Ratiometric detection of pH is always significant in environmental regulation, medical diagnosis, synthetic chemistry, and beyond. The construction of practical ratiometric pH sensors with reusability is still challenging. Herein, by exploiting a multivariate strategy, we first synthesized and reported a series of novel three-component covalent organic frameworks (COF-COOHX, X = 33, 50, and 67) through Schiff base reaction between 2-hydroxybenzene-1,3,5-tricarbaldehyde (HTA), 4,4′-diamino-3,3′-biphenyldicarboxylic acid (DBA), and 5,5′-diamino-2,2′-bipyridine (BPY) at various molar ratios (X = [DBA]/([BPY] + [DBA]) × 100 = 33, 50, and 67). COF-COOHX (X = 33, 50, and 67) displayed ratiometric pH sensing performance in acidic conditions with selectivity and repeatability. By tuning the molar ratio of DBA and BPY, the fluorescent properties, linear pH responsive ranges, and pKa values of COF-COOHX (X = 33, 50, and 67) can be regulated. Meanwhile, the two-component COF-COOH0 and COF-COOH100 did...
Ratiometric fluorescent pH sensor based on a tunable multivariate covalent organic framework.
Yu Ma, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institutes of Biomedical Sciences, Shandong Normal University, Jinan 250014, China. E-mail email@example.com
Jie-Yu Yue, Li-Ping Song, Xiu-Li Ding, Yu-Tong Wang, Peng Yang, Yu Ma, Bo Tang; Ratiometric fluorescent pH sensor based on a tunable multivariate covalent organic framework.. IFIS Food and Health Sciences Database 2023; doi:
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