Alfred Sattelberger - Academia.edu (original) (raw)
Papers by Alfred Sattelberger
![Research paper thumbnail of Structural study of the ammonium octafluoroneptunate, [NH4]4NpF8](https://attachments.academia-assets.com/120543217/thumbnails/1.jpg)
](Inorganica Chimica Acta, 2016
Journal of Chemical Education, 2017
The radioactive nature of technetium is discussed using a combination of introductory nuclear phy... more The radioactive nature of technetium is discussed using a combination of introductory nuclear physics concepts and empirical trends observed in the chart of the nuclides and the periodic table of the elements. Trends such as the enhanced stability of nucleon pairs, magic numbers, and Mattauch's rule are described. The concepts of nuclear binding energies and the nuclear shell model are introduced and used to explain the relative stability of radionuclides and, in particular, the isotopes of technetium.
Inorganic Chemistry, Nov 15, 2012
Technetium is intimately linked with nuclear reactions. The ultraminute natural levels in the env... more Technetium is intimately linked with nuclear reactions. The ultraminute natural levels in the environment are due to the spontaneous fission of uranium isotopes. The discovery of technetium was born from accelerator reactions, and its use and presence in the modern world are directly due to nuclear reactors. While occupying a central location in the periodic table, the chemistry of technetium is poorly explored, especially when compared to its neighboring elements, i.e., molybdenum, ruthenium, and rhenium. This state of affairs, which is tied to the small number of laboratories equipped to work with the long-lived 99 Tc isotope, provides a remarkable opportunity to combine basic studies with applications for the nuclear fuel cycle. An example is given through examination of the technetium halide compounds. Binary metal halides represent some of the most fundamental of inorganic compounds. The synthesis of new technetium halides demonstrates trends with structure, coordination number, and speciation that can be utilized in the nuclear fuel cycle. Examples are provided for technetium−zirconium alloys as waste forms and the formation of reduced technetium species in separations.
Inorganic Chemistry, 1989
... (30) Karraker, DG; Stone, J. A. Inorg. Chem. 1972, 11, 1742. (31) Wasserman, HJ; Zozulin, AJ;... more ... (30) Karraker, DG; Stone, J. A. Inorg. Chem. 1972, 11, 1742. (31) Wasserman, HJ; Zozulin, AJ; Moody, DC; Ryan, RR; Salazar, K. V. J. Organomet. Chem. 1983, 254, 305. Inorganic and Structural Chemistry David L. Clark Group (INC-4) Alfred P. Sattelberger* Isotope and ...
Nature Biotechnology, 1999
 4 }[Re 4 F 18 ]·4H 2 O](https://attachments.academia-assets.com/102650576/thumbnails/1.jpg)
](European Journal of Inorganic Chemistry, 2019
The compound {[Ni(H 2 O) 6 ](NH 4) 4 }[Re 4 F 18 ]•4H 2 O (1) has been isolated and characterized... more The compound {[Ni(H 2 O) 6 ](NH 4) 4 }[Re 4 F 18 ]•4H 2 O (1) has been isolated and characterized by single-crystal X-ray diffraction, Raman spectroscopy and computational methods. The compound 1 crystallizes in the triclinic space group P1 (a = 6.6620(9) Å, b = 9.7121(13) Å, c = 11.2007(15) Å, α = 67.644(2)°, = 83.827(2)°, γ = 84.366(2)°). In 1, the [Re 4 F 18 ] 6anion is composed of four Re(III) atoms bridged by two μ-bridging fluorine atoms and two di-μ-bridging fluorine atoms. In [Re 4 F 18 ] 6-, the shortest Re-Re distance (i.e., 2.3631(6) Å) is characteristic of the
Dalton transactions (Cambridge, England : 2003), Jan 14, 2018
Dimeric and monomeric supported single-site Fe(ii) pre-catalysts on SiO2 have been prepared via o... more Dimeric and monomeric supported single-site Fe(ii) pre-catalysts on SiO2 have been prepared via organometallic grafting and characterized with advanced spectroscopic techniques. Manipulation of the surface hydroxyl concentration on the support influences monomer/dimer formation. While both pre-catalysts are highly active in liquid-phase hydrogenation, the dimeric pre-catalyst is ∼3× faster than the monomer. Preliminary XAS experiments on the H2-activated samples suggest the active species are isolated Fe(ii) sites.
