J. Lock, B. May, P. Clements
Oct 1, 2004
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Influential Citations
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Journal
Journal of inclusion phenomena and macrocyclic chemistry
Abstract
E-4-(2-(4- tert - butylphenyl) ethen-1- yl)benzoate, E-1−, photoisomerizes to the Z-1− isomer and vice versa in the free state and in the binary complexes 2·E-1−, 2·Z-1−, 3·E-1− and 3·Z-1− where 2 is the urea-linked cyclodextrin N-(6A-deoxy-α-cyclodextrin-6A- yl)-N′-(6A-deoxy-β-cyclodextrin-6A- yl)urea and 3 is N,N- bis(6A-deoxy-β-cyclodextrin-6A- yl)urea. In 2·E-1−and 3·E-1− the stilbene occupies both cyclodextrin (CD) components of 2 and 3, whereas in 2·Z-1− and 3·Z-1− it only occupies one CD component while the other CD component is unoccupied. 4- tert - Butylphenolate, 4−, and its carboxylate, 5−, and sulfonate, 6−, analogues form the ternary complex 2·Z-1−·4− and its analogues and also 3·Z-1−·4− and its analogues. These photoisomerize to 2·E-1−and 3·E-1− and either free 4−, 57− or 6− and thereby function as molecular devices.