Wang Yuan, Zhu Xuefeng, Han Jianlei, Liang Tongling, Wu Ningning, Xiang Junfeng, Ouyang Guanghui, Liu Minghua
Beijing National Laboratory of Molecular Sciences and CAS Key Laboratory of Colloid, Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, ZhongGuanCun North First Street 2, Beijing, 100190, China.
Beijing National Laboratory for Molecular Science (BNLMS), Center for Physicochemical Analysis and Measurement, Institute of Chemistry, CAS, ZhongGuanCun North First Street 2, Beijing, 100190, China.
Adv Sci (Weinh). 2024 Oct;11(40):e2406890. doi: 10.1002/advs.202406890. Epub 2024 Sep 3.
Interactions between lone pairs and aromatic π systems are significant across biology and self-assembled materials. Herein, employing an achiral confinement metal-organic framework (MOF) encapsulates guest molecules, it is successfully realized that lone pair (lp)-π interaction induces fluorescence "turn-on" and circularly polarized luminescence for the first time. The MOFs synthesized based on naphthalenediimide show nearly non-emissive, which can be light-up by introducing acetone or ester guests containing lone pairs-π interaction. Furthermore, the introduction of a series of lp-rich chiral esters induces supramolecular chirality as well as circularly polarized luminescence in achiral MOFs, while also observing chiral adaptability. This work first demonstrates the luminescence and chiral induction via lone pair electrons-π interactions, presenting a fresh paradigm for the advancement of chiroptical materials.
孤对电子与芳香π体系之间的相互作用在生物学和自组装材料中都具有重要意义。在此，通过使用一种非手性限域金属有机框架（MOF）来封装客体分子，首次成功实现了孤对电子（lp）-π相互作用诱导荧光“开启”和圆偏振发光。基于萘二酰亚胺合成的MOF几乎不发光，通过引入含有孤对电子-π相互作用的丙酮或酯类客体可以使其发光。此外，引入一系列富含孤对电子的手性酯会在非手性MOF中诱导超分子手性以及圆偏振发光，同时还观察到了手性适应性。这项工作首次证明了通过孤对电子-π相互作用实现发光和手性诱导，为手性光学材料的发展提供了一种全新的范例。
