A novel organic-inorganic hybrid assembled by [Mo8O26]4 clusters and {Cu(pic)2} units: Synthesis, crystal structure and electrochemical sensing properties

• Published in: Journal of molecular structure 2022-11, Vol.1267, p.133662, Article 133662
• Main Authors: Gao, Qiao, Fang, Xiao-Xue, Luo, Hao-Ming, Yang, Jing, Lin, Zhe
• Format: Article
• Language: English
• Subjects: Electrochemical properties; H2O2 detection; Octamolybdate; Organic-inorganic hybrid
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2022.133662

•A new hybrid was isolated by in situ self-assembly synthesis method and fully characterized.•Compound 1 presents the 2D architecture formed by bridging {Mo8O26Cu(pic)2}n chains with {Cu2(pic)4}n polymers.•Compound 1 shows good electrocatalytic activity for the reduction of H2O2.•1-CPE exhibits a wide linear range (20–220 µM), high sensitivity of 0.027 µA·µM-1 and a low detection limit of 3.34 µM for H2O2 detection.•A novel inorganic-organic hybrid presents a 2D framework based on the 1D {Mo8O26Cu(pic)2}n chains linked alternately with the {Cu2(pic)4}n polymers, which shows electrochemical sensing performance for the detection of H2O2. The rational design of crystalline materials coupled with polyoxometalate as electrocatalyst is an effective strategy for the sensitive electrochemical detection of H2O2. Here, a novel organic-inorganic hybrid complex [NH4]4[Cu(pic)2]3[Mo8O26] (1) (Hpic=2-picolinic acid) was synthesized via in situ self-assembly synthesis method and fully characterized. Structural analysis reveals that compound 1 adopts a two-dimensional (2D) layered structure based on the 1D {Mo8O26Cu(pic)2}n chains linked with the {Cu2(pic)4}n polymers via Cu-O bridge. The morphology of 1 features a columnar construct, smooth surface and sharp fringes with an average size of