Issue 2, 2011

Influence of metal–ligand ratio on benzimidazole based luminescent lanthanide complexes: 3-D network structures and chloride anion binding

Abstract

Reaction of LnCl3·6H2O with the benzimidazole based ligand 2-(1H-benzoimidazol-2-yl)-4-bromo-6-methoxy-phenol (HL) in EtOH or MeOH under reflux gave dinuclear complexes of formula [Ln2(HL)2Cl6(solv)4] (solv = EtOH or MeOH) with a ligand : metal ratio = 1 : 1 (Ln = Tb(1); Er(2); Gd(3); Yb(4)). A ligand : metal ratio of 2 : 1 under similar conditions gave the mononuclear complexes [Eu(HL)2Cl3(MeOH)] (5) and [Ln(HL)2(H2O)4]·3Cl (Ln = Er(6); Yb(7)). A ligand : metal stoichiometry of 4 : 1 gave complexes [Ln(HL)4H2O]·3Cl (Ln = Nd(8); Gd (9); Eu(10)). The compounds have been structurally characterized by single crystal X-ray diffraction studies and their photophysical properties investigated.

Graphical abstract: Influence of metal–ligand ratio on benzimidazole based luminescent lanthanide complexes: 3-D network structures and chloride anion binding

Supplementary files

Article information

Article type
Paper
Submitted
02 Jul 2010
Accepted
17 Oct 2010
First published
05 Nov 2010

New J. Chem., 2011,35, 310-318

Influence of metal–ligand ratio on benzimidazole based luminescent lanthanide complexes: 3-D network structures and chloride anion binding

X. Yang, R. A. Jones, M. M. Oye, M. Wiester and R. J. Lai, New J. Chem., 2011, 35, 310 DOI: 10.1039/C0NJ00518E

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