Dinuclear cyclometalated platinum (II) complexes: Synthesis, photophysics, and monomolecular electroluminescence

作者：Wang, Yafei; Luo, Jian; Liu, Yu^*; Zhang, Zhiyong; Tan, Hua; Yu, Junting; Lei, Gangtie; Zhu, Meixiang; Zhu, Weiguo

来源：Organic Electronics, 2012, 13(9): 1646-1653.

DOI：10.1016/j.orgel.2012.05.011

• Electroluminescence
• Dinuclear platinum (II) complex
• Polymer light emitting devices
• Excimer

Two novel dinuclear platinum (II) complexes of (C(12)Rppy)(2)Pt-2(dipic) (R = H and F) were synthesized and characterized, where C(12)Rppy is a 2-phenylpyridine derivative modified with dodecyloxy groups and dipic is a bi-picolinic acid derivative linked by biphenyl unit. Their physical, surface morphologies and optoelectronic properties, as well as molecular orbitals calculation were investigated. Intense excimer emission for both dinuclear platinum (II) complexes were observed in their neat films rather than in their dichloromethane solution under photo-excitation. In contrary, these dinuclear platinum (II) complexes exhibited a stronger monomolecular emission instead of excimer emission in their doped single-emissive-layer polymer light-emitting devices (PLEDs) under electric field owing to the effect of two alkyloxy groups in the ligand of 2-phenylpyridine. Better electroluminescent emission with a maximum current efficiency of 1.3 cd/A and a maximum luminance of 1407 cd/cm(2) was observed in the (C(12)Hppy)(2)Pt-2(dipic)-doped devices. To our best knowledge, the performance of (C(12)Rppy)(2)Pt-2(dipic) (R = H and F) is among the top values for the solution-processed dinuclear platinum (II) complex-based PLEDs reported so far.

• 出版日期2012-9
• 单位湘潭大学