Inorganic chemistry, Jan 4, 2016
Ditechnetium heptoxide was synthesized from the oxidation of TcO2 with O2 at 450 °C and character... more Ditechnetium heptoxide was synthesized from the oxidation of TcO2 with O2 at 450 °C and characterized by single-crystal X-ray diffraction, electron-impact mass spectrometry (EI-MS), and theoretical methods. Refinement of the structure at 100 K indicates that Tc2O7 crystallizes as a molecular solid in the orthorhombic space group Pbca [a = 7.312(3) Å, b = 5.562(2) Å, c = 13.707(5) Å, and V = 557.5(3) Å(3)]. The Tc2O7 molecule can be described as corner-sharing TcO4 tetrahedron [Tc---Tc = 3.698(1) Å and Tc-OBri-Tc = 180.0°]. The EI-MS spectrum of Tc2O7 consists of both mononuclear and dinuclear species. The main dinuclear species in the gas-phase are Tc2O7 (100%) and Tc2O5 (56%), while the main mononuclear species are TcO3 (33.9%) and TcO2 (42.8%). The difference in the relative intensities of the M2O5 (M = Tc, Re) fragments (1.7% for Re) indicates that these group 7 elements exhibit different gas-phase chemistry. The solid-state structure of Tc2O7 was investigated by density function...
Inorganic Chemistry, 2016
The dinuclear rhenium(II) complex Re 2 Br 4 (PMe 3) 4 was prepared from the reduction of [Re 2 Br... more The dinuclear rhenium(II) complex Re 2 Br 4 (PMe 3) 4 was prepared from the reduction of [Re 2 Br 8 ] 2− with (n-Bu 4 N)BH 4 in the presence of PMe 3 in propanol. The complex was characterized by single-crystal X-ray diffraction (SCXRD) and UV−visible spectroscopy. It crystallizes in the monoclinic C2/c space group and is isostructural with its molybdenum and technetium analogues. The Re−Re distance (2.2521(3) Å) is slightly longer than the one in Re 2 Cl 4 (PMe 3) 4 (2.247(1) Å). The molecular and electronic structure of Re 2 X 4 (PMe 3) 4 (X = Cl, Br) were studied by multiconfigurational quantum chemical methods. The computed ground-state geometry is in excellent agreement with the experimental structure determined by SCXRD. The calculated total bond order (2.75) is consistent with the presence of an electron-rich triple bond and is similar to the one found for Re 2 Cl 4 (PMe 3) 4. The electronic absorption spectrum of Re 2 Br 4 (PMe 3) 4 was recorded in benzene and shows a series of lowintensity bands in the range 10 000−26 000 cm −1. The absorption bands were assigned based on calculations of the excitation energies with the multireference wave functions followed by second-order perturbation theory using the CASSCF/CASPT2 method. Calculations predict that the lowest energy band corresponds to the δ* → σ* transition, while the next higher energy bands were attributed to the δ* → π*, δ → σ*, and δ → π* transitions.
Inorganic chemistry, Jan 12, 2016
A simple method for the high-yield preparation of (NH4)2[Re2F8]·2H2O has been developed that invo... more A simple method for the high-yield preparation of (NH4)2[Re2F8]·2H2O has been developed that involves the reaction of (n-Bu4N)2[Re2Cl8] with molten ammonium bifluoride (NH4HF2). Using this method, the new salt [NH4]2[Re2F8]·2H2O was prepared in ∼90% yield. The product was characterized in solution by ultraviolet-visible light (UV-vis) and (19)F nuclear magnetic resonance ((19)F NMR) spectroscopies and in the solid-state by elemental analysis, powder X-ray diffraction (XRD), and infrared (IR) spectroscopy. Multiconfigurational CASSCF/CASPT2 quantum chemical calculations were performed to investigate the molecular and electronic structure, as well as the electronic absorption spectrum of the [Re2F8](2-) anion. The metal-metal bonding in the Re2(6+) unit was quantified in terms of effective bond order (EBO) and compared to that of its [Re2Cl8](2-) and [Re2Br8](2-) analogues.
