Volume 35, Issue 12 e6446
RESEARCH ARTICLE

Glucose electrocatalysts derived from mono- or dicarbene coordinated nickel(II) complexes and their mesoporous carbon composites

Zhoveta Yhobu

Zhoveta Yhobu

Centre for Nano and Material Sciences, Jain University, Bangalore, India

Department of Chemistry, School of Applied Sciences, REVA University, Bangalore, India

Contribution: Data curation (lead), Formal analysis (lead)

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Brinda K. N.

Brinda K. N.

Centre for Nano and Material Sciences, Jain University, Bangalore, India

Contribution: Data curation (supporting), Formal analysis (supporting), Validation (lead)

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Gautam Achar

Gautam Achar

Centre for Nano and Material Sciences, Jain University, Bangalore, India

Contribution: ​Investigation (supporting), Methodology (supporting), Validation (supporting)

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Jan Grzegorz Małecki

Jan Grzegorz Małecki

Institute of Chemistry, University of Silesia, Katowice, Poland

Contribution: ​Investigation (supporting), Methodology (lead)

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Rangappa S. Keri

Rangappa S. Keri

Centre for Nano and Material Sciences, Jain University, Bangalore, India

Contribution: Resources (supporting), Supervision (supporting)

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Nagaraju D. H.

Corresponding Author

Nagaraju D. H.

Department of Chemistry, School of Applied Sciences, REVA University, Bangalore, India

Correspondence

D. H. Nagaraju, Department of Chemistry, School of Applied Sciences, REVA University, Bangalore, India.

Email: [email protected]

Srinivasa Budagumpi, Centre for Nano and Material Sciences, Jain University, Bangalore, India.

Email: [email protected]; [email protected]

Contribution: Funding acquisition (lead), Methodology (supporting), Supervision (equal)

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Srinivasa Budagumpi

Corresponding Author

Srinivasa Budagumpi

Centre for Nano and Material Sciences, Jain University, Bangalore, India

Correspondence

D. H. Nagaraju, Department of Chemistry, School of Applied Sciences, REVA University, Bangalore, India.

Email: [email protected]

Srinivasa Budagumpi, Centre for Nano and Material Sciences, Jain University, Bangalore, India.

Email: [email protected]; [email protected]

Contribution: Conceptualization (lead), Supervision (lead)

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First published: 22 September 2021
Citations: 5

Funding information: Department of Science and Technology, New Delhi, India, Grant/Award Number: DST/TDT/DDP-33/2018

Abstract

Molecular electrocatalysts that contain a metal atom under precise ligand field in a definite geometry feasible for redox reactions has boundless significance in numerous electrocatalytic reactions. Herein, we report nickel-based molecular electrocatalysts anchored on the sterically varied 1,2,4-triazol-5-ylidene ligands. The two metal complexes bearing different ligand system wherein one is mono-NHC nickel(II) complex and the other is a bis-NHC nickel(II) complex were compared and studied in terms of morphology and electrochemical glucose sensing. The kinetics and sensitivity of the nickel(II) complexes were significantly enhanced by the mesoporous carbon and demonstrated high electrode sensitivity (2.57–124.92 μA mM−1 cm2) at a fixed potential towards glucose detection. The chronoamperometric studies evidenced the detection of glucose up to 27.5 mM with a linear range of detection up to 9.5 mM (LOD of 44.59 μM). The selectivity towards glucose in the presence of other blood constituents was investigated. Finally, the stability was studied after 18 days of electrode preparation, and negligible variation in the glucose sensing performance was found. The electrocatalysts prepared are found to be the viable candidates for potential engineering high-performance molecular non-enzymatic glucose sensor.

DATA AVAILABILITY STATEMENT

Data available on request from the authors.

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