EPR spectra of three new quaternary gadolinium complexes(I： [Gd(C6H5COO)2(NO3)(bipy)]2,Ⅱ： [Gd(m- CH3C6H4COO)2(NO3)(phen)]2 andⅢ： [Gd(p- CH3C6H4COO)(NO3)(phen)]2) with mixed anion ligands in polycrystalline powder...EPR spectra of three new quaternary gadolinium complexes(I： [Gd(C6H5COO)2(NO3)(bipy)]2,Ⅱ： [Gd(m- CH3C6H4COO)2(NO3)(phen)]2 andⅢ： [Gd(p- CH3C6H4COO)(NO3)(phen)]2) with mixed anion ligands in polycrystalline powders and solutions have been investigated at different temperatures and solvents.New behavior of EPR spectra of complexⅢ was first observed in polycrystalline powder at 77K and three types of EPR spectra for three complexes,symmetry resonance spectrum for the complexⅡ ,U spectrum for the complexⅢ ,and asymmetry resonance spectrum for the complex I.The relationship of EPR features between the crystal- field strength in the complexes and local symmetry around Gd(Ⅲ ) was discussed.The crystal- field parameters b20 and asymmetry parametersλ′ of the complexes I andⅢ were estimated.展开更多
The quaternary complex, [Ce（CH2ClCOO）2（NO3）（phen）（H2O）]2, was synthesized. Interestedly, the title compound is a dimer comparing with the 1D polymer [La（CH2ClCOO）2（NO3）（phen）·（H2O）]n and powder co...The quaternary complex, [Ce（CH2ClCOO）2（NO3）（phen）（H2O）]2, was synthesized. Interestedly, the title compound is a dimer comparing with the 1D polymer [La（CH2ClCOO）2（NO3）（phen）·（H2O）]n and powder compound [Nd（CH2ClCOO）2（NO3）（phen）]. In the title compound there is a monodentate NO-3, which is a first example in the all synthesized quaternary mixed anion complexes, and the NO-3 extended the complex into a 2D network with water from other molecules by inter-molecular hydrogen bonds. The intermolecular hydrogen bonds lead to the weaker Ce—O（COO）, Ce—O（NO3） and Ce—N bonds comparing with other quaternary mixed anion complexes of cerium. Also the stacking effect, which makes the compound more stable in the situation of weaker Ce—O and Ce—N bonds, was first found in the series compounds.展开更多
A new complex with mixed￡-quadriliga ndCe ￡¨CH ￡2 ￡1/2C(CH￡3￡(c)￡-COO￡(c)￡2￡¨NO￡3￡(c)￡¨phen￡(c)2 has been synthesized in aqueous solution of slight acidity a nd characterized by elementary...A new complex with mixed￡-quadriliga ndCe ￡¨CH ￡2 ￡1/2C(CH￡3￡(c)￡-COO￡(c)￡2￡¨NO￡3￡(c)￡¨phen￡(c)2 has been synthesized in aqueous solution of slight acidity a nd characterized by elementary analysis￡?IR and TGA￡(r)The crystal structu re determination shows that the comple x belongs to triclinic￡?space groupP￡±￡?a￡1/2￡1￡(r)￡?￡±￡′|!￡?b￡1/2￡±￡°￡(r)￡°￡′￡*|!￡?c￡1/2￡±￡±￡(r)￡?￡2￡±|!￡?Z ￡1/2￡2￡?|á￡1/2￡±￡°￡°￡(r)￡?￡?￡¨￡3￡(c)??￡?|?￡1/2106￡(r)￡2￡1￡¨￡3￡(c)??￡?|?￡1/2￡1￡*￡(r)￡1￡3￡¨￡2￡(c)??￡?V￡1/2￡±￡°￡μ￡′￡¨￡μ￡(c)?3,Dc￡1/2￡±￡(r)741g·cm-￡3￡?F￡¨￡°￡°￡°￡(c)￡1/2￡μ￡′￡?￡(r)￡°￡°￡?|ì￡¨Mo K|á￡(c)￡1/2￡2￡2￡(r)06cm-￡± ￡(r)And the crystal is consisted of a bin uclear molecule￡(r)The coordina-tion of Ce 3? is nine￡(r)展开更多
用海藻酸钠(Sodium Alginate,SA)将四酰胺基大环铁配合物(FeⅢ-TAML)固定在热解石墨电极表面,制成FeⅢ-TAML/SA膜修饰电极。交流阻抗结果显示FeⅢ-TAML可以很好的固定在SA膜中。包埋在SA膜中的FeⅢ-TAML在磷酸盐缓冲溶液(PBS)和乙醇混...用海藻酸钠(Sodium Alginate,SA)将四酰胺基大环铁配合物(FeⅢ-TAML)固定在热解石墨电极表面,制成FeⅢ-TAML/SA膜修饰电极。交流阻抗结果显示FeⅢ-TAML可以很好的固定在SA膜中。包埋在SA膜中的FeⅢ-TAML在磷酸盐缓冲溶液(PBS)和乙醇混合溶液中与电极直接传递电子,得到一对基于Fe(Ⅲ)/Fe(Ⅱ)电对的氧化还原峰,其峰为-0.085V和0.001V(V vs SCE)。研究了扫速及电解质pH值对FeⅢ-TAML的影响,其电化学反应是受表面控制的电极过程,其电势随着PBSpH值的增加而负移且成线性关系,直线斜率为-49.86mV·pH–1,说明FeⅢ-TAML的电子传递过程中伴有质子转移。展开更多
The title compound[Co(2,2-bipy) 3] 4[Mo 10V 6O 40(PO 4)] 2·4H 2O was synthesized by hydrothermal method and its structure was determined with single crystal X-ray analysis. The cluster anion is double tetracapped...The title compound[Co(2,2-bipy) 3] 4[Mo 10V 6O 40(PO 4)] 2·4H 2O was synthesized by hydrothermal method and its structure was determined with single crystal X-ray analysis. The cluster anion is double tetracapped Pseudo-Keggin cluster anions. The crystal is triclinic, space group P-1 with a=\{1\^316 5(3)\} nm, b=1\^438 2(3) nm, c=2\^764 4(6) nm, α=79\^51°, β=89\^95°, γ=68\^89°, V=\{4\^789 3(17)\} nm 3, Z=1, D c=2\^176 g/cm 3, R=0\^075 5, wR=0\^205 3, S=0\^995.展开更多
文摘EPR spectra of three new quaternary gadolinium complexes(I： [Gd(C6H5COO)2(NO3)(bipy)]2,Ⅱ： [Gd(m- CH3C6H4COO)2(NO3)(phen)]2 andⅢ： [Gd(p- CH3C6H4COO)(NO3)(phen)]2) with mixed anion ligands in polycrystalline powders and solutions have been investigated at different temperatures and solvents.New behavior of EPR spectra of complexⅢ was first observed in polycrystalline powder at 77K and three types of EPR spectra for three complexes,symmetry resonance spectrum for the complexⅡ ,U spectrum for the complexⅢ ,and asymmetry resonance spectrum for the complex I.The relationship of EPR features between the crystal- field strength in the complexes and local symmetry around Gd(Ⅲ ) was discussed.The crystal- field parameters b20 and asymmetry parametersλ′ of the complexes I andⅢ were estimated.
