Two-semiconductive-component hybrid coordination polymers with controllable photo-induced electron-transfer properties

Abstract

Two semiconductive inorganic–organic hybrid coordination polymers constructed from metal iodide clusters and naphthalene diimide semiconductive components, [Cu₂I₂(DPNDI)]_n (1) and [PbI₂(DPNDI)]_n (2) (DPNDI = N,N′-di-(4-pyridyl)-1,4,5,8-naphthalene diimide), have been synthesized and characterized. Although possessing similar 2D heterostructures, hybrids 1–2 exhibited different photo-induced electron-transfer properties. Due to the higher HOMO energy level of the [Cu₂I₂]_n chain than that of the [PbI₂]_n cluster, only hybrid 1 can easily undergo intramolecular electron transfer to form a long-lived charge separated state, which may be applied in artificial photosynthesis.