A Two‐Dimensional Metal–Organic Framework as a Fluorescent Probe for Ascorbic Acid Sensing

Abstract

Ascorbic acid (AA) is an important biological molecule, but the detection of AA is still a huge challenge. Therefore, highly sensitive and selective fluorescent sensors for AA determination are urgently demanded. In this work, the new organic linker 4,4′‐(1 H ‐pyrazole‐1,3‐diyl)dibenzoic acid (H 2 L) was prepared to construct the new two‐dimensional metal–organic framework (MOF) ZnL(H 2 O) (ZJU‐137, ZJU = Zhejiang University). The ZJU‐137 MOF demonstrates high selectivity and sensitivity for the detection of AA through fluorescence quenching. The detection limit for AA was 34 nM, and a wide linear concentration‐dependent response (0–60 µ m ) was observed; hence, ZJU‐137 has promising potential for the determination of AA in practical applications.