Journal of Fluorescence

, Volume 29, Issue 4, pp 945–952 | Cite as

Triazole-Coupled Benzimidazole-Based Fluorescent Sensor for Silver, Bromide, and Chloride Ions in Aqueous Media

  • Yoon Gun Ko
  • Won Sik Na
  • Mayank
  • Narinder SinghEmail author
  • Doo Ok JangEmail author


A triazole-coupled benzimidazole-based fluorescent probe S1 with nitrogen and oxygen binding sites was synthesized and its properties as a probe for cations were investigated. Probe S1 was found to be highly selective toward Ag+ ions in aqueous media. The fluorescence intensity of S1 was quenched as a function of the concentration of Ag+ ions in the presence of potential interfering cations with a detection limit of 2.70 μM. The resulting S1-Ag+ complex was subsequently studied for its anion recognition abilities and found to recognize Br and Cl ions, revealing the concentration-dependent fluorescence enhancement with detection limits of 22.2 and 23.0 μM, respectively. Revival of the fluorescence profile of probe S1 indicated that Ag+ ion was released from the S1-Ag+ complex. Probe S1 is a sensor that can be single-handedly utilized for the qualitative and quantitative determination of Ag+, Br, and Cl ions in aqueous media.


Triazole Benzimidazole Fluorescence Sensor 



This research was supported partially by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2018R1D1A1B07041198).

Compliance with Ethical Standards

Conflict of Interest

The authors declare no conflict of interest.

Supplementary material

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ESM 1 (DOCX 2112 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of ChemistryYonsei UniversityWonjuRepublic of Korea
  2. 2.Department of Chemistry, Indian Institute of Technology RoparRupnagarIndia

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