The synthesis and complexation studies of thia-anthracene receptors

Article abstract of DOI:10.1016/S0040-4020(99)00654-7

Systematic studies towards the formation of thia-anthracene receptors were performed. Anthracene podand 3 consisting of two anthryl groups connected by the SCH₂CH₂CH₂S spacer group was prepared in 99% yield. The complexation properties of this compound were investigated using UV-VIS and fluorescence titration techniques. Addition of silver salts into a solution of the fluorophore strongly modifies the absorption and fluorescence spectra and the association constants were found to be K₁ = 2 x 10⁵ and K₂ = 8 x 10⁴ M^-1 for the 1:1 and 1:2 complexes, respectively. Addition of metal ions, as Cu²⁺ Zn²⁺, Cd²⁺, Hg²⁺, Ni²⁺, and Co²⁺, did not lead to any change in the photophysical properties of compound 3.