Issue 5, 2013

Structural, magnetic and optical properties of an FeIII dimer bridged by the meridional planar divergent N,N′-bis(salicyl)hydrazide and its photo- and electro-chemistry in solution

Abstract

{FeIIICl(DMF)2}2(L) where L is N,N′-bis(salicyl)hydrazide has been synthesized as red crystals and characterized using single-crystal diffraction, infrared and UV-vis spectroscopies, and its magnetic properties studied. The dimeric unit in the structure is formed through the two meridional sets of divergent O, N, O coordinating atoms of the hexacoordinated and quadruply charged ligand. With the presence of the inversion symmetry the Fe atoms are strictly planar with the ligand. The magnetic exchange interaction is found to be antiferromagnetic with a J = −5.98(3) cm−1 through the rare Fe–N–N–Fe pathway. Irradiation of the FeCl3/H4L red DMF solution in the visible region of the spectrum resulted in its complete discoloration and from which the unknown colorless salt [FeII(DMF)6][FeIICl4] and the neutral ligand have been identified by single crystal diffraction. The UV-visible spectra of FeCl3, H4L and their mixture in DMF solution indicate that the iron complex is the absorbing species and the presence of the free ligand in the irradiated solution suggests that the ligand is potentially acting as a catalyst to the photoreduction of FeIII to FeII, while electrochemistry points to a mixed-valent (FeII–FeIII) intermediate in the process.

Graphical abstract: Structural, magnetic and optical properties of an FeIII dimer bridged by the meridional planar divergent N,N′-bis(salicyl)hydrazide and its photo- and electro-chemistry in solution

Supplementary files

Article information

Article type
Paper
Submitted
01 Oct 2012
Accepted
29 Oct 2012
First published
30 Oct 2012

Dalton Trans., 2013,42, 1406-1416

Structural, magnetic and optical properties of an FeIII dimer bridged by the meridional planar divergent N,N′-bis(salicyl)hydrazide and its photo- and electro-chemistry in solution

K. Cheaib, D. Martel, N. Clément, F. Eckes, S. Kouaho, G. Rogez, S. Dagorne, M. Kurmoo, S. Choua and R. Welter, Dalton Trans., 2013, 42, 1406 DOI: 10.1039/C2DT32310A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements