NATURE OF THE LOWEST ENERGY EXCITED-STATE OF A BIS-PHENANTHROLINE [2]-CATENAND AND ITS CU(I), AG(I) AND CO(II) COMPLEXES

被引:26
作者
ARMAROLI, N
RODGERS, MAJ
CERONI, P
BALZANI, V
DIETRICHBUCHECKER, CO
KERN, JM
BAILAL, A
SAUVAGE, JP
机构
[1] UNIV BOLOGNA,DIPARTIMENTO CHIM G CIAMICIAN,I-40126 BOLOGNA,ITALY
[2] UNIV STRASBOURG 1,INST LE BEL,CHIM ORGANOMINERALE LAB,F-67070 STRASBOURG,FRANCE
关键词
D O I
10.1016/0009-2614(95)00666-R
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The excited state absorption and emission spectra and lifetimes of a [2]-cantenand made of two interlocked 30-membered rings (containing 2,9-dianisyl-1,10-phenanthroline-type coordinating moieties) and its Co2+, Cu+, and Ag+ complexes have been investigated in CH2Cl2 solution. The lowest energy excited state is established to be a triplet ligand-centered level for the Ag+ complex and a triplet metal-to-ligand charge-transfer level for the Cu+ complex. For the Co2+ complex, where no emission or transient absorption can be observed, the lowest excited state is most likely to be a distorted triplet metal-centered level. No transient absorption can be observed for the lowest energy triplet excited state of the [2]-catenand in CH2Cl2 solution because of a fast reaction with solvent molecules.
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页码:555 / 558
页数:4
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