College of Chemistry, Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan, 411105, China.
Dalton Trans. 2011 May 14;40(18):5046-51. doi: 10.1039/c0dt01515f. Epub 2011 Mar 30.
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.
已制备了两个系列的杂环金属化铂（II）配合物[（C（n）Oppy）Pt（acac）和（C（n）OFppy）Pt（acac）]。研究了它们的液晶和光物理性质，其中 C（n）Oppy 是 2-（4-烷氧基苯基）-5-（烷氧基甲基）吡啶，C（n）OFppy 是 2-（3-氟-4-烷氧基苯基）-5-（烷氧基甲基）吡啶。只有杂环金属化铂（II）配合物（n = 12 和 16）表现出具有向列相（S（m））结构的各向异性介晶转变。在室温下通过光激发在取向的聚酰亚胺膜中获得了最大峰值为 532nm 的强偏振发光，并且偏振比高达 10.5。这项研究工作提供了一种通过杂环金属化铂（II）配合物实现高效偏振发射的简单方法。
