strength. When filler content exceeded 5 wt%, the HDPE/SC-BNNSs nanocomposites showed a higher thermal decomposition temperature than the composites with pristine BNNSs fillers. POLYM.
Thin films of very high purity aluminum were formed from the laser photolysis of trimethylamine a... more Thin films of very high purity aluminum were formed from the laser photolysis of trimethylamine alane (TMAA) using both ultraviolet (pulsed nitrogen) and visible (argon ion) laser irradiation on a variety of substrates including gold. Si (111), GaAs (110) and Teflon (PTFE). At thicknesses of up to 1 μm, nearly linear growth rates of 377 Ås-1 and 112 Ås-1 were observed. The formation of volatile species formed during the deposition of aluminum from TMAA was investigated by quadrupole mass spectrometry (QMS) of the reactant gas stream. The highest intensity post-deposition mass fragments were observed at m/z 58, 43 and 42 amu corresponding to [NC3H8]+, [NC2H5]+ and [NC2H4]+, respectively. These species arise from the dissociation and subsequent fragmentation of the trimethylamine ligand from the starting TMAA complex. Semi-empirical quantum chemical calculations (MNDO) for TMAA provided further support that photolysis of this precursor should result in principally ligand dissociation ...
Inorganic Chemistry, 1995
![Research paper thumbnail of Preparation and Characterization of Macropolyhedral Metallaborane Clusters from the anti -B 18 H 22 Borane Cluster: Crystal Structure of [(CH 3 ) 4 N][ a nti- B 18 H 20 Co(CO) 3 ]](https://attachments.academia-assets.com/86936203/thumbnails/1.jpg)
](Organometallics, 2002
The reaction of anti-B 18 H 22 with [Co 2 (CO) 8 ] and [(η 5-C 5 H 5)Fe(CO) 2 (C 6 H 10)] + yield... more The reaction of anti-B 18 H 22 with [Co 2 (CO) 8 ] and [(η 5-C 5 H 5)Fe(CO) 2 (C 6 H 10)] + yields the macropolyhedral metallaboranes [anti-B 18 H 20 Co(CO) 3 ][(CH 3) 4 N] (1) and [9-(Fe(CO) 2 (η 5-C 5 H 5))-anti-B 18 H 21 ] (2), respectively. Single-crystal X-ray diffraction analysis of complex 1 showed that the structure consists of an 11-vertex nido-cobaltaborane subunit edge shared with a 10-vertex nido-borane fragment. The initial synthesis of several 19-vertex metallaborane compounds, in which nickel, cobalt, palladium, platinum, and rhodium organometallic fragments were incorporated into the macropolyhedral framework of either the anti or syn configurations of B 18 H 22 , was first reported in 1973 by Todd and Sneath. 1 These compounds were prepared by employing a synthetic pathway involving the initial deprotonation of the B 18 H 22 cage to form the [B 18 H 20 ] 2species, followed by reaction with an appropriate organometallic reagent, such as [Co 2 (CO) 8 ], [Cl 2 Ni(Ph 2 PCH 2 CH 2 PPh 2)], or [RhCl(CO)-(PPh 3) 2 ], to produce the corresponding 19-vertex metallaborane. In 1982, Greenwood and co-workers reported the synthesis of platinum derivatives of the B 18 H 22 cluster, including [(Pt-η 4-anti-B 18 H 20)(PMe 2 Ph) 2 ], from the reaction of anti-[B 18 H 22 ] with cis-[PtCl 2 (PMe 2 Ph) 2 ]. 2 A more compact diplatinum derivative, [(Pt 2 B 18 H 16)(PMe 2-Ph) 4 ], was also formed from this reaction. Sneath and Todd proposed that the structures for their 19-vertex complexes consisted of 11-vertex nido-metallaborane fragments edge-shared with 10-vertex nido-borane subunits, illustrated in Figure 1, but spectroscopic characterization and structural studies were not provided. 1 The first unsubstituted 19-vertex borane species, nonadecaborane [B 19 H 20 ] n-, was reported in 2000, 3 although some questions have recently arisen, on the basis of computational studies, as to whether this species is best formulated as a 1-or 3-anionic compound. 4,5 Nonadecaborane displays essentially the same structure as the previously described 19-vertex metallaboranes, except that a B-H unit is inserted into the anti-B 18 H 22 framework instead of an organometallic subunit. In this paper, we report the first complete spectroscopic and structural characterization of the previously reported 19-vertex metallaborane [(CH 3) 4 N][anti-B 18 H 20-Co(CO) 3 ] (1). 