Ni Jun, Li Mei-Yu, Liu Zhen, Zhao He, Zhang Jian-Jun, Liu Shu-Qin, Chen Jun, Duan Chun-Ying, Chen Li-Yong, Song Xue-Dan
School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
ACS Appl Mater Interfaces. 2020 Mar 11;12(10):12043-12053. doi: 10.1021/acsami.9b22130. Epub 2020 Feb 28.
Multiemissive sensors are being actively pursued, because of their ratiometric luminescent detection capabilities, which demonstrates better sensitivity and selectivity than conventional single-emission sensors. Herein, we present a trichromatic white-light-emitting metal-organic framework (MOF) composite () by simultaneously incorporating red/green-emitting Pt/Ru complex cations into porous blue-emitting bio-MOF-1 through post-synthetic modification. With the help of a three-dimensional (3-D) dual-ratiometric luminescence recognition method, and unique turn-on responses of the red emission toward amine compounds (ACs), including NH and aliphatic amines, via confinement-induced luminescence enhancement effect, can work as a dual-ratiometric luminescent sensor for discrimination of 7 out of 11 AC vapors. This work not only provides a new AC sensing mechanism (confinement effect) that can induce a "turn-on" response but also proves that the accuracy and selectivity of composite sensor can be greatly improved through the combination of 3-D recognition method and the confinement effect. Thus, it open up fresh opportunities to develop composite sensors with excellent sensing and differentiating ability.
由于多发射传感器具有比率发光检测能力，其灵敏度和选择性优于传统的单发射传感器，因此人们正在积极研发此类传感器。在此，我们通过后合成修饰将发红光/绿光的铂/钌复合阳离子同时引入多孔蓝光发射生物金属有机框架（bio-MOF-1）中，制备了一种三色发白光的金属有机框架（MOF）复合材料（）。借助三维（3-D）双比率发光识别方法，以及通过限制诱导发光增强效应，复合材料对包括NH和脂肪胺在内的胺类化合物（ACs）的红色发射具有独特的开启响应，该复合材料可作为双比率发光传感器，用于区分11种AC蒸汽中的7种。这项工作不仅提供了一种能诱导“开启”响应的新型AC传感机制（限制效应），还证明了通过三维识别方法与限制效应相结合，可大大提高复合传感器的准确性和选择性。因此，这为开发具有优异传感和区分能力的复合传感器开辟了新的机遇。
