Issue 47, 2020

Bifunctional Fe(ii) spin crossover-complexes based on ω-(1H-tetrazol-1-yl) carboxylic acids

Abstract

To increase the supramolecular cooperativity in Fe(II) spin crossover materials based on N1-substituted tetrazoles, a series of ω-(1H-tetrazol-1-yl) carboxylic acids with chain-lengths of C2–C4 were synthesized. Structural characterization confirmed the formation of a strong hydrogen-bond network, responsible for enhanced cooperativity in the materials and thus largely complete spin-state transitions for the ligands with chain lenghts of C2 and C4. To complement the structural and magnetic investigation, electronic spectroscopy was used to investigate the spin-state transition. An initial attempt to utilize the bifunctional coordination ability of the ω-(1H-tetrazol-1-yl) carboxylic acids for preparation of mixed-metallic 3d–4f coordination polymers resulted in a novel one-dimensional gadolinium-oxo chain system with the ω-(1H-tetrazol-1-yl) carboxylic acid acting as μ221 chelating–bridging ligand.

Graphical abstract: Bifunctional Fe(ii) spin crossover-complexes based on ω-(1H-tetrazol-1-yl) carboxylic acids

Supplementary files

Article information

Article type
Paper
Submitted
23 Sep 2020
Accepted
26 Oct 2020
First published
26 Oct 2020
This article is Open Access
Creative Commons BY license

Dalton Trans., 2020,49, 17183-17193

Bifunctional Fe(II) spin crossover-complexes based on ω-(1H-tetrazol-1-yl) carboxylic acids

W. Zeni, M. Seifried, C. Knoll, J. M. Welch, G. Giester, B. Stöger, W. Artner, M. Reissner, D. Müller and P. Weinberger, Dalton Trans., 2020, 49, 17183 DOI: 10.1039/D0DT03315D

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