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<p>In this paper, two new copper(I) coordination polymers (CPs), formulated as {[Cu(L<sup>1</sup>)](BF<sub>4</sub>)·2CH<sub>2</sub>Cl<sub>2</sub>}<sub>n</sub> (<b>1</b>) and {[Cu(L<sup>2</sup>)](BF<sub>4</sub>)·CH<sub>3</sub>CN}<sub>n</sub> (<b>2</b>) (L<sup>1</sup> = (2,2′- (1,3-propanediyl)-6,6′-bis(3-methylpyridine)bis-1,3-benzimidazole, L<sup>2</sup> = (2,2′ - (1,4-butanediyl)-7,7′-bis(3-methylpyridine)bis-1,3-benzimidazole), were synthesized and characterized. Structural analysis reveals that both CP <b>1</b> and <b>2</b> exhibit one-dimensional chain structures. The glassy carbon electrodes (CCP <b>1</b>/GCE and CCP <b>2</b>/GCE) modified with copper(I) coordination polymers were characterized using cyclic voltammetry. The electrocatalytic sensing performance of these modified electrodes toward glucose was systematically investigated using chronoamperometry. Experimental results demonstrate that in 0.1&#xa0;M NaOH solution, both CCP <b>1</b>/GCE and CCP <b>2</b>/GCE display high selectivity, rapid response and a good linear response to glucose over the concentration range of 0.5 µM to 4 mM. The limits of detection (S/<i>N</i> = 3) were determined to be 0.029 µM and 0.061 µM, respectively. Compared with CCP <b>2</b>/GCE, CCP <b>1</b>/GCE shows higher electrocatalytic activity toward glucose, which can be attributed to the bicyclic-linked one-dimensional chain structure of CP <b>1</b> that provides more electroactive sites, thereby enhancing the sensing performance. Moreover, in practical sample tests, the recovery rates for glucose detection ranged from 96.4% to 103.3%, indicating high accuracy. This work offers a new strategy for the development of coordination‑polymer‑based electrochemical sensors.</p> Graphical abstract <p>Two new copper(I) coordination polymers (CPs) were synthesized and characterized. The electrochemical sensing properties of the glassy carbon electrodes (CCP <b>1</b>/GCE and CCP <b>2</b>/GCE) modified with copper(I) CPs were investigated using chronoamperometry (CA) in 0.1 M NaOH for glucose. Results from successive spike‑recovery tests, anti‑interference experiments, and stability assessments demonstrated that both CCP <b>1</b>/GCE and CCP <b>2</b>/GCE sensors exhibit good selectivity, high sensitivity, and excellent stability toward glucose, indicating promising potential for practical applications.</p> <p></p>

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Development of electrochemical sensors based on azacycle copper(I) coordination polymers for determination of glucose

  • 期刊论文

  • 发表日期：

    2026年5月14日

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  • Yicheng Wang,
  • Nini Wu,
  • Wenjing Zhao,
  • Qi He,
  • Rongrong Gao,
  • Huilu Wu

摘要

In this paper, two new copper(I) coordination polymers (CPs), formulated as {[Cu(L1)](BF4)·2CH2Cl2}n (1) and {[Cu(L2)](BF4)·CH3CN}n (2) (L1 = (2,2′- (1,3-propanediyl)-6,6′-bis(3-methylpyridine)bis-1,3-benzimidazole, L2 = (2,2′ - (1,4-butanediyl)-7,7′-bis(3-methylpyridine)bis-1,3-benzimidazole), were synthesized and characterized. Structural analysis reveals that both CP 1 and 2 exhibit one-dimensional chain structures. The glassy carbon electrodes (CCP 1/GCE and CCP 2/GCE) modified with copper(I) coordination polymers were characterized using cyclic voltammetry. The electrocatalytic sensing performance of these modified electrodes toward glucose was systematically investigated using chronoamperometry. Experimental results demonstrate that in 0.1 M NaOH solution, both CCP 1/GCE and CCP 2/GCE display high selectivity, rapid response and a good linear response to glucose over the concentration range of 0.5 µM to 4 mM. The limits of detection (S/N = 3) were determined to be 0.029 µM and 0.061 µM, respectively. Compared with CCP 2/GCE, CCP 1/GCE shows higher electrocatalytic activity toward glucose, which can be attributed to the bicyclic-linked one-dimensional chain structure of CP 1 that provides more electroactive sites, thereby enhancing the sensing performance. Moreover, in practical sample tests, the recovery rates for glucose detection ranged from 96.4% to 103.3%, indicating high accuracy. This work offers a new strategy for the development of coordination‑polymer‑based electrochemical sensors.

Graphical abstract

Two new copper(I) coordination polymers (CPs) were synthesized and characterized. The electrochemical sensing properties of the glassy carbon electrodes (CCP 1/GCE and CCP 2/GCE) modified with copper(I) CPs were investigated using chronoamperometry (CA) in 0.1 M NaOH for glucose. Results from successive spike‑recovery tests, anti‑interference experiments, and stability assessments demonstrated that both CCP 1/GCE and CCP 2/GCE sensors exhibit good selectivity, high sensitivity, and excellent stability toward glucose, indicating promising potential for practical applications.