1 In addition, we report the first example of the formation of an anti-B 18 H 21 cluster with an exobound organometallic moiety, [9-(Fe(CO) 2 (η 5-C 5 H 5))anti-B 18 H 21 ] (2). Experimental Section Physical Measurements. 11 B NMR spectra were recorded on a Brü ker DPX-300 NMR spectrometer operating at 96.3 MHz. Typical 11 B NMR acquisition parameters were a relaxation delay of 0.1 ms and a 90°pulse of 10 µs. Proton (1 H) and carbon (13 C) NMR spectra were recorded on a Brü ker DPX-300 spectrometer operating at 300.15 and 77.47 MHz, respectively. Mass spectra were obtained in the Mass Spectrometry Laboratory, University of Illinois. The 70-VSE mass spectrometer was purchased in part with a grant from the Division of Research Resources, National Institutes of Health (RR 04648). Unit resolution mass spectra were obtained on a Hewlett-Packard Model 5989B gas chromatograph/mass spectrometer (GC/MS) using an ionization potential of between 11 and 70 eV. FT-IR spectra were measured on a Mattson Galaxy 2020 spectrometer and were referenced to the 1602.8 cm-1 band of polystyrene. UV-vis spectral data were collected on a Cary 1 UV-vis spectrophotometer in a quartz cell. Materials. All solvents were reagent grade or better. Tetrahydrofuran (THF) and hexanes were distilled over potassium metal prior to use. The reagents anti-B18H22 and [(η 5-C5H5)Fe(CO)2(C6H10)][PF6] were synthesized as previously described. 1,7 TLC plates were purchased from the Aldrich Chemical Co. All other commercially available reagents were used as received. Synthesis and X-ray Crystallographic Studies of
![Research paper thumbnail of The synthesis and characterization of two new 19-vertex metallaborane clusters: [B18H20Ni(η5-C5H5)]−1 and [B18H19(2-THF)Ni(η5-C5H5)]](https://attachments.academia-assets.com/86936191/thumbnails/1.jpg)
](Inorganic Chemistry Communications, 2002
Two new 19-vertex metallaboranes, ½B 18 H 20 Niðg 5-C 5 H 5 Þ½NðCH 3 Þ 4 and ½B 18 H 19 ð2-THFÞNi... more Two new 19-vertex metallaboranes, ½B 18 H 20 Niðg 5-C 5 H 5 Þ½NðCH 3 Þ 4 and ½B 18 H 19 ð2-THFÞNiðg 5-C 5 H 5 Þ, were isolated from the reaction of anti-B 18 H 22 with nickelocene, ½Niðg 5-C 5 H 5 Þ 2 , in high yields. The complexes were characterized by multinuclear NMR (1 H, 13 C, 11 B), IR and UV-vis spectroscopy. Single-crystal X-ray diffraction analyses of these new complexes confirmed their structures as 19-vertex conjuncto-metallaborane clusters.
![Research paper thumbnail of Oxidation - Reduction and Photochemical Reactions of Metalladecaborane Clusters: The Interconversion ofhypercloso-[(η6-C6Me6)RuB9H9] andcloso-[(η6-C6Me6)RuB9H9]2−](https://attachments.academia-assets.com/86936100/thumbnails/1.jpg)
](Angewandte Chemie International Edition, 2000
Inorganic Chemistry, 2001
A theoretical study of several new classes of polyhedral-based molecules has shown that these spe... more A theoretical study of several new classes of polyhedral-based molecules has shown that these species display large calculated nonlinear optical responses. These new classes of molecules are based on charged aromatic subunits connected through polyhedral cluster bridges, such as closo-[1-(C 7 H 6)-12-(C 5 Me 4)C 2 B 10 H 10 ]. These compounds show calculated first hyperpolarizabilities () ranging from 6.5 to 8413.9 × 10-30 cm 5 esu-1. A basis for understanding the origin of these large responses is proposed based on the two-state model and consideration of the orbital and electronic features of the molecules. In general, the highest occupied molecular orbitals for these species are localized on the aromatic donor rings, such as the cyclopentadienyl system, while the lowest unoccupied molecular orbitals are largely on the aromatic acceptor rings, such as the tropylium system. The electronic properties of these polyhedral-based systems appear to be significantly different from the analogous organic [5.6.7]quinarene system (tropyliumcyclopentadienylbenzene). The organic quinarene appears to behave as a completely electrondelocalized system over all three rings while the polyhedral-based compounds can best be described as consisting of two relatively independent, highly polarized regions.
