RhB-Embedded Mn-MOF with Cyclotriphosphazene Skeleton as Dual-Emission Sensor for Putrescine as well as Smart Fluorescent Response of Aromatic Diamines and Nitrophenol
Zi Yang Wang, Shan Jiang, Mei Lv, Zi Wen Liu, Yu Xian, Feng‐Ying Bai, Yong Heng Xing
Abstract
Luminescent metal–organic framework composites with multiple luminescence emissions have been efficient sensing platforms. Herein, a fluorescent sensor ( [email protected] ) with dual-emission fluorescence properties was prepared by introducing rhodamine B (RhB) into the framework of complex 1, [Mn 2.5 (HCPCP)(H 2 O) 4 ]·(CH 3 CN) 0.5 [HCPCP = hexa-(4-carboxyl-phenoxy)-cyclotriphosphazene and CH 3 CN = acetonitrile), which is a novel crystalline two-dimensional (2D) coordinated organic framework material. It is a highly desirable material, realizing a ratiometric fluorescence response to putrescine with a high signal-to-noise ratio, and the detection limit can be as low as 6.8 μM. In addition, [email protected] exhibited a better fluorescent sensing performance for aromatic diamines and nitrophenols compared with that of complex 1 . It is a potential functionalized MOF material for the application of multichannel fluorescence sensing.