Highly Luminescent Liquid Crystals in Aggregation Based on Platinum(II) Complexes
Highly Luminescent Liquid Crystals in Aggregation Based on Platinum(II) Complexes
复制标题
基于铂(II)络合物的聚集高发光液晶
DOI：
10.1021/acsami.0c13935
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发表时间：
2020-11-25
影响因子：
9.5
通讯作者：
Xie, Xiaolin
中科院分区：
文献类型：
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作者：
Hao, Xingtian;Xiong, Bijin;Xie, Xiaolin
发光液晶因其在显示器、化学传感器、防伪等领域的广泛应用而备受关注。然而，由于LCS中常见的聚集猝灭效应，要获得高的发光效率仍然具有挑战性。在这里，我们展示了一种简单的方法来设计高达88%的量子产率的LLC，通过有意地调节具有烷氧基链(CnH_2n+O-)的铂(II)配合物的聚集行为。一维广角X射线衍射谱和小角X射线散射谱表明，当n=12和n=16时，分别获得了六方柱状相和矩形柱状相的LLC。这些LLC不仅能够在高温下表现出强烈的发射，而且比替代的CH2Cl2和Etoh Fuming具有诱人的可逆汽致变色性能，赋予了额外的功能并有望实现技术实用。
Luminescent liquid crystals (LLCs) attract considerable attention because of their broad applications in displays, chemosensors, and anti-counterfeiting. However, it remains challenging to achieve a high luminescence efficiency in LCs because of the common aggregation-caused quenching effect. Herein, we demonstrate a facile approach to designing LLCs with a high quantum yield up to 88% by deliberately tuning the aggregation behavior of platinum(II) complexes with alkoxy chains (CnH2n+1O-). LLCs in hexagonal columnar and rectangular columnar phases are achieved when n = 12 and 16, respectively, as revealed by one-dimensional wide-angle X-ray diffraction and small-angle X-ray scattering. These LLCs are able to not only exhibit strong emission at elevated temperatures but also show attractive reversible vapochromism upon alternative CH2Cl2 and EtOH fuming, which imparts added functions and promises technological utility.