BIRADICAL STATE IN PHTHALOCYANINE (2+2) TETRAMER COMPOSED OF 2 BIS(PHTHALOCYANINATO)LUTETIUM RADICALS

被引：54

作者：

ISHIKAWA, N

KAIZU, Y

机构：

[1] Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152, O-okayama

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 203卷 / 5-6期

关键词：

D O I：

10.1016/0009-2614(93)85294-X

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 behavior of two holes in a phthalocyanine (2 + 2) tetramer which consists of two bis (phthalocyaninato)lutetium radicals is studied by absorption, MCD, ESR spectra. The dimer, one of whose phthalocyanine rings is peripherally substituted by four 15-crown-5 rings, forms a (2 + 2) tetramer in the presence of K+ ions in solution. All major absorption bands except the lowest energy band are blue-shifted with the tetramer formation. The (2 + 2) tetramer preserves the near-IR band that is a characteristic of the dimer radical, and shows a triplet ESR spectrum. The experimental results indicate that the tetramer is a biradical.

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页码：472 / 476

页数：5

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