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


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.

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Data Availability

All data generated or analysed during this study are included in this published article [and its supplementary information files].


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The authors would like to acknowledge Düzce University.


This study was supported by Düzce University Scientific Research Projects Unit (Project numbers: 2017.05.03.620 and 2019.05.03.947).

Author information




EO: Conceptualization, Investigation, Formal analysis, Resources, Writing—Review and Editing. EE: Conceptualization, Methodology, Validation, Investigation, Writing—Original Draft, Writing—Review and Editing. KŞ: Conceptualization, Investigation, Formal analysis, Resources, Writing—Review and Editing. ÜE: Conceptualization, Methodology, Investigation, Resources, Writing—Review and Editing.

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Correspondence to Ece Ergun.

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Orhan, E., Ergun, E., Şarkaya, K. et al. A Novel Benzimidazole-Based Chemosensor for Fluorometric Determination of Zinc Ions. J Fluoresc (2021).

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  • Chemosensor
  • Schiff base
  • Zinc ion
  • Benzimidazole