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First series of mixed (PIII, SeIV)-heteroatoms oriented rare-earth embedded polyoxotungstates containing distinct building blocks

Abstract

By a self-assembly reaction strategy accompanying the step-by-step introducing simple reactants, a series of unprecedented mixed-heteroatom-oriented rare-earth embedded heteropolyoxotungstates [H2N(CH3)2]12Na2[RE2(H2O)7(W4O9)(HPSeW15O54) (SeW9O33)2]·44H2O (RE = Ce3+ (1), Pr3+ (2), Nd3+ (3), Sm3+ (4), Gd3+ (5), Tb3+ (6)) were triumphantly achieved. It is worth highlighting that their polyoxoanions are synergistically established by two trivacant Keggin SeIV-inserted [B-α-SeW9O33]8− clusters and one trivacant Dawson PIII-and-SeIV-inserted [HPSeW15O54]10− segment. Momentously, [HPSeW15O54]10− is rarely reported polyoxometalate (POM) unit and can be viewed as a new member derived from one plenary Dawson PIII-and-SeIV-inserted polyoxoanion by removing three {WO6} octahedra in the polar position. Moreover, the composite of 1 and carboxyl functionalized multi-walled carbon nanotube (CMWCNT) was modified onto glass carbon electrode (GCE) to construct the 1@CMWCNT-GCE electrochemical sensor (ECS). In the PBS buffer (pH = 7.00), we investigated electrochemical sensing properties of 1@CMWCNT-GCE ECS toward simultaneously detecting dopamine (DA) and uric acid (UA). The 1@CMWCNT-GCE ECS exhibits good sensing performances toward DA and UA with low detection limit (1.61 μmol/L for DA and 5.41 μmol/L for UA) and high stability. This work not only shows that synergistic interaction of diverse HAs can facilitate to create captivating structures of POMs, but also promotes the applications of POM-based materials in recognizing bioactive molecules.

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Supplementary files

Article information


Submitted
26 Aug 2020
Accepted
08 Oct 2020
First published
10 Oct 2020

Inorg. Chem. Front., 2020, Accepted Manuscript
Article type
Research Article

First series of mixed (PIII, SeIV)-heteroatoms oriented rare-earth embedded polyoxotungstates containing distinct building blocks

L. Liu, J. JIang, X. Liu, G. Liu, D. Wang, L. Chen and J. Zhao, Inorg. Chem. Front., 2020, Accepted Manuscript , DOI: 10.1039/D0QI01031F

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