Keywords
cation-‘capped’ complex
crown ether
E–Z-photoisomerisation
hydrogen bonding
styryl dye
Abstract
Two new styryl dyes of the benzothiazole series containing a 18-crown-6 moiety and an N-ammoniohexyl or N-ethyl substituent were synthesised. In acetonitrile, the dye bearing the ammoniohexyl linker forms a stable dimeric complex in the E-form and an intramolecular cation-‘capped’ complex in the Z-form due to ‘host–guest’ hydrogen bonding.
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