Issue 2, 2016

3d transition metal complexes with a julolidine–quinoline based ligand: structures, spectroscopy and optical properties

Abstract

A Schiff base type ligand with the combination of the julolidine and the quinoline groups has been reported as a potential chemosensor in detecting the cobalt(II) ion among other heavy and transition metal ions in solution. However, no crystal structure of such a ligand with any metal ions has been reported. In this work, its complexation with 3d transition metal ions (Mn(II), Co(II), Ni(II), Cu(II) and Zn(II)) has been investigated with five new complexes being synthesised, and spectroscopically and structurally characterised. [Mn2L2(CH3OH)2(CH3COO)2]·CH3OH (1) {HL (C22H21N3O) = ((E)-9-((quinolin-8-ylimino)methyl)-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinolin-8-ol)} shows a dinuclear structure with two Mn : L : acetate (1 : 1 : 1) units bridged by two methanol molecules. [CoL2(NO3)]·CH3OH·H2O (2) and [NiL2]·H2O (3) exhibit mononuclear structures with a Co : L or Ni : L ratio of 1 : 2. [CuL(CH3COO)]·1/3CH3OH (4) demonstrates a mononuclear structure and the Cu ion has a square planar coordination polyhedron with a L ligand and a highly non-symmetrical acetate anion. [Zn2L2(CH3COO)2]·CH3OH (5) has two types of dinuclear units, both with two ZnL units bridged by two acetate anions but in three different bridging coordination modes. Their vibrational modes, absorption and photoluminescence properties have also been investigated.

Graphical abstract: 3d transition metal complexes with a julolidine–quinoline based ligand: structures, spectroscopy and optical properties

Supplementary files

Article information

Article type
Research Article
Submitted
14 Oct 2015
Accepted
03 Dec 2015
First published
07 Dec 2015

Inorg. Chem. Front., 2016,3, 286-295

Author version available

3d transition metal complexes with a julolidine–quinoline based ligand: structures, spectroscopy and optical properties

D. J. Fanna, Y. Zhang, L. Li, I. Karatchevtseva, N. D. Shepherd, A. Azim, J. R. Price, J. Aldrich-Wright, J. K. Reynolds and F. Li, Inorg. Chem. Front., 2016, 3, 286 DOI: 10.1039/C5QI00200A

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