Structure and photolysis of the dimer of 2,2′-(m-phenylene)bis(4,5-diphenylimidazole-2-yl) diradical

被引：5
|
作者：
Okada, K [1 ]
Imamura, K
Oda, M
Kajiwara, A
Kamachi, M
Ishino, K
Tashiro, K
Kozaki, M
Sato, K
Takui, T
机构：
[1] Osaka City Univ, Grad Sch Sci, Dept Chem, Sumiyoshi Ku, Osaka 5588585, Japan
[2] Osaka Univ, Grad Sch Sci, Osaka 5600043, Japan
来源：
SYNTHETIC METALS | 1999年 / 103卷 / 1-3期
关键词：
heterocycle synthesis; electron spin resonance; nuclear magnetic resonance spectroscopy;
D O I：
10.1016/S0379-6779(98)00649-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation of 2,2'-(m-phenylene)bis(4,5-diphenylimidazole) 1 with potassium ferricyanide in benzene-aqueous KOH heterogeneous solution gave two dimers 2 and 3; 2 piezochromic and photochromic dimer whose structure is deduced by NMR as an anti isomer of 3, 3. photochromic dimer with syn-[3.3]metacyclophane structure elucidated by X-ray structural analysis. Photolysis (>310 nm) of these dimers in frozen CH2Cl2-MTHF (8 : 1) produced the same triplet species which can be assignable as 2, 2'-(m-phenylene)bis(4,5-diphenylimidazole-2-yl) diradical.
引用
收藏
页码：2308 / 2309
页数：2
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