Long-lived and oxygen-responsive photoluminescence in the solid state of copper(I) complexes bearing fluorinated diphosphine and bipyridine ligands
Long-lived and oxygen-responsive photoluminescence in the solid state of copper(I) complexes bearing fluorinated diphosphine and bipyridine ligands
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DOI：
10.1039/c5dt00199d
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发表时间：
2015-01-01
影响因子：
4
通讯作者：
Tsubomura, Taro
中科院分区：
文献类型：
--
作者：
Nishikawa, Michihiro;Wakita, Yuri;Tsubomura, Taro
研究了一系列新合成的含2，2‘-联吡啶衍生物和1，2-bis[bis(pentafluorophenyl)phosphino]ethane(Dfppe)[Cu(Diimine)(Dfppe)]Pf6的铜(I)配合物的发光性质。[Cu(6dmbpy)(Dfppe)]Pf6(6dmbpy=6，6‘-二甲基-2，2’-联吡啶)在固态条件下(phi=9%，tau=16,180亩S)的量子产额和发光寿命远大于空气中(phi=0.5%，tau=1.5，8.0亩S)，是含二亚胺和双膦的铜(I)配合物中寿命最长的配合物之一。晶体堆积、激发态结构重排和跃迁的性质对于dfppe络合物的光物理很重要。晶体中的空穴以及激发态很长的寿命对固态氧响应光致发光起着关键作用。
Luminescence properties of a family of newly synthesized copper(I) complexes bearing 2,2'-bipyridine derivatives and 1,2-bis[bis(pentafluorophenyl)phosphino]ethane (dfppe), [Cu(diimine)(dfppe)]PF6, were investigated. The quantum yield and the lifetime of the emission of [Cu(6dmbpy)(dfppe)]PF6 (6dmbpy = 6,6'-dimethyl-2,2'-bipyridine) in the solid state under argon (Phi = 9%, tau = 16, 180 mu s), which is one of the longest lifetimes among all copper(I) complexes bearing diimine and diphosphine, are much larger than those under air (Phi < 0.5%, tau = 1.5, 8.0 mu s). Crystal packing, structural rearrangement in the excited state, and nature of the transitions are important for the photophysics of dfppe complexes. The voids in the crystals as well as the very long lifetimes of the excited states play a key role for oxygen responsive photoluminescence in the solid state.