A self-calibrating dual responsive platform for the sensitive detection of sulfite and sulfonic derivatives based on a robust Hf() metal-organic framework

A robust hafnium-based metal organic framework, Hf-PBTA , with sensitive and self-calibrating dual-emissive fluorescence response towards sulfite and sulfonic derivatives, including antibiotic sulfamethazine, has been developed, which shows fast detection of sulfite ions at a concentration as low as...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2020-01, Vol.56 (4), p.631-634
Main Authors: Xing, Kai, Fan, Rui-Qing, Liu, Xiao-Yuan, Gai, Shuang, Chen, Wei, Yang, Yu-Lin, Li, Jing
Format: Article
Language:English
Subjects:
Antibiotics
Calibration
Derivatives
Emission spectra
Fluorescence
Hafnium
Metal-organic frameworks
Protonation
Robustness
Synergistic effect
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Summary:A robust hafnium-based metal organic framework, Hf-PBTA , with sensitive and self-calibrating dual-emissive fluorescence response towards sulfite and sulfonic derivatives, including antibiotic sulfamethazine, has been developed, which shows fast detection of sulfite ions at a concentration as low as 76 ppb. The opposite response tendency from two radiative pathways towards aromatic sulfonic molecules and sulfite anions stems from the synergistic effect of the pyridine protonation effect, π-π stacking interaction and intramolecular twist motion. A robust Hf-MOF exhibits highly-sensitive and opposite ratiometric fluorescence response towards sulfite and sulfonic derivatives.
ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc07869j