Elastic and bright assembly-induced luminescent crystals of platinum(II) complexes with near-unity emission quantum yield
Elastic and bright assembly-induced luminescent crystals of platinum(II) complexes with near-unity emission quantum yield
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具有接近统一发射量子产率的弹性、明亮的组装诱导的铂(II)配合物发光晶体
DOI：
10.1039/d3dt00192j
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发表时间：
2023
影响因子：
4
通讯作者：
Kato Masako
中科院分区：
文献类型：
--
作者：
Makino Yusuke;Yoshida Masaki;Hayashi Shotaro;Sasaki Toshiyuki;Takamizawa Satoshi;Kobayashi Atsushi;Kato Masako
具有亲金属相互作用的Pt（II）配合物的分子晶体可以提供明亮的组装诱导发光，具有颜色可调性。然而，许多这些晶体的脆性使得它们在柔性光学材料中的应用变得困难。在这里，我们已经实现了弹性变形的多卤代Pt（II）配合物的晶体表现出明亮的组装诱导发光。发现[Pt（bpic）（dFppy）]（Hbpic = 5-溴吡啶甲酸，HdFppy = 2-（2，4-二氟苯基）吡啶）晶体和[Pt（bpic）（dFppy）]和[Pt（bpic）（ppy）]（Hppy = 2-苯基吡啶）的共晶体由于其高度各向异性的相互作用拓扑结构而表现出显著的弹性变形。虽然[Pt（bpic）（dFppy）]的晶体表现出具有0.40的发射量子产率的基于单体的配体中心的3ππ* 发射，但是共晶体由于Pt与Pt相互作用而表现出明亮的三重态金属-金属-配体电荷转移（3 MMLCT）发射，从而实现0.94的显著更高的发射量子产率。
Molecular crystals of Pt(II) complexes with metallophilic interactions can provide bright assembly-induced luminescence with colour tunability. However, the brittleness of many of these crystals makes their application in flexible optical materials difficult. Herein, we have achieved the elastic deformation of crystals of polyhalogenated Pt(II) complexes exhibiting bright assembly-induced luminescence. A crystal of [Pt(bpic)(dFppy)] (Hbpic = 5-bromopicolinic acid, HdFppy = 2-(2,4-difluorophenyl)pyridine) and a co-crystal of [Pt(bpic)(dFppy)] and [Pt(bpic)(ppy)] (Hppy = 2-phenylpyridine) were found to exhibit significant elastic deformation due to their highly anisotropic interaction topologies. While the crystal of [Pt(bpic)(dFppy)] exhibited monomer-based ligand-centred 3ππ* emission with an emission quantum yield of 0.40, the co-crystal exhibited bright, triplet metal–metal-to-ligand charge transfer (3MMLCT) emission owing to Pt⋯Pt interactions, thereby achieving a significantly higher emission quantum yield of 0.94.