A rare extra-long flexible salamo-based bisoxime as highly efficient and selective probe for fluorescent identification of CO32- ion and mechanism exploration

Pei-Lin Yuan; Na Tuo; Tao Zheng; Li Tong; Yi-Fan Ding; Chu-Feng Sun; Wen-Kui Dong

doi:10.1016/j.saa.2024.125102

A rare extra-long flexible salamo-based bisoxime as highly efficient and selective probe for fluorescent identification of CO₃^2- ion and mechanism exploration

Spectrochim Acta A Mol Biomol Spectrosc. 2025 Jan 15:325:125102. doi: 10.1016/j.saa.2024.125102. Epub 2024 Sep 7.

Authors

Pei-Lin Yuan¹, Na Tuo², Tao Zheng², Li Tong², Yi-Fan Ding², Chu-Feng Sun³, Wen-Kui Dong⁴

Affiliations

¹ Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, Gansu Province Research Center for Basic Sciences of Surface and Interface Chemistry, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730124, PR China. Electronic address: 183081660@xbmu.edu.cn.
² School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, PR China.
³ Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, Gansu Province Research Center for Basic Sciences of Surface and Interface Chemistry, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730124, PR China.
⁴ School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, PR China. Electronic address: dongwk@126.com.

PMID: 39265470
DOI: 10.1016/j.saa.2024.125102

Abstract

A novel extra-long carbon-chain salamo-like fluorescent chemical probe DNS (named as 2,2'-[1,10-(decanedioxy)bis(nitromethyldyne)]dinaphthol) containing ten methylene groups was synthesized based on the 2-hydroxy-1-naphthylaldehyde unit. Research has shown that the fluorescent probe DNS can achieve efficient and selective recognition of CO₃^2- anions, with a detection limit LOD=1.59 × 10^-8 M. The binding constant Ka = 3.7 × 10⁴ M^-1 and quantification limit is as low as LOQ=4.31 × 10^-8 M, respectively. The possible identification mechanism of the fluorescent chemosensor DNS was analyzed and studied through fluorescence titration and nuclear magnetic titration. The results showed that the fluorescence chemical sensor DNS is deprotonated by CO₃^2- anions, enhancing its fluorescence and producing a ICT effect.

Keywords: CO(3)(2−) anion recognition; Fluorescent probe; ICT effect; Salamo-like bisoxime; Synergism.