Dalton Transactions, 2011
The reaction of cyanogen chloride with [1-(4-C(7)H(7))-12-(C(5)H(3)-3,4-(CH(3))(2))-C(2)B(10)H(10... more The reaction of cyanogen chloride with [1-(4-C(7)H(7))-12-(C(5)H(3)-3,4-(CH(3))(2))-C(2)B(10)H(10)] (7) was found to yield two new C(5)-substituted carborane cluster-based compounds, [1-(4-C(7)H(7))-12-(C(5)H(2)-3-(CN)-3,4-(CH(3))(2))-C(2)B(10)H(10)] (8) and [1-(4-C(7)H(7))-12-(C(5)H-2,4-(CN)(2)-3,4-(CH(3))(2))-C(2)B(10)H(10)] (9). This cyano-substitution pattern is in contrast to the known substitution for the analogous organic quinarene[5.6.7] system. The observed unique cluster-based products may be understood by a combination of steric and electronic effects. Compounds 8 and 9 were characterized by complete multinuclear NMR, (1)H-(1)H COSY NMR, (1)H-(13)C HMQC NMR, FTIR, UV-Vis, IR, MS data and a single crystal analysis for 8 [X-ray data for 8: C(17)H(25)B(10)N, monoclinic, space group P2(1)/n with cell constants a = 8.6794(17) Å, b = 11.021(2) Å, c = 43.175(9) Å, β = 91.00(3)°, V = 4129.2(14) Å(3), Z = 8, R(1) = 0.0729, wR(2) = 0.1464].
Journal of Chemical Crystallography
J Am Chem Soc, 1991
Evidence for the Adsorption of Oriented nido-R2C2B4H6 ... Sunwoo Lee,t Dongqi Li,f P. A. Dowben,*... more Evidence for the Adsorption of Oriented nido-R2C2B4H6 ... Sunwoo Lee,t Dongqi Li,f P. A. Dowben,*Vt F. Keith Perkins,$ M. Onellion,* and James T. Spencer*vg ... Contribution from the Department of Physics, Syracuse University, Syracuse, New York 13244-1 1 30, the ...
... Lett., 41, 1048 (1982). [3] PK Boyer, CA Moore, R. Solanki, WK Ritchie, GA Roche and GJ Colli... more ... Lett., 41, 1048 (1982). [3] PK Boyer, CA Moore, R. Solanki, WK Ritchie, GA Roche and GJ Collins, Laser Diagnostics and Photochemical Processing for Semiconductor Devices, edited by RM Osgood, SRJ Brueck and HR Schlossberg, Mat. Res. Soc. ... [14] Shikha Varma, Yoon-Gi ...
The Journal of Physical Chemistry, 1993
Borane and carborane cluster compounds and their corre-sponding metal complexes are attracting in... more Borane and carborane cluster compounds and their corre-sponding metal complexes are attracting interest as possible source compounds for the chemical vapor deposition (CVD) of a wide variety of thin film materials including variable bandgap boron carbide thin film ...
Metallized Plastics 3, 1992
MRS Proceedings, 1988
ABSTRACTNew borane clusters and their corresponding transition and rare earth metal complexes are... more ABSTRACTNew borane clusters and their corresponding transition and rare earth metal complexes are currently being investigated in our laboratories for their utility as unique source materials for the formation of both metallic and non-metallic thin films. These borane cluster complexes exhibit highly favorable properties for use in OMVPE processes, such as; (1) relatively high volatility, (2) anticipated high stability of the ligand itself to provide clean ligand-metal dissociations, (3) high temperature stabilities of the complexes, (4) readily preparable in significant quantities, and (5) availability of theoretical and spectroscopic probes of structure-reactivity relationships. In this work, we have prepared both non-metallic thin films, including materials such as boron nitride, and metallic thin films (both the transition and rare earth metals) through the use of these unique cluster materials.Boron nitride has been investigated as a potential hard coating for use as an insulat...
