The title compound (C5N5H41P2Mo5O30.5) was synthesized under hydrothermal condition and its crystal structure was determined by X-ray diffraction. It belongs to triclinic system, space group P , with a=9.9645(6), b=10...The title compound (C5N5H41P2Mo5O30.5) was synthesized under hydrothermal condition and its crystal structure was determined by X-ray diffraction. It belongs to triclinic system, space group P , with a=9.9645(6), b=10.8666(7), c=15.814(1)? α=71.482(3), β=88.528(2), γ=78.448(2)°, V=1589.4(2)3, Dc=2.510g/cm3, Z=2,μ=2.138mm-1,λ(MoKα) = 0.71073 ? F(000)=1180. The final R and wR were 0.0396 and 0.1052 for 6626 observed reflections with I ≥2σ(I), respectively. The result of the structure analysis indicates that the [Mo5O15(PO4) (HPO4)]5- anion in the title compound consists of five edge-sharing or corner-sharing MoO6 octahedra and two corner-sharing PO4 tetrahedra. Each MoO6 octahedron adopts distorted octahedral geometry.展开更多
Presented here are two isostructural uranyl coordination polymers [UOe（EDO）（H2O）]· H2O （1） and [UO2（BDO）（H2O）]-2H2O （2） （EDO2---ethylene-1,2-dioxamate; BDO2 =butylene-1,2-dioxamate） with identical s...Presented here are two isostructural uranyl coordination polymers [UOe（EDO）（H2O）]· H2O （1） and [UO2（BDO）（H2O）]-2H2O （2） （EDO2---ethylene-1,2-dioxamate; BDO2 =butylene-1,2-dioxamate） with identical stepwise zigzag chain structure and distinct interchain hydrogen bonding interaction, prepared from hydrothermal reaction of DEEDO or DEBDO （DEEDO- diethyl ethylene-1,2-dioxamate; DEBDO--diethyl butylene-l,2-dioxamate） with uranyl ions. The monomeric uranyl-based fluorescence emissions of compounds 1 and 2 are red-shifted by about 6 and 5 nm respectively, compared to that of uranyl nitrate hexahydrate. Compound 1 has stronger emission than compound 2, but both their emissions exhibit triple-exponential decay. The photophysics of uranyl oxalate trihydrate was also investigated for comparison. The selective crystallization of compound 1 in alkaline solution was applied to the sequestration of uranyl ions, showing a kinetic preference.展开更多
基金The paper is financially supported by NSF of Fujian Province (JA00137) by FPNSFC(E0110013)
文摘The title compound (C5N5H41P2Mo5O30.5) was synthesized under hydrothermal condition and its crystal structure was determined by X-ray diffraction. It belongs to triclinic system, space group P , with a=9.9645(6), b=10.8666(7), c=15.814(1)? α=71.482(3), β=88.528(2), γ=78.448(2)°, V=1589.4(2)3, Dc=2.510g/cm3, Z=2,μ=2.138mm-1,λ(MoKα) = 0.71073 ? F(000)=1180. The final R and wR were 0.0396 and 0.1052 for 6626 observed reflections with I ≥2σ(I), respectively. The result of the structure analysis indicates that the [Mo5O15(PO4) (HPO4)]5- anion in the title compound consists of five edge-sharing or corner-sharing MoO6 octahedra and two corner-sharing PO4 tetrahedra. Each MoO6 octahedron adopts distorted octahedral geometry.
基金supported by the National Natural Science Foundation of China (21431002)the Specialized Research Fund for the Doctoral Program of Higher Education (20110211130002)
文摘Presented here are two isostructural uranyl coordination polymers [UOe（EDO）（H2O）]· H2O （1） and [UO2（BDO）（H2O）]-2H2O （2） （EDO2---ethylene-1,2-dioxamate; BDO2 =butylene-1,2-dioxamate） with identical stepwise zigzag chain structure and distinct interchain hydrogen bonding interaction, prepared from hydrothermal reaction of DEEDO or DEBDO （DEEDO- diethyl ethylene-1,2-dioxamate; DEBDO--diethyl butylene-l,2-dioxamate） with uranyl ions. The monomeric uranyl-based fluorescence emissions of compounds 1 and 2 are red-shifted by about 6 and 5 nm respectively, compared to that of uranyl nitrate hexahydrate. Compound 1 has stronger emission than compound 2, but both their emissions exhibit triple-exponential decay. The photophysics of uranyl oxalate trihydrate was also investigated for comparison. The selective crystallization of compound 1 in alkaline solution was applied to the sequestration of uranyl ions, showing a kinetic preference.
