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Synthesis, Crystal Structure, Solid Photochromic Properties and Light‐induced Radical Behavior of Bis{3‐[alkyl/( p ‐alkoxyphenyl)]‐3‐hydroxyindan‐1‐on‐2‐ylidene} Derivatives
Author(s) -
HAN Jie,
WANG ChangQing,
WEI YongHeng,
PANG MeiLi,
MENG JiBen
Publication year - 2008
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200890143
Subject(s) - photochromism , chemistry , alkyl , electron paramagnetic resonance , photochemistry , crystal structure , radical , spectroscopy , context (archaeology) , elemental analysis , irradiation , crystallography , organic chemistry , nuclear magnetic resonance , paleontology , physics , quantum mechanics , nuclear physics , biology
Abstract A series of new bis{3‐[alkyl/( p ‐alkoxyphenyl)]‐3‐hydroxyindan‐1‐on‐2‐ylidene} derivatives 1 – 6 were prepared and characterized fully by 1 H NMR, IR, MS and elemental analysis data. The structures of compounds 1 , 5 and 6 were confirmed by the single‐crystal X‐ray diffraction. The photochromic and light‐induced properties were examined by means of UV‐Vis and electron spin resonance (ESR) spectroscopy methods, respectively. The results show that all the title compounds in this work simultaneously exhibit photochromism in solid state and generate stable free radicals under irradiation with a 200 W high pressure Hg‐lamp. Structure‐property relationship within these photochromic compounds was discussed in the context of their molecular structures and intra‐molecular interactions.