Indexed by:期刊论文

Date of Publication:2016-12-01

Journal:EUROPEAN JOURNAL OF INORGANIC CHEMISTRY

Included Journals:SCIE、Scopus

Volume:2016

Issue:34

Page Number:5283-5299

ISSN No.:1434-1948

Key Words:Platinum; Photochemistry; Photophysics; Light harvesting; FRET; Triplet states

Abstract:Pt-II complexes have attracted much attention due to their readily derivatizable molecular structures and efficient production of triplet excited states and have been extensively used in many areas. Conventional Pt-II complexes usually exhibit small molar absorption coefficients in the visible spectral region, and the triplet excited state lifetimes are short. However, for applications such as photocatalysis, triplet-triplet annihilation (TTA) upconversion, nonlinear optics, etc., visible-light-harvesting Pt-II bis(acetylide) complexes with long-lived triplet excited state are cucial. We summarize strategies directed towards achieving these goals, through the attachment of appropriate strong visible-light-harvesting organic chromophores to the ligand to switch the (S0MLCT)-M-1 (metal-to-ligand charge transfer) transition to the (S0IL)-I-1 (intraligand) transition (-*) and to switch the lowest triplet excited state from the (MLCT)-M-3 to the (IL)-I-3 state. We also summarize the properties of Pt-II bis(acetylide) complexes that show broadband absorption and reverse saturate absorption for application in nonlinear optics. Singlet and triplet energy transfer and localization of the triplet excited state in multiple-chromophore complexes are also discussed.