Photoinduced Multistep Charge Separation in a Heteroleptic Cu(Ⅰ) Bis(phenanthroline)-Based Donor-Chromophore-Acceptor Triad

摘要

A molecular triad assembly consisting of an electron donor, a bis(phenanthroline)copper(Ⅰ) chromo-phore, and an electron acceptor has been prepared. Under visible-light excitation, this assembly undergoes efficient (ca. 50%) photoinduced, multistep formation of a diradical cation charge-separated state that has a lifetime of >100 ns and stores >1.0 eV of energy. This system constitutes an earth-abundant functional analogue of related Ru(bpy)_3 triad systems.