A stable nanoscaled Zr-MOF for the detection of toxic mycotoxin through a pH-modulated ratiometric luminescent switch
Xiaolei Guo, Nansong Zhu, Yue Lou, Siyuan Ren, Shirui Pang, Yiqiang He, Xiaobo Chen, Zhan Shi, Shouhua Feng
Abstract
A stable nanoscaled single-excitation ratiometric luminescent pH sensor (MPDB-PCN) over a broad pH range from 2.5 to 8.6 is fabricated through post-synthetic modification of PCN-224 with naphthalimide-derived molecules. Due to the rapid, sensitive and linear response to pH, MPDB-PCN is capable of detecting 3-nitropropionic acid (3-NPA), an acid neurotoxin in food safety, with a low detection limit of 15 μM in sugarcane juice.
Topics & Concepts
LuminescenceDetection limitChemistryLinear rangeMycotoxinMoleculeNanotechnologyCombinatorial chemistryMaterials scienceOptoelectronicsChromatographyOrganic chemistryFood scienceMetal-Organic Frameworks: Synthesis and ApplicationsMolecular Sensors and Ion DetectionLuminescence and Fluorescent Materials