文摘The quaternary complex, [Ce（CH2ClCOO）2（NO3）（phen）（H2O）]2, was synthesized. Interestedly, the title compound is a dimer comparing with the 1D polymer [La（CH2ClCOO）2（NO3）（phen）·（H2O）]n and powder compound [Nd（CH2ClCOO）2（NO3）（phen）]. In the title compound there is a monodentate NO-3, which is a first example in the all synthesized quaternary mixed anion complexes, and the NO-3 extended the complex into a 2D network with water from other molecules by inter-molecular hydrogen bonds. The intermolecular hydrogen bonds lead to the weaker Ce—O（COO）, Ce—O（NO3） and Ce—N bonds comparing with other quaternary mixed anion complexes of cerium. Also the stacking effect, which makes the compound more stable in the situation of weaker Ce—O and Ce—N bonds, was first found in the series compounds.
基金The Education Department of Inner Mongolia Science Foundation (NJ 06047)Inner Mongolia University"513"Second Administrative Levels Person with Ability Foundation Project (205150)~~
文摘A new complex with mixed￡-quadriliga ndCe ￡¨CH ￡2 ￡1/2C(CH￡3￡(c)￡-COO￡(c)￡2￡¨NO￡3￡(c)￡¨phen￡(c)2 has been synthesized in aqueous solution of slight acidity a nd characterized by elementary analysis￡?IR and TGA￡(r)The crystal structu re determination shows that the comple x belongs to triclinic￡?space groupP￡±￡?a￡1/2￡1￡(r)￡?￡±￡′|!￡?b￡1/2￡±￡°￡(r)￡°￡′￡*|!￡?c￡1/2￡±￡±￡(r)￡?￡2￡±|!￡?Z ￡1/2￡2￡?|á￡1/2￡±￡°￡°￡(r)￡?￡?￡¨￡3￡(c)??￡?|?￡1/2106￡(r)￡2￡1￡¨￡3￡(c)??￡?|?￡1/2￡1￡*￡(r)￡1￡3￡¨￡2￡(c)??￡?V￡1/2￡±￡°￡μ￡′￡¨￡μ￡(c)?3,Dc￡1/2￡±￡(r)741g·cm-￡3￡?F￡¨￡°￡°￡°￡(c)￡1/2￡μ￡′￡?￡(r)￡°￡°￡?|ì￡¨Mo K|á￡(c)￡1/2￡2￡2￡(r)06cm-￡± ￡(r)And the crystal is consisted of a bin uclear molecule￡(r)The coordina-tion of Ce 3? is nine￡(r)
文摘用海藻酸钠(Sodium Alginate,SA)将四酰胺基大环铁配合物(FeⅢ-TAML)固定在热解石墨电极表面,制成FeⅢ-TAML/SA膜修饰电极。交流阻抗结果显示FeⅢ-TAML可以很好的固定在SA膜中。包埋在SA膜中的FeⅢ-TAML在磷酸盐缓冲溶液(PBS)和乙醇混合溶液中与电极直接传递电子,得到一对基于Fe(Ⅲ)/Fe(Ⅱ)电对的氧化还原峰,其峰为-0.085V和0.001V(V vs SCE)。研究了扫速及电解质pH值对FeⅢ-TAML的影响,其电化学反应是受表面控制的电极过程,其电势随着PBSpH值的增加而负移且成线性关系,直线斜率为-49.86mV·pH–1,说明FeⅢ-TAML的电子传递过程中伴有质子转移。
文摘The title compound[Co(2,2-bipy) 3] 4[Mo 10V 6O 40(PO 4)] 2·4H 2O was synthesized by hydrothermal method and its structure was determined with single crystal X-ray analysis. The cluster anion is double tetracapped Pseudo-Keggin cluster anions. The crystal is triclinic, space group P-1 with a=\{1\^316 5(3)\} nm, b=1\^438 2(3) nm, c=2\^764 4(6) nm, α=79\^51°, β=89\^95°, γ=68\^89°, V=\{4\^789 3(17)\} nm 3, Z=1, D c=2\^176 g/cm 3, R=0\^075 5, wR=0\^205 3, S=0\^995.
