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Novel Macrocycles Bearing Dithienylethene Units and Urea Functional Groups: Synthesis, Structure and Photochromic Property
Author(s) -
Xiao Tangxin,
Li Shaolu,
Zhang Xiaoning,
Lin Chen,
Wang Leyong
Publication year - 2013
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.201300246
Subject(s) - photochromism , chemistry , urea , ring (chemistry) , crystal structure , bearing (navigation) , polymer chemistry , photochemistry , combinatorial chemistry , crystallography , organic chemistry , cartography , geography
Two novel photochromic macrocycles 1 and 2 bearing dithienylethene units and urea building blocks have been synthesized, and their photochromic properties are described. Macrocycle 2 shows good photochromic properties, while the relatively smaller size of macrocycle 8b exhibits photochemically inactive properties due to the unfavourable ring conformational constraint. Moreover, the crystal structures of the urea‐protected precursor macrocyles 3a , 3b , and 8b are presented.