Synthesis, photophysics and electrochemistry of copper(I) diimine complexes containing thia-, selena- and tellura-crowns. A spectrochemical and luminescence ion probe for soft metal ions

Abstract

A series of copper(I) diimine complexes containing benzo-10-thia-15-crown-5, benzo-10-selena-15-crown-5, benzo-10-tellura-15-crown-5 and benzo-7,10,13-trithia-15-crown-5 moieties have been synthesized and characterized and their photophysics and electrochemistry studied. The encapsulation of soft metal ions by the cavity of the complexes has been investigated by electronic absorption and emission spectroscopy. The crystal structures of [Cu(PPh₃)₂(dic-S)]BF₄ and [Cu(PPh₃)₂(dic-Se)]BF₄ have been determined.