Two silver(I) complexes: Synthesis, structures, and electrochemicalH₂O₂sensing

Abstract

Two new silver(I) complexes, formulated as [Ag2(L1)2](picrate)2 (1), {[Ag2(L2)2(terephthalate)](C2H5OH)3(H2O)}n (2) (L1 = 1,3‐bis(2‐benzimidazyl)benzene, L2 = 1,3‐bis(1‐methylbenzimidazol‐2‐yl)‐2‐thiapropane), were synthesized and characterized by X‐ray crystallography, elemental analysis, infrared, and UV–Vis spectroscopy. The crystal analysis results showed that the complexes exhibited different structures: binuclear for 1 and one‐dimensional polymeric for 2. Their Ag(I) centers displayed different coordination geometric structures: two‐coordinated linear in 1, whereas four‐coordinated distorted tetrahedron in 2. The electrochemical sensing performance of Ag(I) complexes modified carbon paste electrode (CPE‐1 and CPE‐2) toward hydrogen peroxide (H2O2) was evaluated by chronoamperometry in 0.2 M phosphate buffer saline (pH = 6) at −0.2 V. The CPE‐1 was found to have a wide linear response from 1.0 × 10−5 to 4.0 × 10−3 M, lower detection limit of 1.73 μM, excellent anti‐interference ability, and stability. The CPE‐2 does not have recognition properties for H2O2, which may be due to the large steric hindrance around Ag(I) centers that is not easy to combine with H2O2 to form a catalytic transition state. The above studies proved that Ag(I) complexes can be used as effective components of electrode materials for the electrochemical recognition of H2O2.

Nanomaterial with Core–Shell Structure Composed of {P2W18O62} and Cobalt Homobenzotrizoate for Supercapacitors and H2O2-Sensing Applications

“…According to the figure, when {P 2 W 18 }@Co-BTC-GCE was used as the electrochemical sensor to detect H 2 O 2 , the linear equations were I(μA) = −106.806–61.114 C(mM) and R 2 = 0.995 and the detection limit was 0.633 μM (S/N = 3). The sensitivity was 8.65 mA mM −1 cm −2 and the total linear range was 1.9 μM~1.67 mM, superior to literature reports [ 76 , 77 , 78 , 79 ]. The linear range may be due to the large specific surface area and porosity of the POMOF core–shell structure, which facilitates the homogeneous dispersion of precursors and the transfer of electrons to the internal structure, thereby improving the reaction kinetics on the surface of the electrode material [ 80 ].…”

One‐Pot Synthesis of Nanoflower‐Like Zn2SnS4 as Nanozymes for Highly Sensitive Electrochemical Detection of H2O2 Released by Living Cells

“…[2,3] The development of efficient and reliable modus for the sensitive and selective detection of H 2 O 2 under physiological conditions is of paramount importance. In the past two decades, a variety of methods have been utilized to H 2 O 2 detection, including colorimetry, [4] spectrometry, [5] chemiluminescence, [6] positron emission tomography, [7] electrochemical methods, [8] and more comparison of the analytical performance of other assay methods on H 2 O 2 detection have been exhibited in Table S-1. The electrochemical method has garnered significant attention due to its inherent simplicity, rapidity, ease of handling, and cost-effectiveness.…”

Study for the hydrogen evolution reaction of doped carbon paste composite electrodes with multinuclear Ag(I) complexes based on nitrogen heterocyclic ligand

“…On the one hand, Ag(I) ions, as classical d 10 transition metals, are characterized by diverse structures and easy to be tuned, which can form diverse geometrical structures [31][32][33]. On the other hand, compared with other metals, Ag(I) complex as the active site of complex catalyst plays an important role in the redox reaction [34]. These characteristics suggest that Ag(I) complexes are potential catalysts for HER.…”