摘要
合成了直链醚 -组氨酸 Schiff碱 (四甘醇醛缩双组氨酸 Schiff碱 )及其稀土配合物 ,以元素分析、红外光谱、热重、磁化率等确定配合物组成为 Ln3( H2 L) 2 ( NO3) 9( Ln=La,Nd,Gd,Er,Yb;L=C2 0 H2 6 N6 O7) .采用交叉极化结合魔角旋转技术 ( CP/ MAS)和消除旋转边带技术 ( TOSS) ,获得固体高分辨 1 3 C NMR谱 ,见到— COO- 的 1 3 C谱峰分裂等新信息 .结合液体 1 H NMR谱等 ,对 L -组氨酸中咪唑基的配位进行了研究 .以EPR波谱探讨了配合物的晶体场强等特性 .观察到 Er配合物对超氧阴离子自由基的清除有一定效果 .
Five lanthanide complexes with tetraglycol aldehyde bis histidine Schiff base were synthesized and characterized by elemental analysis, IR spectrometry, TG DTA and magnetic susceptibility as Ln 3(H 2L) 2(NO 3) 9(Ln=La,Nd,Gd,Er,Yb; L=C 20 H 26 N 6O 7). The obtained complexes were investigated in detail by high resolution solid state(HRSS) 13 C NMR using cross polarization,magic angle spinning(CP/MAS)and total suppression of sidebands(TOSS) techniques. Some new information about the splitting peaks of 13 C for —COO - group are given. On the basis of them,the coordination of imidazole group was discussed. The crystal field strength of the Gd(Ⅲ) complex was investigated by EPR spectrometry. The experimental results show that Er 3+ complex has some biological activities and could dispose of O ·- 2.
出处
《应用化学》
CAS
CSCD
北大核心
2001年第1期1-4,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金! (2 96 710 2 6 )
浙江省自然科学基金! (2 96 0 6 2 )
波谱与原子分子物理国家重点实验室资助
