Synthesis, Mesomorphism, and Luminescent Properties of Calamitic 2-Phenylpyridines and Their Complexes with Platinum(II)
Synthesis, Mesomorphism, and Luminescent Properties of Calamitic 2-Phenylpyridines and Their Complexes with Platinum(II)
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DOI：
10.1021/cm9012156
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发表时间：
2009-08
影响因子：
8.6
通讯作者：
Amedeo Santoro;A. Whitwood;J. Williams;V. N. Kozhevnikov;D. Bruce
中科院分区：
文献类型：
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作者：
Amedeo Santoro;A. Whitwood;J. Williams;V. N. Kozhevnikov;D. Bruce
报道了两个相关的含β-二酮共配体的棒状邻位镀铂配合物的液晶和发光性质。母体配体表现出丰富的近晶多态，但当用稠合的环戊烯环修饰时，向列相占主导地位。配体与四氯铂酸盐(II)反应生成难于溶解的二聚体络合物，可用二甲基亚砜裂解；生成的单体络合物很容易转化为β-二酮络合物。所有的配合物都是介晶性的，β-双酮配合物的激发态寿命为27μS，发射量子效率超过0.5%，是迄今报道的此类材料中最高的。
The liquid crystal and luminescent properties of two related series of rod-like, ortho-platinated complexes bearing a β-diketonate co-ligand are reported. The parent ligands exhibit a rich, smectic polymorphism, but when modified with a fused cyclopentene ring, nematic phases dominate. Reaction of the ligands with tetrachloroplatinate(II) leads to poorly soluble, dimeric complexes that can be cleaved using dimethylsulfoxide; the resulting monomeric complexes are then readily converted to the β-diketonate complexes. All of the complexes are mesomorphic, and the β-diketonate complexes have excited state lifetimes of 27 μs with emission quantum efficiencies exceeding 0.5, the highest yet reported for materials of this type.