Alkyl substituent effects on J-or H-aggregate formation of bisazomethine dyes
K Kinashi, KP Lee, S Matsumoto, K Ishida, Y Ueda
Index: Kinashi, Kenji; Lee, Kyun-Phyo; Matsumoto, Shinya; Ishida, Kenji; Ueda, Yasukiyo Dyes and Pigments, 2012 , vol. 92, # 1 p. 783 - 788
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Citation Number: 18
Abstract
Bisazomethine dyes with terminal alkyl substituents of different chain lengths (BAR: R= 1, 2, 3, 4, 5 and 6) were synthesized and deposited on a glass substrate to investigate the effect of the alkyl chain length on aggregate formation. Methyl-and ethyl-substituted bisazomethine dyes (BA1 and BA2) formed J-aggregates in thin films (ca. 50 nm), whereas, propyl-, butyl-, pentyl-and hexyl-substituted derivatives (BA3, BA4, BA5 and BA6) formed H-aggregates ...
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