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.
MeSH terms
-
Food Contamination / analysis
-
Hydrogen-Ion Concentration
-
Limit of Detection
-
Luminescent Agents / chemistry*
-
Metal-Organic Frameworks / chemistry*
-
Mycotoxins / analysis*
-
Nanoparticles / chemistry*
-
Neurotoxins / analysis
-
Nitro Compounds / analysis
-
Plant Extracts / analysis
-
Propionates / analysis
-
Saccharum / chemistry
-
Spectrometry, Fluorescence / methods
-
Zirconium / chemistry
Substances
-
Luminescent Agents
-
Metal-Organic Frameworks
-
Mycotoxins
-
Neurotoxins
-
Nitro Compounds
-
Plant Extracts
-
Propionates
-
Zirconium
-
3-nitropropionic acid