Use of symmetrical and pendant pyrazole derivatives for the construction of two polyoxometalate-based complexes as electrochemical sensors

Use of symmetrical and pendant pyrazole derivatives for the construction of two... Through the use of two pyrazole derivatives, one symmetrical, namely 1,1′-bis(3,5-dimethyl-1H-pyrazol-4-yl)methane (H2bdpm), and one asymmetrical, namely 4-propyl-4,5-dihydro-1H-pyrazole (pdp), two polyoxometalate (POM)-based complexes constructed from saturated Wells–Dawson and mono-Cu(II)-substituted Keggin anions, respectively, were hydrothermally synthesized and structurally characterized as [(Cu2(H2bdpm)2)[H2P2W18O62]0.5]·2H2O (1) and [(Cu3(pdp)6Cl2)(H5PMo11CuO39)2]·12H2O (2). In complex 1, the bidentate H2bdpm ligands link CuI centers to form a 1D wave-like metal–organic chain. Adjacent chains are parallel with each other, with Wells–Dawson anions occupying the gaps. In complex 2, six pdp ligands are coordinated to three CuII centers to form a trinuclear cluster. Two Cl− anions are also coordinated to the copper centers. The mono-Cu(II)-substituted Keggin anions connect the trinuclear clusters to construct a 2D grid-like structure. Both 1 and 2 are semiconducting in nature, with Eg valves of 2.61 and 2.81, respectively. The electrochemical behavior of both complexes has been studied. Carbon paste electrodes of both can be used as electrochemical sensors for the detection of hydrogen peroxide, bromate and nitrite. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Transition Metal Chemistry Springer Journals

Use of symmetrical and pendant pyrazole derivatives for the construction of two polyoxometalate-based complexes as electrochemical sensors

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer International Publishing AG, part of Springer Nature
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry; Organometallic Chemistry
ISSN
0340-4285
eISSN
1572-901X
D.O.I.
10.1007/s11243-018-0250-4
Publisher site
See Article on Publisher Site

Abstract

Through the use of two pyrazole derivatives, one symmetrical, namely 1,1′-bis(3,5-dimethyl-1H-pyrazol-4-yl)methane (H2bdpm), and one asymmetrical, namely 4-propyl-4,5-dihydro-1H-pyrazole (pdp), two polyoxometalate (POM)-based complexes constructed from saturated Wells–Dawson and mono-Cu(II)-substituted Keggin anions, respectively, were hydrothermally synthesized and structurally characterized as [(Cu2(H2bdpm)2)[H2P2W18O62]0.5]·2H2O (1) and [(Cu3(pdp)6Cl2)(H5PMo11CuO39)2]·12H2O (2). In complex 1, the bidentate H2bdpm ligands link CuI centers to form a 1D wave-like metal–organic chain. Adjacent chains are parallel with each other, with Wells–Dawson anions occupying the gaps. In complex 2, six pdp ligands are coordinated to three CuII centers to form a trinuclear cluster. Two Cl− anions are also coordinated to the copper centers. The mono-Cu(II)-substituted Keggin anions connect the trinuclear clusters to construct a 2D grid-like structure. Both 1 and 2 are semiconducting in nature, with Eg valves of 2.61 and 2.81, respectively. The electrochemical behavior of both complexes has been studied. Carbon paste electrodes of both can be used as electrochemical sensors for the detection of hydrogen peroxide, bromate and nitrite.

Journal

Transition Metal ChemistrySpringer Journals

Published: Jun 5, 2018

References

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