The title complex 1, C28H26CoN4O2, crystallizes in the triclinic system, space group P with a = 9.506(3), b = 9.506(3), c = 14.837(5) ? a = 106.397(5), b = 106.012(5), g = 91.889(6), V = 1217.7(7) 3, Z = 2, Dc =1.390 ...The title complex 1, C28H26CoN4O2, crystallizes in the triclinic system, space group P with a = 9.506(3), b = 9.506(3), c = 14.837(5) ? a = 106.397(5), b = 106.012(5), g = 91.889(6), V = 1217.7(7) 3, Z = 2, Dc =1.390 g/cm3, Mr = 509.46, F(000) = 530, m(MoKa) = 0.738 mm-1, the final R = 0.0359 and wR = 0.0951 for 4275 observed reflections with I > 2s(I). The complex adopts a distorted tetrahedral coordination sphere around the cobalt atom.展开更多
This paper presents the complete energy matrix of the 3d2system containing the electron-electron interaction, the ligand-fieldinteraction, the spin-orbit coupling interaction, and the Zeeman interaction, in which the ...This paper presents the complete energy matrix of the 3d2system containing the electron-electron interaction, the ligand-fieldinteraction, the spin-orbit coupling interaction, and the Zeeman interaction, in which the optical spectra and g-factor of V3+andTi2+ions in the series of tetrahedral AIIBVI(AII=Zn, Cd, BVI=S, Se, Te) semiconductor materials are determined. In the inves-tigation of the optical and magnetic properties of these transition-metal ions in the tetrahedral coordination complexes, wecompared the data obtained from the transition-metal ions in the tetrahedral coordination complexes with those obtained fromthe corresponding ions in the octahedral ones, and found that the tetrahedral complexes have weaker crystal-field strength, in-verse energy level ordering and stronger covalence effect.展开更多
Incorporation of heteroatoms into the framewo rk of zeolites has become a significant strategy to improve their performance in catalysis and adsorption,because the obtained heteroatom zeolites exhibit quite different ...Incorporation of heteroatoms into the framewo rk of zeolites has become a significant strategy to improve their performance in catalysis and adsorption,because the obtained heteroatom zeolites exhibit quite different properties from the conventional aluminosilicate zeolites in aspects of surface acidity,pore structures,particle size and so on.In this review,the progress on the heteroatom zeolites including their synthesis and application is highlighted.First,the recent advance on the design and synthesis of different heteroatom zeolites is summarized.Special emphasis is placed on the introduction and comparison of three typical methods,including the direct synthesis,post synthesis and improved direct synthesis,for the traditional heteroatom zeolites(such as TS-1,Sn-MFI,Sn-β) and newly-reported heteroatom zeolites(such as W-MFI,Mo-MFI).According to their intrinsic characteristics,the application of heteroatom zeolites in diverse fields,such as production of fine chemicals,air pollution control and biomass conversion is then discussed.Finally,the challenges and perspective on the future development of heteroatom zeolites in low-cost preparation and practical application are proposed.展开更多
基金This work was supported by the National Natural Science Foundation of China (No. 20272062)
文摘The title complex 1, C28H26CoN4O2, crystallizes in the triclinic system, space group P with a = 9.506(3), b = 9.506(3), c = 14.837(5) ? a = 106.397(5), b = 106.012(5), g = 91.889(6), V = 1217.7(7) 3, Z = 2, Dc =1.390 g/cm3, Mr = 509.46, F(000) = 530, m(MoKa) = 0.738 mm-1, the final R = 0.0359 and wR = 0.0951 for 4275 observed reflections with I > 2s(I). The complex adopts a distorted tetrahedral coordination sphere around the cobalt atom.
基金supported by the National Natural Science Foundation of China (Grant Nos. 10974138 and 10774103)
文摘This paper presents the complete energy matrix of the 3d2system containing the electron-electron interaction, the ligand-fieldinteraction, the spin-orbit coupling interaction, and the Zeeman interaction, in which the optical spectra and g-factor of V3+andTi2+ions in the series of tetrahedral AIIBVI(AII=Zn, Cd, BVI=S, Se, Te) semiconductor materials are determined. In the inves-tigation of the optical and magnetic properties of these transition-metal ions in the tetrahedral coordination complexes, wecompared the data obtained from the transition-metal ions in the tetrahedral coordination complexes with those obtained fromthe corresponding ions in the octahedral ones, and found that the tetrahedral complexes have weaker crystal-field strength, in-verse energy level ordering and stronger covalence effect.
基金supported by the National Natural Science Foundation of China(Nos.21875044,21673048)Key Basic Research Program of Science and Technology Commission of Shanghai Municipality(No.17JC1400100)+2 种基金the support by the state key laboratory of Transducer Technology of China(No.SKT1904)Program of Shanghai Academic Research Leader(No.19XD1420300)Research Supporting Project(No.RSP-2019/155)by King Saud University。
文摘Incorporation of heteroatoms into the framewo rk of zeolites has become a significant strategy to improve their performance in catalysis and adsorption,because the obtained heteroatom zeolites exhibit quite different properties from the conventional aluminosilicate zeolites in aspects of surface acidity,pore structures,particle size and so on.In this review,the progress on the heteroatom zeolites including their synthesis and application is highlighted.First,the recent advance on the design and synthesis of different heteroatom zeolites is summarized.Special emphasis is placed on the introduction and comparison of three typical methods,including the direct synthesis,post synthesis and improved direct synthesis,for the traditional heteroatom zeolites(such as TS-1,Sn-MFI,Sn-β) and newly-reported heteroatom zeolites(such as W-MFI,Mo-MFI).According to their intrinsic characteristics,the application of heteroatom zeolites in diverse fields,such as production of fine chemicals,air pollution control and biomass conversion is then discussed.Finally,the challenges and perspective on the future development of heteroatom zeolites in low-cost preparation and practical application are proposed.
