New chromotropic behavior of manganese complexes with 1,4,7-triazacyclononane-N,N′,N"-tricarboxylates

被引:14
|
作者
Fukuda, Y [1 ]
Hirota, M [1 ]
Kon-No, M [1 ]
Nakao, A [1 ]
Umezawa, K [1 ]
机构
[1] Ochanomizu Univ, Fac Sci, Dept Chem, Bunkyo Ku, Tokyo 1128610, Japan
关键词
manganese(III) complex; cyclic triamine complexes; solvatochromism; electrochromism; acceptor number;
D O I
10.1016/S0020-1693(02)00953-2
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Synthesis and characterization of a manganese(III) complex containing 1,4,7-triazacyclononane-N,N',N"-tripropionate (taentp) are reported. The complex [Mn(acntp)](II) (1) crystallizes in a hexagonal environment of a facial N3O3 donor set with space group P3c1, apparently violating the Jahn-Teller effect. Complex I is more stable for reduction than the corresponding complex [Mn(tacnta)] (2) where, tacnta is a triacetate homologue of tacntp. Both complexes showed reversible electrochromism in aqueous solutions. In addition, complex I was reversibly reduced in a methanol solution too. They also showed solvatochromism in a variety of solvents. The UV-Vis absorption maxima of the complexes were correlated to the acceptor number of the solvent. (C) 2002 Published by Elsevier Science B.V.
引用
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页码:322 / 326
页数:5
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