期刊
DALTON TRANSACTIONS
卷 42, 期 4, 页码 1231-1237出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2dt31863f
关键词
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资金
- National Natural Science Foundation of China [50973093, 51273168, 21202139]
- Innovation Group in Human Natural Science Foundation [12JJ7002]
- Specialized Research Fund and for the Doctoral Program of Higher Education of China [20094301110004]
- Scientific Research Fund of Hunan Provincial Education Department [10A119, 11CY023, 10B112]
- Natural Science Foundation of Hunan [12JJ4019]
- Scientific Research Fund of Xiangtan University [11QDZ18, 2011XZX08]
A novel dinuclear platinum complex of (dfppy-mhb-dfppy)Pt-2(acac)(2) was synthesized and characterized, where dfppy-mhb-dfppy is a binary (CN)-N-boolean AND cyclometalated ligand containing two bridged 2,4-difluorophenylpyridine (dfppy) units and acac is 2,4-pentanedione anion. Compared to previously reported dinuclear platinum complexes with a binary ancillary ligand, this dinuclear platinum complex showed more intense excimer emission, peaking at 617 nm, besides its intrinsic emission in dilute dichloromethane solution. Single-emissive-layer (SEL) polymer light-emitting devices (PLEDs) using (dfppy-mhb-dfppy)Pt-2(acac)(2) as dopant and a blend of poly (N-vinylcarbazole) (PVK) and 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) as host matrix exhibited stable white emission at 1 wt% doping concentration under applied voltages from 7 V to 11 V. The stable white emission observed in the (dfppy-mhb-dfppy)Pt-2(acac)(2)-doped SEL PLEDs indeed implies that the dinuclear platinum complex constructed by a binary cyclometalated ligand has a potential application in white-emitting SEL PLEDs.
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