Issue 10, 2017, Issue in Progress

Using a flexible bis(pyrazol) ligand to construct four new Keggin-based compounds: syntheses, structures and properties

Abstract

Using a flexible bis(pyrazol) ligand, four new compounds based on Keggin anions, namely [Cu(H2bdpm)2(H2O)2(HPW12O40)] (1), [Cu(H2bdpm)2(H2PW12O40)]2·2H2O (2), [Cu2(H2bdpm)3(H2O)2(SiW12O40)]·2H2O (3), and [Cu2(H2bdpm)4(H2O) (SiW12O40)]·16H2O (4) (H2bdpm = bis(3,5-dimethyl-1H-pyrazol-4-yl)methane), have been synthesized under hydrothermal conditions. Compound 1 is a zero dimension (0D) structure, showing a [Cu(H2bdpm)2]2+ mono-supporting [PW12O40]3− anion. Compound 2 shows a 1D supramolecular chain, with bi-supporting anions lined by discrete [PW12O40]3− anions. Compound 3 contains bi-nuclear Cu2+ cycles, which are linked by O4W to form a cycle-connecting-cycle chain. The [SiW12O40]4− anions connect adjacent chains to construct a 2D structure. Compound 4 contains a nested cycle subunit [Cu4(H2bdpm)6]8+, with two bi-nuclear cycles [Cu2(H2bdpm)2]4+ linked by two H2bdpm ligands. The nested cycle subunits are connected by H2bdpm molecules to construct a 2D metal–organic layer. The Keggin anions link adjacent layers to form a 3D framework. The electrochemical and photocatalytic properties of compounds 1–4 are studied.

Graphical abstract: Using a flexible bis(pyrazol) ligand to construct four new Keggin-based compounds: syntheses, structures and properties

Supplementary files

Article information

Article type
Paper
Submitted
13 Oct 2016
Accepted
28 Nov 2016
First published
19 Jan 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 5774-5781

Using a flexible bis(pyrazol) ligand to construct four new Keggin-based compounds: syntheses, structures and properties

A. Tian, H. Ni, X. Ji, Y. Tian, G. Liu and J. Ying, RSC Adv., 2017, 7, 5774 DOI: 10.1039/C6RA25156K

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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