Cyclodextrin Complexation of the Stilbene 4-(2-(4-tert-Butylphenyl)ethen-1-yl)benzoate and the Self-assembly of Molecular Devices

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-cyclodextri