Thin, highly reflective rhodium films with metal compositions greater than 98% (elemental weight ... more Thin, highly reflective rhodium films with metal compositions greater than 98% (elemental weight percentage) have been deposited by chemical vapor deposition using Rh(allyl){sub 3} (allyl = {eta}{sup 3}-C{sub 3}H{sub 5}) in the presence of a hydrogen plasma. Uniform, crystalline films that adhere well to several types of substrates result from depositions at temperatures as low as 150{degrees}C. Depositions using H{sub 2} (no plasma), or an argon plasma yields material that is amorphous, contains a significant amount (>14%) of residual carbon, and has a dramatically slower growth rate. The composition of these materials does not vary significantly from that of the materials obtained from the in vacuo thermal deposition with Rh(allyl){sub 3}. 23 refs.
Nuclear Medicine and Biology, 2010
Tricarbonylrhenium(I) complexes with a bidentate ligand N-methyl-2pyridinecarboxyamide (LH), [Re(... more Tricarbonylrhenium(I) complexes with a bidentate ligand N-methyl-2pyridinecarboxyamide (LH), [Re(CO) 3 (LH)H 2 O] + and [Re(CO) 3 (LH)Br], were prepared. The first complex was synthesized for rhenium radioisotope (Re-188). The second compound in the form of yellow crystals was obtained for stable, nonradioactive rhenium. The exchange of bromide ion and water molecule in these complexes for imidazol (im) was studied. It was appeared that imidazol quickly replaces the monodentate ligand. Single-crystal X-ray diffraction measurements showed flexidentate behaviour of N-methyl-2pyridinecarboxyamide which coordinates as neutral N,O-donor in [Re(CO) 3 LH NO Br] and as anionic N,N-donor in [Re(CO) 3 L NN (im)]. This interesting feature of that ligand offers an attractive perspectives to obtain mixed tricarbonylrhenium(I) complexes with bidentate and different monodentate ligands, what could be very important for nuclear medicine applications.
ChemInform, 2014
ABSTRACT Review: [preparation, solid state and electronic structures, and spectroscopic propertie... more ABSTRACT Review: [preparation, solid state and electronic structures, and spectroscopic properties of (Bu4N)2Tc2X8, Tc2(OAc)4X2, Tc2(OAc)2Cl4, cesium salts of Tc2X83-, and Tc2X4(PMe3)4 (X: Cl, Br); 38 refs.
This patent describes a nanocrystalline film, it comprises: a substantially carbon-free metal sel... more This patent describes a nanocrystalline film, it comprises: a substantially carbon-free metal selected from the group consisting of rhodium, iridium, molybdenum, tungsten, rhenium, platinum, or palladium.
Inorganica Chimica Acta, 2016
Journal of Chemical Education, 2017
The radioactive nature of technetium is discussed using a combination of introductory nuclear phy... more The radioactive nature of technetium is discussed using a combination of introductory nuclear physics concepts and empirical trends observed in the chart of the nuclides and the periodic table of the elements. Trends such as the enhanced stability of nucleon pairs, magic numbers, and Mattauch's rule are described. The concepts of nuclear binding energies and the nuclear shell model are introduced and used to explain the relative stability of radionuclides and, in particular, the isotopes of technetium.
Inorganic Chemistry, Nov 15, 2012
Technetium is intimately linked with nuclear reactions. The ultraminute natural levels in the env... more Technetium is intimately linked with nuclear reactions. The ultraminute natural levels in the environment are due to the spontaneous fission of uranium isotopes. The discovery of technetium was born from accelerator reactions, and its use and presence in the modern world are directly due to nuclear reactors. While occupying a central location in the periodic table, the chemistry of technetium is poorly explored, especially when compared to its neighboring elements, i.e., molybdenum, ruthenium, and rhenium. This state of affairs, which is tied to the small number of laboratories equipped to work with the long-lived 99 Tc isotope, provides a remarkable opportunity to combine basic studies with applications for the nuclear fuel cycle. An example is given through examination of the technetium halide compounds. Binary metal halides represent some of the most fundamental of inorganic compounds. The synthesis of new technetium halides demonstrates trends with structure, coordination number, and speciation that can be utilized in the nuclear fuel cycle. Examples are provided for technetium−zirconium alloys as waste forms and the formation of reduced technetium species in separations.
Inorganic Chemistry, 1989
... (30) Karraker, DG; Stone, J. A. Inorg. Chem. 1972, 11, 1742. (31) Wasserman, HJ; Zozulin, AJ;... more ... (30) Karraker, DG; Stone, J. A. Inorg. Chem. 1972, 11, 1742. (31) Wasserman, HJ; Zozulin, AJ; Moody, DC; Ryan, RR; Salazar, K. V. J. Organomet. Chem. 1983, 254, 305. Inorganic and Structural Chemistry David L. Clark Group (INC-4) Alfred P. Sattelberger* Isotope and ...
