Metallomesogens based on platinum(ii) complexes: synthesis, luminescence and polarized emission
作者:Yafei Wang、Yu Liu、Jian Luo、Hongrui Qi、Xiaoshuang Li、Meijun Nin、Ming Liu、Danyan Shi、Weiguo Zhu、Yong Cao
DOI:10.1039/c0dt01515f
日期:——
Two series of heteroleptic cyclometalated platinum(II) complexes [(CnOppy)Pt(acac) and (CnOFppy)Pt(acac)] have been prepared. Their liquid-crystal and optophysical properties were studied, in which CnOppy is 2-(4-alkoxyphenyl)-5-(alkoxymethyl)pyridine and CnOFppy 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 (Sm) 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.
已制备两系列杂配位环金属化铂(II)络合物[(CnOppy)Pt(acac) 和 (CnOFppy)Pt(acac)]。研究了它们的液晶和光物理性质,其中CnOppy是2-(4-烷氧基苯基)-5-(烷氧基甲基)吡啶,CnOFppy是2-(3-氟-4-烷氧基苯基)-5-(烷氧基甲基)吡啶。仅有杂配位环金属化铂(II)络合物(n = 12和16)表现出具层状(Sm)结构的外消旋相变。在常温下,在对齐的聚酰亚胺薄膜中,经过光激发获得了最大峰值为532 nm且极化比高达10.5的强极化发光。该研究工作提供了一种通过杂配位环金属化铂(II)络合物实现高效率极化发射的简单方法。