A Novel Benzimidazole-Based Chemosensor for Fluorometric Determination of Zinc Ions

Ersin Orhan; Ece Ergun; Koray Şarkaya; Ümit Ergun

doi:10.1007/s10895-021-02818-w

A Novel Benzimidazole-Based Chemosensor for Fluorometric Determination of Zinc Ions

J Fluoresc. 2021 Nov;31(6):1833-1842. doi: 10.1007/s10895-021-02818-w. Epub 2021 Sep 14.

Authors

Ersin Orhan¹, Ece Ergun², Koray Şarkaya³, Ümit Ergun¹

Affiliations

¹ Department of Chemistry, Faculty of Arts and Sciences, Düzce University, 81620, Düzce, Turkey.
² Turkish Energy, Nuclear and Mineral Research Agency, Nuclear Energy Research Institute, 06980, Ankara, Turkey. ergunlady@gmail.com.
³ Department of Chemistry, Faculty of Science and Arts, Pamukkale University, 20160, Denizli, Turkey.

PMID: 34519936
DOI: 10.1007/s10895-021-02818-w

Abstract

A simple and novel Schiff base chemosensor (BMHM) based on benzimidazole was synthesized. In ethanol-water (1:1, v/v) medium on varying concentrations of Zn²⁺ chemosensor exhibited a strong and quick turn on fluorescence response. The Zn²⁺ recognition was based on the Chelation-enhanced fluorescence effect. The binding constant and limit of detection for BMHM-Zn²⁺ complexation were estimated to be 7.99 × 104 M^-1 and 0.148 µM, respectively. The extreme fluorescent enhancement caused by Zn²⁺ binding in chemosensor BMHM occurred at a pH range of 6-7. The practical use of chemosensor BMHM was tested by determination of Zn²⁺ in real water samples and comparing the results with the data obtained using high resolution inductively coupled plasma mass spectrometry.

Keywords: Benzimidazole; Chemosensor; Schiff base; Zinc ion.

Abstract

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