发光
手性(物理)
光致发光
镧系元素
分子
激发态
材料科学
光化学
量子产额
光电子学
化学
原子物理学
光学
有机化学
离子
荧光
物理
夸克
量子力学
手征对称破缺
Nambu–Jona Lasinio模型
作者
Min Zeng,Ang Ren,Wubin Wu,Yongsheng Zhao,Zhan Chen,Jiannian Yao
出处
期刊:Chemical Science
[The Royal Society of Chemistry]
日期:2020-01-01
卷期号:11 (34): 9154-9161
被引量:63
摘要
We present herein an innovative host-guest method to achieve induced molecular chirality from an achiral stilbazolium dye (DSM). The host-guest system is exquisitely designed by encapsulating the dye molecule in the molecule-sized chiral channel of homochiral lanthanide metal-organic frameworks (P-(+)/M-(-)-TbBTC), in which the P- or M-configuration of the dye is unidirectionally generated via a spatial confinement effect of the MOF and solidified by the dangling water molecules in the channel. Induced chirality of DSM is characterized by solid-state circularly polarized luminescence (CPL) and micro-area polarized emission of DSM@TbTBC, both excited with 514 nm light. A luminescence dissymmetry factor of 10-3 is obtained and the photoluminescence quantum yield (PLQY) of the encapsulated DSM in DSM@TbTBC is ∼10%, which is close to the PLQY value of DSM in dilute dichloromethane. Color-tuning from green to red is achieved, owing to efficient energy transfer (up to 56%) from Ln3+ to the dye. Therefore, this study for the first time exhibits an elegant host-guest system that shows induced strong CPL emission and enables efficient energy transfer from the host chiral Ln-MOF to the achiral guest DSM with the emission color tuned from green to red.
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