Nature Biotechnology, 1999
European Journal of Inorganic Chemistry, 2019
The compound {[Ni(H 2 O) 6 ](NH 4) 4 }[Re 4 F 18 ]•4H 2 O (1) has been isolated and characterized... more The compound {[Ni(H 2 O) 6 ](NH 4) 4 }[Re 4 F 18 ]•4H 2 O (1) has been isolated and characterized by single-crystal X-ray diffraction, Raman spectroscopy and computational methods. The compound 1 crystallizes in the triclinic space group P1 (a = 6.6620(9) Å, b = 9.7121(13) Å, c = 11.2007(15) Å, α = 67.644(2)°, = 83.827(2)°, γ = 84.366(2)°). In 1, the [Re 4 F 18 ] 6anion is composed of four Re(III) atoms bridged by two μ-bridging fluorine atoms and two di-μ-bridging fluorine atoms. In [Re 4 F 18 ] 6-, the shortest Re-Re distance (i.e., 2.3631(6) Å) is characteristic of the
Dalton transactions (Cambridge, England : 2003), Jan 14, 2018
Dimeric and monomeric supported single-site Fe(ii) pre-catalysts on SiO2 have been prepared via o... more Dimeric and monomeric supported single-site Fe(ii) pre-catalysts on SiO2 have been prepared via organometallic grafting and characterized with advanced spectroscopic techniques. Manipulation of the surface hydroxyl concentration on the support influences monomer/dimer formation. While both pre-catalysts are highly active in liquid-phase hydrogenation, the dimeric pre-catalyst is ∼3× faster than the monomer. Preliminary XAS experiments on the H2-activated samples suggest the active species are isolated Fe(ii) sites.
Inorganic chemistry, Jan 4, 2016
Ditechnetium heptoxide was synthesized from the oxidation of TcO2 with O2 at 450 °C and character... more Ditechnetium heptoxide was synthesized from the oxidation of TcO2 with O2 at 450 °C and characterized by single-crystal X-ray diffraction, electron-impact mass spectrometry (EI-MS), and theoretical methods. Refinement of the structure at 100 K indicates that Tc2O7 crystallizes as a molecular solid in the orthorhombic space group Pbca [a = 7.312(3) Å, b = 5.562(2) Å, c = 13.707(5) Å, and V = 557.5(3) Å(3)]. The Tc2O7 molecule can be described as corner-sharing TcO4 tetrahedron [Tc---Tc = 3.698(1) Å and Tc-OBri-Tc = 180.0°]. The EI-MS spectrum of Tc2O7 consists of both mononuclear and dinuclear species. The main dinuclear species in the gas-phase are Tc2O7 (100%) and Tc2O5 (56%), while the main mononuclear species are TcO3 (33.9%) and TcO2 (42.8%). The difference in the relative intensities of the M2O5 (M = Tc, Re) fragments (1.7% for Re) indicates that these group 7 elements exhibit different gas-phase chemistry. The solid-state structure of Tc2O7 was investigated by density function...
Inorganic Chemistry, 2016
The dinuclear rhenium(II) complex Re 2 Br 4 (PMe 3) 4 was prepared from the reduction of [Re 2 Br... more The dinuclear rhenium(II) complex Re 2 Br 4 (PMe 3) 4 was prepared from the reduction of [Re 2 Br 8 ] 2− with (n-Bu 4 N)BH 4 in the presence of PMe 3 in propanol. The complex was characterized by single-crystal X-ray diffraction (SCXRD) and UV−visible spectroscopy. It crystallizes in the monoclinic C2/c space group and is isostructural with its molybdenum and technetium analogues. The Re−Re distance (2.2521(3) Å) is slightly longer than the one in Re 2 Cl 4 (PMe 3) 4 (2.247(1) Å). The molecular and electronic structure of Re 2 X 4 (PMe 3) 4 (X = Cl, Br) were studied by multiconfigurational quantum chemical methods. The computed ground-state geometry is in excellent agreement with the experimental structure determined by SCXRD. The calculated total bond order (2.75) is consistent with the presence of an electron-rich triple bond and is similar to the one found for Re 2 Cl 4 (PMe 3) 4. The electronic absorption spectrum of Re 2 Br 4 (PMe 3) 4 was recorded in benzene and shows a series of lowintensity bands in the range 10 000−26 000 cm −1. The absorption bands were assigned based on calculations of the excitation energies with the multireference wave functions followed by second-order perturbation theory using the CASSCF/CASPT2 method. Calculations predict that the lowest energy band corresponds to the δ* → σ* transition, while the next higher energy bands were attributed to the δ* → π*, δ → σ*, and δ → π* transitions.
