VO(II)-脯氨酸-邻菲咯啉三元体系的溶液结构及其波谱

本文测定了VOSO4与脯氨酸(Pro)、邻菲咯啉(Phen)在不同酸度(pH=1～14)的乙二醇/水(1:1)溶液中的低温(173K)EPR波谱,根据不同pH下的EPR谱变化,利用Johnson的加合规则,并结合配合物的红外光谱推测了它们的可能结构.利用波谱参数计算了配合物的键参数,利用电子光谱数据计算了配合物的晶体场参数,讨论了它们的成配特性.结果表明,随着取代水分子的配体(Phen或Pro)数目增加,键参数减小,配合物共价性增强,同时得出Phen与VO(II)配位能力比Pro强得多.     

VO(Ⅱ)-脯氨酸-邻菲咯啉三元体系的溶液结构及其波谱

本文测定了ＶＯＳＯ_４与脯氨酸（Ｐｒｏ）、邻菲咯啉（Ｐｈｅｎ）在不同酸度（ｐＨ＝１～１４）的乙二醇／水（１：１）溶液中的低温（１７３Ｋ）ＥＰＲ波谱,根据不同ｐＨ下的ＥＰＲ谱变化,利用Ｊｏｈｎｓｏｎ的加合规则,并结合配合物的红外光谱推测了它们的可能结构。利用波谱参数计算了配合物的键参数,利用电子光谱数据计算了配合物的晶体场参数,讨论了它们的成配特性。结果表明,随着取代水分子的配体（Ｐｈｅｎ或Ｐｒｏ）数目增加,键参数减小,配合物共价性增强,同时得出Ｐｈｅｎ与ＶＯ（Ⅱ）配位能力比Ｐｒｏ强得多。     

水杨醛缩L-天冬氨酸过渡金属配合物的合成及表征

合成了新的水杨醛天冬氨酸席夫碱配体及其铜、锌、钴、镍配合物,并利用元素分析、摩尔电导、热分析、红外光谱、电子光谱及顺磁共振等手段进行表征,确定配合物的化学组成为K［ML］·nH₂O,式中L=C₁₁H₇NO, M=Cu²⁺、Zn²⁺、Co²⁺、Ni²⁺,相应地n=2、2、3、7/2。     

锂离子电池正极材料Fe3+掺杂Li1+xV3O8的制备与电化学性能

采用柠檬酸辅助的溶胶-凝胶法制备了Fe^3＋掺杂Li1.1Fe0.05V2．95O8及对比样品LiV3O8正极材料．使用TG—DTA、XRD、FT-IR等手段表征了正极材料的物理化学特性,并采用EIS、恒电流充放电等手段研究了其电化学性能．结果表明：Fe^3＋掺杂LiV3O8与对比LiV3O8相比,能在更低的温度下晶化,能在相同温度、相同时间煅烧下保持更小的晶粒度．Li1.1Fe0.05V2．95O8与对比LiV308相比,特别是大电流下的放电容量有较大的提高,在75mA·g^-1,197mA·g^-1,373mA·g^-1及重新回到75mA·g^-1电流下的初始放电容量分别是307mAh·g^-1,237mAh·g^-1．162mAh·g^-1和302mAh·g^-1．在回复到75mA·g^-1电流后放电容量能非常稳定保持在278．6mAh·g^-1左右,并同时给出了初步的理论解释．     

水杨醛天冬氨酸过渡金属配合物的ESR波谱及抗O_2~(·-)性能

测定了水杨醛天冬氨酸Cu（Ⅱ）配合物在室温和低温下吡啶中的溶液ESR谱,室温溶液谱观测到二级效应和弛豫效应,给予了理论解释,计算了弛豫参数;根据低温ESR波谱参数,计算了键参数,讨论了配合物的成键特性和稳定性。利用ESR法直接测定了水杨醛天冬氨酸席夫碱配体及其钢、锌、钻、镍配合物抗O2-性能,结果表明：配体和配合物均有抗O2-性能,配合物清除能力比配体强,其中铜配合物清除O2-能力最强。     

水杨醛酪氨酸铜配合物合成和EPR波谱

A new Schiff base derived from tyrosine and salicylidene and its copper(Ⅱ) complex have been synthesized and characterized by elemental analyses,molar conductances,thermal analyses,infrared spectra,electronic spectra and EPR spectra.The composition of the complex is K[CuL(Ac)]•H2O, where L=H13C16NO4. EPR spectra of the copper(Ⅱ) complex were investigated in various solvents at different temperatures.It is found that the linewidth of four hyperfine lines on solution spectra at room temperature is unequal and changes with mⅠ ,this could be satisfactorily explained by the relaxation effect.The relaxation time and the relaxation rate were calculated.By using spectral parameters from solution spectra at low temperature,the bonding parameters of Cu(Ⅱ) complex were calculated.The bonding characterization and stability of the complex were disscussed.The results show that the in plane 螵瞓ond and the in plane 皙瞓ond in the complex all play an important role.     

