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A self-calibrating dual responsive platform for the sensitive detection of sulfite and sulfonic derivatives based on
Kai Xing1, Rui-Qing Fan2, Xiao-Yuan Liu3
1MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn and Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Road, Piscataway, New Jersey 08854, USA. jingli@rutgers.edu.
Abstract:
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.
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