The electrical engineering handbook, May 3, 2007
Journal of Materials Science, 2016
Functionalization of boron nitride nanosheets (BNNSs) has always been a challenge due to its chem... more Functionalization of boron nitride nanosheets (BNNSs) has always been a challenge due to its chemical inertness and anti-oxidative properties. In a concentrated base environment, the B-N bonds on the surface of BNNSs were broken to produce a large number of B-OH and N-H functional groups. Afterwards, aniline carbocation produced by decomposition of the diazonium salt was utilized to achieve high grafting content of Ph-NH 2 groups onto the surface of BNNSs. Further, the amide reaction between amino and stearyl chloride verified the reactivity of Ph-NH 2 groups on the surface of BNNSs, with the result that BNNSs were abundantly decorated by aliphatic chains at 22.9 wt% grafting yield. The surface aliphatic chains of BNNSs strongly improved the interfacial adhesion between the High-density polyethylene (HDPE) matrix and the filler and provided an excellent dispersion of SC-BNNSs in the HDPE matrix. Therefore, HDPE/SC-BNNSs nanocomposites showed improved thermal stability, thermal conductivity, neutron shielding property and flexural modulus with no apparent reduction in tensile strength. When filler content exceeded 5 wt%, the HDPE/SC-BNNSs nanocomposites showed a higher thermal decomposition temperature than the composites with pristine BNNSs fillers. POLYM.
Thin films of very high purity aluminum were formed from the laser photolysis of trimethylamine a... more Thin films of very high purity aluminum were formed from the laser photolysis of trimethylamine alane (TMAA) using both ultraviolet (pulsed nitrogen) and visible (argon ion) laser irradiation on a variety of substrates including gold. Si (111), GaAs (110) and Teflon (PTFE). At thicknesses of up to 1 μm, nearly linear growth rates of 377 Ås-1 and 112 Ås-1 were observed. The formation of volatile species formed during the deposition of aluminum from TMAA was investigated by quadrupole mass spectrometry (QMS) of the reactant gas stream. The highest intensity post-deposition mass fragments were observed at m/z 58, 43 and 42 amu corresponding to [NC3H8]+, [NC2H5]+ and [NC2H4]+, respectively. These species arise from the dissociation and subsequent fragmentation of the trimethylamine ligand from the starting TMAA complex. Semi-empirical quantum chemical calculations (MNDO) for TMAA provided further support that photolysis of this precursor should result in principally ligand dissociation ...
Inorganic Chemistry, 1995
Organometallics, 2002
The reaction of anti-B 18 H 22 with [Co 2 (CO) 8 ] and [(η 5-C 5 H 5)Fe(CO) 2 (C 6 H 10)] + yield... more The reaction of anti-B 18 H 22 with [Co 2 (CO) 8 ] and [(η 5-C 5 H 5)Fe(CO) 2 (C 6 H 10)] + yields the macropolyhedral metallaboranes [anti-B 18 H 20 Co(CO) 3 ][(CH 3) 4 N] (1) and [9-(Fe(CO) 2 (η 5-C 5 H 5))-anti-B 18 H 21 ] (2), respectively. Single-crystal X-ray diffraction analysis of complex 1 showed that the structure consists of an 11-vertex nido-cobaltaborane subunit edge shared with a 10-vertex nido-borane fragment. The initial synthesis of several 19-vertex metallaborane compounds, in which nickel, cobalt, palladium, platinum, and rhodium organometallic fragments were incorporated into the macropolyhedral framework of either the anti or syn configurations of B 18 H 22 , was first reported in 1973 by Todd and Sneath. 1 These compounds were prepared by employing a synthetic pathway involving the initial deprotonation of the B 18 H 22 cage to form the [B 18 H 20 ] 2species, followed by reaction with an appropriate organometallic reagent, such as [Co 2 (CO) 8 ], [Cl 2 Ni(Ph 2 PCH 2 CH 2 PPh 2)], or [RhCl(CO)-(PPh 3) 2 ], to produce the corresponding 19-vertex metallaborane. In 1982, Greenwood and co-workers reported the synthesis of platinum derivatives of the B 18 H 22 cluster, including [(Pt-η 4-anti-B 18 H 20)(PMe 2 Ph) 2 ], from the reaction of anti-[B 18 H 22 ] with cis-[PtCl 2 (PMe 2 Ph) 2 ]. 2 A more compact diplatinum derivative, [(Pt 2 B 18 H 16)(PMe 2-Ph) 4 ], was also formed from this reaction. Sneath and Todd proposed that the structures for their 19-vertex complexes consisted of 11-vertex nido-metallaborane fragments edge-shared with 10-vertex nido-borane subunits, illustrated in Figure 1, but spectroscopic characterization and structural studies were not provided. 