化学
分子内力
分子间力
发色团
光化学
共轭体系
分子
电子转移
激发态
组合化学
立体化学
有机化学
聚合物
原子物理学
物理
作者
Jianyu Zhang,Lianrui Hu,Kaihua Zhang,Junkai Liu,Xingguang Li,Haoran Wang,Zhaoyu Wang,Herman H. Y. Sung,Ian D. Williams,Zebing Zeng,Jacky W. Y. Lam,Haoke Zhang,Ben Zhong Tang
摘要
Apart from the traditional through-bond conjugation (TBC), through-space conjugation (TSC) is gradually proved as another important interaction in photophysical processes, especially for the recent observation of clusteroluminescence from nonconjugated molecules. However, unlike TBC in conjugated chromophores, it is still challenging to manipulate TSC and clusteroluminescence. Herein, simple and nonconjugated triphenylmethane (TPM) and its derivatives with electron-donating and electron-withdrawing groups were synthesized, and their photophysical properties were systematically studied. TPM was characterized with visible clusteroluminescence due to the intramolecular TSC. Experimental and theoretical results showed that the introduction of electron-donating groups into TPM could red-shift the wavelength and increase the efficiency of clusteroluminescence simultaneously, due to the increased electronic density and stabilization of TSC. However, TPM derivatives with electron-withdrawing groups showed inefficient or even quenched clusteroluminescence caused by the vigorous excited-state intramolecular motion and intermolecular photoinduced electron transfer process. This work provides a reliable strategy to manipulate TSC and clusteroluminescence.
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