Inorganic chemistry, Jan 12, 2016
A simple method for the high-yield preparation of (NH4)2[Re2F8]·2H2O has been developed that invo... more A simple method for the high-yield preparation of (NH4)2[Re2F8]·2H2O has been developed that involves the reaction of (n-Bu4N)2[Re2Cl8] with molten ammonium bifluoride (NH4HF2). Using this method, the new salt [NH4]2[Re2F8]·2H2O was prepared in ∼90% yield. The product was characterized in solution by ultraviolet-visible light (UV-vis) and (19)F nuclear magnetic resonance ((19)F NMR) spectroscopies and in the solid-state by elemental analysis, powder X-ray diffraction (XRD), and infrared (IR) spectroscopy. Multiconfigurational CASSCF/CASPT2 quantum chemical calculations were performed to investigate the molecular and electronic structure, as well as the electronic absorption spectrum of the [Re2F8](2-) anion. The metal-metal bonding in the Re2(6+) unit was quantified in terms of effective bond order (EBO) and compared to that of its [Re2Cl8](2-) and [Re2Br8](2-) analogues.
Thin, highly reflective rhodium films with metal compositions greater than 98% (elemental weight ... more Thin, highly reflective rhodium films with metal compositions greater than 98% (elemental weight percentage) have been deposited by chemical vapor deposition using Rh(allyl){sub 3} (allyl = {eta}{sup 3}-C{sub 3}H{sub 5}) in the presence of a hydrogen plasma. Uniform, crystalline films that adhere well to several types of substrates result from depositions at temperatures as low as 150{degrees}C. Depositions using H{sub 2} (no plasma), or an argon plasma yields material that is amorphous, contains a significant amount (>14%) of residual carbon, and has a dramatically slower growth rate. The composition of these materials does not vary significantly from that of the materials obtained from the in vacuo thermal deposition with Rh(allyl){sub 3}. 23 refs.
Nuclear Medicine and Biology, 2010
Tricarbonylrhenium(I) complexes with a bidentate ligand N-methyl-2pyridinecarboxyamide (LH), [Re(... more Tricarbonylrhenium(I) complexes with a bidentate ligand N-methyl-2pyridinecarboxyamide (LH), [Re(CO) 3 (LH)H 2 O] + and [Re(CO) 3 (LH)Br], were prepared. The first complex was synthesized for rhenium radioisotope (Re-188). The second compound in the form of yellow crystals was obtained for stable, nonradioactive rhenium. The exchange of bromide ion and water molecule in these complexes for imidazol (im) was studied. It was appeared that imidazol quickly replaces the monodentate ligand. Single-crystal X-ray diffraction measurements showed flexidentate behaviour of N-methyl-2pyridinecarboxyamide which coordinates as neutral N,O-donor in [Re(CO) 3 LH NO Br] and as anionic N,N-donor in [Re(CO) 3 L NN (im)]. This interesting feature of that ligand offers an attractive perspectives to obtain mixed tricarbonylrhenium(I) complexes with bidentate and different monodentate ligands, what could be very important for nuclear medicine applications.
ChemInform, 2014
ABSTRACT Review: [preparation, solid state and electronic structures, and spectroscopic propertie... more ABSTRACT Review: [preparation, solid state and electronic structures, and spectroscopic properties of (Bu4N)2Tc2X8, Tc2(OAc)4X2, Tc2(OAc)2Cl4, cesium salts of Tc2X83-, and Tc2X4(PMe3)4 (X: Cl, Br); 38 refs.
This patent describes a nanocrystalline film, it comprises: a substantially carbon-free metal sel... more This patent describes a nanocrystalline film, it comprises: a substantially carbon-free metal selected from the group consisting of rhodium, iridium, molybdenum, tungsten, rhenium, platinum, or palladium.