1 The first unsubstituted 19-vertex borane species, nonadecaborane [B 19 H 20 ] n-, was reported in 2000, 3 although some questions have recently arisen, on the basis of computational studies, as to whether this species is best formulated as a 1-or 3-anionic compound. 4,5 Nonadecaborane displays essentially the same structure as the previously described 19-vertex metallaboranes, except that a B-H unit is inserted into the anti-B 18 H 22 framework instead of an organometallic subunit. In this paper, we report the first complete spectroscopic and structural characterization of the previously reported 19-vertex metallaborane [(CH 3) 4 N][anti-B 18 H 20-Co(CO) 3 ] (1). 1 In addition, we report the first example of the formation of an anti-B 18 H 21 cluster with an exobound organometallic moiety, [9-(Fe(CO) 2 (η 5-C 5 H 5))anti-B 18 H 21 ] (2). Experimental Section Physical Measurements. 11 B NMR spectra were recorded on a Brü ker DPX-300 NMR spectrometer operating at 96.3 MHz. Typical 11 B NMR acquisition parameters were a relaxation delay of 0.1 ms and a 90°pulse of 10 µs. Proton (1 H) and carbon (13 C) NMR spectra were recorded on a Brü ker DPX-300 spectrometer operating at 300.15 and 77.47 MHz, respectively. Mass spectra were obtained in the Mass Spectrometry Laboratory, University of Illinois. The 70-VSE mass spectrometer was purchased in part with a grant from the Division of Research Resources, National Institutes of Health (RR 04648). Unit resolution mass spectra were obtained on a Hewlett-Packard Model 5989B gas chromatograph/mass spectrometer (GC/MS) using an ionization potential of between 11 and 70 eV. FT-IR spectra were measured on a Mattson Galaxy 2020 spectrometer and were referenced to the 1602.8 cm-1 band of polystyrene. UV-vis spectral data were collected on a Cary 1 UV-vis spectrophotometer in a quartz cell. Materials. All solvents were reagent grade or better. Tetrahydrofuran (THF) and hexanes were distilled over potassium metal prior to use. The reagents anti-B18H22 and [(η 5-C5H5)Fe(CO)2(C6H10)][PF6] were synthesized as previously described. 1,7 TLC plates were purchased from the Aldrich Chemical Co. All other commercially available reagents were used as received. Synthesis and X-ray Crystallographic Studies of
Inorganic Chemistry Communications, 2002
Two new 19-vertex metallaboranes, ½B 18 H 20 Niðg 5-C 5 H 5 Þ½NðCH 3 Þ 4 and ½B 18 H 19 ð2-THFÞNi... more Two new 19-vertex metallaboranes, ½B 18 H 20 Niðg 5-C 5 H 5 Þ½NðCH 3 Þ 4 and ½B 18 H 19 ð2-THFÞNiðg 5-C 5 H 5 Þ, were isolated from the reaction of anti-B 18 H 22 with nickelocene, ½Niðg 5-C 5 H 5 Þ 2 , in high yields. The complexes were characterized by multinuclear NMR (1 H, 13 C, 11 B), IR and UV-vis spectroscopy. Single-crystal X-ray diffraction analyses of these new complexes confirmed their structures as 19-vertex conjuncto-metallaborane clusters.
Angewandte Chemie International Edition, 2000
Inorganic Chemistry, 2001
A theoretical study of several new classes of polyhedral-based molecules has shown that these spe... more A theoretical study of several new classes of polyhedral-based molecules has shown that these species display large calculated nonlinear optical responses. These new classes of molecules are based on charged aromatic subunits connected through polyhedral cluster bridges, such as closo-[1-(C 7 H 6)-12-(C 5 Me 4)C 2 B 10 H 10 ]. These compounds show calculated first hyperpolarizabilities () ranging from 6.5 to 8413.9 × 10-30 cm 5 esu-1. A basis for understanding the origin of these large responses is proposed based on the two-state model and consideration of the orbital and electronic features of the molecules. In general, the highest occupied molecular orbitals for these species are localized on the aromatic donor rings, such as the cyclopentadienyl system, while the lowest unoccupied molecular orbitals are largely on the aromatic acceptor rings, such as the tropylium system. The electronic properties of these polyhedral-based systems appear to be significantly different from the analogous organic [5.6.7]quinarene system (tropyliumcyclopentadienylbenzene). The organic quinarene appears to behave as a completely electrondelocalized system over all three rings while the polyhedral-based compounds can best be described as consisting of two relatively independent, highly polarized regions.
