Organophosphonic Acid-Regulating Assembly of PV–SbIII Polyoxotungstate and Its Potential in Building a Dual-Signal Readout Electrochemical Aptasensor for Carcinogen Detection

Template-directed assembly of giant cluster-based nanomaterials is an everlasting theme in cluster science. In this work, ethylenediamine tetramethylphosphonic acid [H8EDTPA = (POCH2(OH)2)4C2H4N2] and [B-α-SbW9O33]9– were, respectively, used as an organic template and an inorganic template to prepar...

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Veröffentlicht in:Inorganic chemistry 2022-09, Vol.61 (37), p.14648-14661
Hauptverfasser: Tang, Zhigang, Wang, Menglu, Jia, Xiaodan, Xie, Saisai, Chen, Pei, Wang, Dan, Chen, Lijuan, Zhao, Junwei
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Sprache:eng
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Zusammenfassung:Template-directed assembly of giant cluster-based nanomaterials is an everlasting theme in cluster science. In this work, ethylenediamine tetramethylphosphonic acid [H8EDTPA = (POCH2(OH)2)4C2H4N2] and [B-α-SbW9O33]9– were, respectively, used as an organic template and an inorganic template to prepare an organophosphonic acid-regulating PV–SbIII-heteroatom-inserted polyoxotungstate aggregate [H2N­(CH3)2]5Na11H9[CeW4O10(HEDTPA)­SbW15O50]­[B-α-SbW9O33]2·36H2O (1). Noteworthily, organophosphonic acid ligand not only works as an organic template leading to the assembly of a [HEDTPASbW15O50]14– building block but also further bridges the sandwich-type [CeW4O10(B-α-SbW9O33)2]11– entity. To extend its potential application in electrochemical sensing properties, we prepared a three-dimensional 1@EGO composite (EGO = reduced graphene oxide functionalized by ethylenediamine) with porous architecture and a prominent conducting ability. Furthermore, the 1@EGO composite was explored as a modification material for glassy carbon electrodes to build a dual-signal readout electrochemical aptasensor for carcinogens, which shows much better detection performance for aflatoxin B1 compared with traditional single-signal biosensors
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.2c02003