Issue 41, 2014

Three novel d7/d10 metal complexes with N-heterocyclic ligand of 2,6-bis(3-pyrazolyl)pyridine: synthesis, structure, surface photovoltage spectroscopy and photocatalytic activity

Abstract

By introducing dicarboxylate acid ligands with flexible chains of different lengths as a second organic ligand, three complexes [Co22-ox)(H2L)2(HCOO)2] (1), [Co24-ad)0.5(HL)2]·(OH)·(H2O) (2), [Zn24-sub)0.5(HL)2]·(OH)·(H2O) (3) (H2L = 2,6-di-(5-phenyl-1H-pyrazol-3-yl)pyridine, ox = oxalic acid, ad = adipic acid, sub = suberic acid) were synthesized by a hydrothermal method. All complexes were characterized by elemental analysis, IR and UV-vis spectroscopy and single-crystal X-ray diffraction. Structural analysis reveals that in complex 1, the Co(II) atom was six-coordinated to form a distorted octahedron, while in complexes 2 and 3, the Co(II) and Zn(II) atoms were five-coordinated to form disordered tetragonal coordination geometries. Acting as a bridged ligand, the flexible dicarboxylate acid ligand in complex 1 coordinated with two metal atoms, while in complexes 2 and 3 it coordinated with four metal atoms. The surface photovoltage spectroscopy and photocatalytic activities of complexes 1, 2 and 3 were also investigated in detail.

Graphical abstract: Three novel d7/d10 metal complexes with N-heterocyclic ligand of 2,6-bis(3-pyrazolyl)pyridine: synthesis, structure, surface photovoltage spectroscopy and photocatalytic activity

Supplementary files

Article information

Article type
Paper
Submitted
08 Mar 2014
Accepted
03 Apr 2014
First published
04 Apr 2014

RSC Adv., 2014,4, 21180-21189

Author version available

Three novel d7/d10 metal complexes with N-heterocyclic ligand of 2,6-bis(3-pyrazolyl)pyridine: synthesis, structure, surface photovoltage spectroscopy and photocatalytic activity

Y. N. Hou, Z. N. Wang, F. Y. Bai, Q. L. Guan, X. Wang, R. Zhang and Y. H. Xing, RSC Adv., 2014, 4, 21180 DOI: 10.1039/C4RA02015D

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