Luminescent Platinum(II) Complexes with Bidentate Diacetylide Ligands: Structures,Photophysical Properties and Application Studies |
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| Authors: | Zaoli Luo Dr. Yungen Liu Dr. Ka-Chung Tong Dr. Xiao-Yong Chang Dr. Wai-Pong To Prof. Dr. Chi-Ming Che |
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| Affiliation: | 1. Department Key Laboratory of Pesticide & Chemical Biology Ministry of Education and Chemical Biology Center College of Chemistry, Central China Normal University, Wuhan, 430079 P. R. China;2. Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 P. R. China;3. State Key Laboratory of Synthetic Chemistry HKU-CAS Joint Laboratory on New Materials Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, P. R. China |
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| Abstract: | A series of platinum(II) complexes supported by terphenyl diacetylide as well as diimine or bis-N-heterocyclic carbene (NHC) ligands have been prepared. The diacetylide ligands adopt a cis coordination mode featuring non-planar terphenyl moieties as revealed by X-ray crystallographic analyses. The electrochemical, photophysical and photochemical properties of these platinum(II) complexes have been investigated. These platinum(II) diimine complexes show broad emission with peak maxima from 566 nm to 706 nm, with two of them having emission quantum yields >60% and lifetimes <2 μs in solutions at room temperature, whereas the platinum(II) diacetylide complexes having bis-N-heterocyclic carbene instead of diimine ligand display photoluminescence with quantum yields of up to 28% in solutions and excited state lifetimes of up to 62 μs at room temperature. Application studies revealed that one of the complexes can catalyze photoinduced aerobic dehydrogenation of alcohols and alkenes, and a relatively non-toxic water-soluble Pt(II) complex displays anti-angiogenic activity. |
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| Keywords: | luminescence platinum diimine diacetylide bis-N-Heterocyclic carbene |
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