Journal
TETRAHEDRON
Volume 61, Issue 52, Pages 12256-12263Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2005.09.099
Keywords
photoswitch; macrocycle; diarylethene; high quantum yield
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Two macrocycles bearing four dithienylethene units were synthesized. Upon irradiation of the macrocycles 5 and 6 with ultraviolet light, only one or two photo-induced cyclization reaction occurs. Each isomers were isolated and analyzed by H-1 NMR spectrum. The quantum yield of 5 and 6 are 0.58 and 0.64, respectively. The high value is due to the presence of enforced antiparallel conformation in the macrocycles 5 and 6. (c) 2005 Elsevier Ltd. All rights reserved.
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