An Organic‐Inorganic Hybrid Based on Keggin‐Type Polyoxometalate and Hypoxanthine: Synthesis, Structure, Stability, and Electrochemistry Properties

Abstract

The organic-inorganic hybrid H 5 [Ag 2 (hyp) 2 ] 2 [BW 12 O 40 ]· 9H 2 O (1) (hpy = hypoxanthine), based on Keggin-type polyoxometalate and hypoxanthine, was prepared by hydrothermal synthesis and characterized by single-crystal and powder X-ray diffraction, IR spectroscopy, elemental analysis, and thermogravimetry. The title com-925 pound has a two-dimensional layer structure constructed by Keggintype [BW 12 O 40 ] 5anion, silver, and the biomolecule hyp. In addition, compound 1 exhibited excellent stability and superior activity in the electro-catalytic oxidation of glucose.

Two New Preyssler‐Type Polyoxometalate‐Based Coordination Polymers and Their Application in Horseradish Peroxidase Immobilization

“…[18] POMs are characterized by highly negative charges, oxygen-rich surfaces, and abundant structures, [19] and more worthy of their unique biological compatibilities. [20] As ar esult, POMs may be an ew type of support materials for immobilizing enzymes. Compared with classical Keggin-or Dawson-type POMs,P reyssler-type POMs are promising candidatesf or the following attributes:1 )Preyssler anions are one of the biggest precursors that are highly negatively charged, which is of benefit for electrostatic interactions between enzymes and POMs; 2) Preyssler anions have an abundance of exposed surface oxygen atoms (30o xygen atoms), which can offer al arge number of active sites to link enzymes through hydrogen bonds; and 3) Preyssler-type POMs are very stable over aw ide pH range (1)(2)(3)(4)(5)(6)(7)(8)(9)(10) and at highert emperature (up to 300 8C).…”

“…Moreover, high loading capacities, good biocompatibilities, low cost, and being environmentally benign are also important for favorable supports . POMs are characterized by highly negative charges, oxygen‐rich surfaces, and abundant structures, and more worthy of their unique biological compatibilities . As a result, POMs may be a new type of support materials for immobilizing enzymes.…”