水杨醛酪氨酸铜配合物合成和EPR波谱

A new Schiff base derived from tyrosine and salicylidene and its copper(Ⅱ ) complex have been synthesized and characterized by elemental analyses,molar conductances,thermal analyses,infrared spectra,electronic spectra and EPR spectra.The composition of the complex is K[CuL(Ac)]· H2O, where L=H13C16NO4.EPR spectra of the copper(Ⅱ) complex were investigated in various solvents at different temperatures.It is found that the linewidth of four hyperfine lines on solution spectra at room temperature is unequal and changes with mⅠ ,this could be satisfactorily explained by the relaxation effect.The relaxation time and the relaxation rate were calculated.By using spectral parameters from solution spectra at low temperature,the bonding parameters of Cu(Ⅱ ) complex were calculated.The bonding characterization and stability of the complex were disscussed.The results show that the in-plane σ -bond and the in-plane π -bond in the complex all play an important role.     

水杨醛天冬氨酸过渡金属配合物的ESR波谱及抗O2·-性能

测定了水杨醛天冬氨酸Cu(Ⅱ)配合物在室温和低温下吡啶中的溶液ESR谱,室浊溶液谱观测到二级效应和驰豫效应,给予了理论解释,计算了弛豫参数;根据低温ESR波谱参数,计算了键参数,讨论了配合物的成键特性和稳定性。利用ESR法直接测定了水杨醛天冬氨酸席夫碱配体及其铜、锌、钴、镍配合物抗O2性能,结果表明：配体和配合物均有抗O2^-性能,配生物清除能力比配体强,其中铜配合物清除O^-2能力最强。     

ESR spectra studies of Cu(Ⅱ) 2,4-dihydroxybenzaldehyde tyrosine complex

A novel Schiff base derived from 2,4-dihydroxybenzaldehyde and tyrosine and its copper(Ⅱ)complex have been synthesized and characterized.The composition of the complex is K[CuL] H2O,where L=H11C16NO5.ESR spectra of the copper(Ⅱ)complex were investigated at different temperatures and in various solvents.The second order effect and the relaxation effect were observed in the solution spectrum at room temperature,which was satisfactorily explained by spin Hamiltonian.The bonding parameters of copper(Ⅱ)complex were calculated using spectral parameters from ESR spectra at low temperature.Its bonding characterization and stability were disscussed.The result shows that the in-plane a-bond and the in-plane π-bond in the complex all play an important role.     

Synthesis, Characterization and Crystal Structure of (2,2′-Bipyridine)(μ-maleato)copper(II) Dihydrate

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｐａｓｔｄｅｃａｄｅ ,ａｌｏｔｏｆｉｎｔｅｒｅｓｔｈａｓｂｅｅｎｃｏｎ ｃｅｎｔｒａｔｅｄｏｎｐｒｅｐａｒｉｎｇａｎｄｃｈａｒａｃｔｅｒｉｚｉｎｇｂｒｉｄｇｉｎｇｍｅｔａｌｃｏｍｐｌｅｘｅｓｆｏｒｉｎｖｅｓｔｉｇａｔｉｎｇｔｈｅｉｒｐｏｔｅｎｔｉａｌｌｙｕｓｅｆｕｌｅｌｅｃ ｔｒｏｎｉｃｏｒｍａｇｎｅｔｉｃｐｒｏｐｅｒｔｉｅｓ .1,2 Ｒｅｃｅｎｔｌｙ ,ｓｅｖｅｒａｌｍｅｔａｌｃｏｍｐｌｅｘｅｓｂｒｉｄｇｅｄｂｙｄｉｃａｒｂｏｘｙｌａｔｅｈａｖｅｂｅｅｎｓｙｎｔｈｅｓ…