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Triplet Biradicals that are Stable in Crystals

 

作者: Koichi Tanaka,   Fumio Toda,   Taiichi Higuchi,  

 

期刊: Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals  （Taylor Available online 1992）
卷期: Volume 219, issue 1  

页码: 135-137

 

ISSN:1058-725X

 

年代: 1992

 

DOI:10.1080/10587259208032125

 

出版商: Taylor & Francis Group

 

关键词: Triplet Biradical;Photochromic Phenomena;Inclusion Crystal;N,N′-Dimethyl Indigo

 

数据来源: Taylor

 

摘要:

Threetrans-syn- 3,3′-diary1-2,2′-biindenyl-idene-1,1′-diones (2a-c) showed sharp photochromic phenomena in their crystalline forms. By exposure to sunlight,2a-cwere converted to stable biradicals (3a-c). AlthoughN,N′-dimethyl indigo (6) has an almost planar structure,6in its 1:1 inclusion crystal with the host 1,1,6,6-tetrapheny1-2,4-hexadiyne-1,6-diol (7) was found to have a twisted structure of dihedral angle 42.6° between the two rings.

 

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