Excited-state conformation capture by supramolecular chains towards triplet-involved organic emitters
Excited-state conformation capture by supramolecular chains towards triplet-involved organic emitters
复制标题
超分子链对三重态有机发射体的激发态构象捕获
DOI：
10.1016/j.cclet.2020.12.013
复制
发表时间：
2020-12
影响因子：
9.1
通讯作者：
Zhang Hongyu
中科院分区：
文献类型：
--
作者：
Liu Hao;Ando Naoki;Yamaguchi Shigehiro;Naumov Pance;Zhang Hongyu
目前，三重态材料的开发已成为固态发光领域的研究热点。然而，三线态涉及的发射机制仍然存在一些有待攻克的谜团。在这里，我们提出了一种新的激发态构象捕获概念，用于构建不同类型的三重态材料。首先，激发态构象可以被晶体中的超分子链捕获，并形成不同于溶液或简单刚性环境中的新的最佳激发态结构，从而导致明亮的热激活延迟荧光（TADF）发射。基于激发态构象捕获方法，接下来，我们通过引入Br原子来增强系间窜越而获得了室温磷光（RTP）。从实验结果可以看出，TADF可能源自聚集效应，而RTP可能源自单体。最后通过消除聚集效应实现了无重原子RTP和超RTP。这项工作不仅可以扩展三重态材料的设计方法，还可以为三重态排放机制提供明确的证据。
Nowadays, the development of triplet-involved materials becomes a hot research topic in solid-state luminescence fields. However, the mechanism of triplet-involved emission still remains some mysteries to conquer. Here, we proposed a new concept of excited-state conformation capture for the constructions of different types of triplet-involved materials. Firstly, excited-state conformation could be trapped by supramolecular chains in crystal and form a new optimum excited-state structure which is different from that in solution or simple rigid environment, leading to bright thermally activated delayed fluorescence (TADF) emission. Based on excited-state conformation capture methodology, next, we obtained room-temperature phosphorescence (RTP) by introducing Br atoms for the enhancement of intersystem crossing. It could be concluded from experimental results that TADF may originate from aggregate effect while RTP may derive from monomers. Finally, heavy-atom free RTP and ultra RTP were achieved by eliminating aggregate effect. This work could not only extend the design methodology of triplet-involved materials but also set clear evidences for the mechanism of triplet-involved emissions.
登录
查看更多内容
影响因子：
6.4
作者：
Liu Yuchao;Yin Zheng;Wang Xiangbing;Baranoff Etienne;Zhou Di;Zhang Kai;Ren Zhongjie;Wang Shengyue;Zhu Weiguo;Wang Yafei
通讯作者：
Wang Yafei
带有不对称恶二唑-二氟硼双受体的溶液加工高效蓝绿热激活延迟荧光发射体
影响因子：
9.5
作者：
Zhou Di;Liu Denghui;Gong Xu;Ma Huili;Qian Gaowei;Gong Shaolong;Xie Guohua;Zhu Weiguo;Wang Yafei
通讯作者：
Wang Yafei
通过操纵重原子相互作用增强有机磷光
影响因子：
3.8
作者：
Shi, Huifang;An, Zhongfu;Zhao, Yanli
通讯作者：
Zhao, Yanli
影响因子：
5.7
作者：
Bhatia, Harsh;Bhattacharjee, Indranil;Ray, Debdas
通讯作者：
Ray, Debdas
发光 Cu(I) 和 Ag(I) 配位聚合物：快速磷光或热激活延迟荧光
影响因子：
9.1
作者：
Li Gangyuan;Ye Hao;Zhu Fucheng;Geng Yan;Fan Jianzhong;Ma Jianping;Adachi Chihaya;Dong Yu-Bin
通讯作者：
Dong Yu-Bin