SYNTHESIS AND SPECTROSCOPIC PROPERTIES OF PHTHALOCYANINE DIMERS IN SOLUTION

被引:49
作者
FERENCZ, A [1 ]
NEHER, D [1 ]
SCHULZE, M [1 ]
WEGNER, G [1 ]
VIAENE, L [1 ]
DESCHRYVER, FC [1 ]
机构
[1] KATHOLIEKE UNIV LEUVEN,DEPT SCHEIKUNDE,B-3001 HEVERLEE,BELGIUM
关键词
D O I
10.1016/0009-2614(95)00978-D
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
A soluble dimer of a tetra-(methoxy)-tetra-(octyloxy)-substituted silicon phthalocyanine has been prepared. Optical absorption spectra of the compound in solution showed a pronounced solvatochromism, characterized by a rather sharp peak with maximum at 640 nm in aromatic solvents and a broad absorption band consisting of up to five individual peaks for non-aromatic solutions such as THF or chloroform. Nanosecond transient absorption spectra exhibited a long-lived photoinduced absorption band at 520 nn which can be assigned to triplet absorption. Large quantum yields for intersystem crossing ranging between 30% and 40% were observed. These findings are compared to the results on the monomeric and polymeric compounds and discussed in the framework of exciton coupling.
引用
收藏
页码:23 / 29
页数:7
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