A series of novel heteropolynuclear complexes of Ln (II1)-Cu (I1) and Cu(11) complex with noncyclic polyether Schiff base, salicylidene diethylene glycol diarnine (SALDA), have been synthesized for the first time. The...A series of novel heteropolynuclear complexes of Ln (II1)-Cu (I1) and Cu(11) complex with noncyclic polyether Schiff base, salicylidene diethylene glycol diarnine (SALDA), have been synthesized for the first time. The isolated complexes are formulated as [LnCu2(SALDAI3(NO3)5](N03)2.4H20 (Ln = La, Pr, Nd, Sm, Gd, Tb, Er, Yb, Y) and [Cu(SALDA)(NO3)](NO3). H20. Synthesis methods are reported herein. The differences in their compositions, structures and coordination have been investigated by UV, IR, magnetic susceptibility, especially by1H and13c NMR spectra. It has been found that v (C=N) in the Ln(II1)-Cu(II) complexes are split up into two peaks with a far distance and it may be used as a probe for distinguishing them from others. In addition, it is suggested that the ethereal oxygen donors are not all coordinated. The good catalysis effect for the polymerization of methyl methacrylate (MMA) are reported for the first time. The results show that the catalytic activity of Nd-Cu-SALDA complex is better than that of the others and its syndiotactic sequence is ～ 72 % as well, the conversion íncreases to 88%.展开更多
A novel Schiff base (TAMET) was synthesized by the condensation of tetraglycol aldehyde with methionine and a mild oxidant CrO3. (C5H5N)2 was selected for the reaction. Seven new rare earth complexes with this Schiff ...A novel Schiff base (TAMET) was synthesized by the condensation of tetraglycol aldehyde with methionine and a mild oxidant CrO3. (C5H5N)2 was selected for the reaction. Seven new rare earth complexes with this Schiff base have been synthesized and characterized by elemental analysis, TG-DTA, molar Conductivity, magnetic susceptibility and IR, especially 1H NMR spectra. Information was obtained from reflectance spectra and the coordination of sulfur atom to rare earths was discussed. The experimental results show that these compounds have some biological activity and could dispose of O2?-.展开更多
文摘A series of novel heteropolynuclear complexes of Ln (II1)-Cu (I1) and Cu(11) complex with noncyclic polyether Schiff base, salicylidene diethylene glycol diarnine (SALDA), have been synthesized for the first time. The isolated complexes are formulated as [LnCu2(SALDAI3(NO3)5](N03)2.4H20 (Ln = La, Pr, Nd, Sm, Gd, Tb, Er, Yb, Y) and [Cu(SALDA)(NO3)](NO3). H20. Synthesis methods are reported herein. The differences in their compositions, structures and coordination have been investigated by UV, IR, magnetic susceptibility, especially by1H and13c NMR spectra. It has been found that v (C=N) in the Ln(II1)-Cu(II) complexes are split up into two peaks with a far distance and it may be used as a probe for distinguishing them from others. In addition, it is suggested that the ethereal oxygen donors are not all coordinated. The good catalysis effect for the polymerization of methyl methacrylate (MMA) are reported for the first time. The results show that the catalytic activity of Nd-Cu-SALDA complex is better than that of the others and its syndiotactic sequence is ～ 72 % as well, the conversion íncreases to 88%.
基金Project supported by the National Natural Science Foundation of China (No. 29671026)the Natural Science Foundation of Zhejiang Province (No. 296062)the State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics (No. 971502)
文摘A novel Schiff base (TAMET) was synthesized by the condensation of tetraglycol aldehyde with methionine and a mild oxidant CrO3. (C5H5N)2 was selected for the reaction. Seven new rare earth complexes with this Schiff base have been synthesized and characterized by elemental analysis, TG-DTA, molar Conductivity, magnetic susceptibility and IR, especially 1H NMR spectra. Information was obtained from reflectance spectra and the coordination of sulfur atom to rare earths was discussed. The experimental results show that these compounds have some biological activity and could dispose of O2?-.