Dalton Transactions, 2011
The reaction of cyanogen chloride with [1-(4-C(7)H(7))-12-(C(5)H(3)-3,4-(CH(3))(2))-C(2)B(10)H(10... more The reaction of cyanogen chloride with [1-(4-C(7)H(7))-12-(C(5)H(3)-3,4-(CH(3))(2))-C(2)B(10)H(10)] (7) was found to yield two new C(5)-substituted carborane cluster-based compounds, [1-(4-C(7)H(7))-12-(C(5)H(2)-3-(CN)-3,4-(CH(3))(2))-C(2)B(10)H(10)] (8) and [1-(4-C(7)H(7))-12-(C(5)H-2,4-(CN)(2)-3,4-(CH(3))(2))-C(2)B(10)H(10)] (9). This cyano-substitution pattern is in contrast to the known substitution for the analogous organic quinarene[5.6.7] system. The observed unique cluster-based products may be understood by a combination of steric and electronic effects. Compounds 8 and 9 were characterized by complete multinuclear NMR, (1)H-(1)H COSY NMR, (1)H-(13)C HMQC NMR, FTIR, UV-Vis, IR, MS data and a single crystal analysis for 8 [X-ray data for 8: C(17)H(25)B(10)N, monoclinic, space group P2(1)/n with cell constants a = 8.6794(17) Å, b = 11.021(2) Å, c = 43.175(9) Å, β = 91.00(3)°, V = 4129.2(14) Å(3), Z = 8, R(1) = 0.0729, wR(2) = 0.1464].
Journal of Chemical Crystallography
J Am Chem Soc, 1991
Evidence for the Adsorption of Oriented nido-R2C2B4H6 ... Sunwoo Lee,t Dongqi Li,f P. A. Dowben,*... more Evidence for the Adsorption of Oriented nido-R2C2B4H6 ... Sunwoo Lee,t Dongqi Li,f P. A. Dowben,*Vt F. Keith Perkins,$ M. Onellion,* and James T. Spencer*vg ... Contribution from the Department of Physics, Syracuse University, Syracuse, New York 13244-1 1 30, the ...
... Lett., 41, 1048 (1982). [3] PK Boyer, CA Moore, R. Solanki, WK Ritchie, GA Roche and GJ Colli... more ... Lett., 41, 1048 (1982). [3] PK Boyer, CA Moore, R. Solanki, WK Ritchie, GA Roche and GJ Collins, Laser Diagnostics and Photochemical Processing for Semiconductor Devices, edited by RM Osgood, SRJ Brueck and HR Schlossberg, Mat. Res. Soc. ... [14] Shikha Varma, Yoon-Gi ...
The Journal of Physical Chemistry, 1993
Borane and carborane cluster compounds and their corre-sponding metal complexes are attracting in... more Borane and carborane cluster compounds and their corre-sponding metal complexes are attracting interest as possible source compounds for the chemical vapor deposition (CVD) of a wide variety of thin film materials including variable bandgap boron carbide thin film ...
Metallized Plastics 3, 1992
MRS Proceedings, 1988
ABSTRACTNew borane clusters and their corresponding transition and rare earth metal complexes are... more ABSTRACTNew borane clusters and their corresponding transition and rare earth metal complexes are currently being investigated in our laboratories for their utility as unique source materials for the formation of both metallic and non-metallic thin films. These borane cluster complexes exhibit highly favorable properties for use in OMVPE processes, such as; (1) relatively high volatility, (2) anticipated high stability of the ligand itself to provide clean ligand-metal dissociations, (3) high temperature stabilities of the complexes, (4) readily preparable in significant quantities, and (5) availability of theoretical and spectroscopic probes of structure-reactivity relationships. In this work, we have prepared both non-metallic thin films, including materials such as boron nitride, and metallic thin films (both the transition and rare earth metals) through the use of these unique cluster materials.Boron nitride has been investigated as a potential hard coating for use as an insulat...