期刊
DALTON TRANSACTIONS
卷 40, 期 18, 页码 5046-5051出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0dt01515f
关键词
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资金
- National Natural Science Foundation of China [50973093, 20772101, 20872124]
- Science Foundation of Hunan Province [2009FJ2002]
- Specialized Research Fund for the Doctoral Program of Higher Education [2009 4301110004]
- New Teachers Fund for the Doctoral Program of Higher Education of China [200805301013]
- Postgraduate Science Foundation for Innovation in Hunan Province [CX2009B124, S2008 yjscx09]
Two series of heteroleptic cyclometalated platinum(II) complexes [(C(n)Oppy)Pt(acac) and (C(n)OFppy)Pt(acac)] have been prepared. Their liquid-crystal and optophysical properties were studied, in which C(n)Oppy is 2-(4-alkoxyphenyl)-5-(alkoxymethyl) pyridine and C(n)OFppy is 2-(3-fluoro-4-alkoxyphenyl)-5-(alkoxymethyl)pyridine. Only the heteroleptic cyclometalated platinum(II) complexes (n = 12 and 16) exhibited enantiotropic mesophase transitions with smectic (S-m) structure. Intense polarized luminescence with a maximum peak at 532 nm and a polarization ratio as high as 10.5 were obtained in an aligned polyimide film under opto-excitation at room temperature. This research work provides a simple approach to realize high-efficiency polarized emission by heteroleptic cyclometalated platinum(II) complexes.
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