Using Redox-Active π Bridging Ligand as a Control Switch of Intramolecular Magnetic Interactions | Sciact - CRIS-system of Boreskov Institute of Catalysis

Using Redox-Active π Bridging Ligand as a Control Switch of Intramolecular Magnetic Interactions Full article

Journal

Journal of the American Chemical Society
ISSN: 0002-7863 , E-ISSN: 1520-5126

Output data

Year: 2019, Volume: 141, Number: 19, Pages: 7721-7725 Pages count : 5 DOI: 10.1021/jacs.9b03044

Tags

GROUND-STATE; COMPLEXES

Authors

Ma Xiaozhou ^1,2 , Suturina Elizaveta A. ³ , Rouzières Mathieu ^1,2 , Platunov Mikhail ⁴ , Wilhelm Fabrice ⁴ , Rogalev Andrei ⁴ , Clérac Rodolphe ^1,2 , Dechambenoit Pierre ^1,2

Affiliations

1	CNRS, CRPP, UMR 5031, Pessac F-33600, France
2	Univ. Bordeaux, CRPP, UMR 5031, Pessac F-33600, France
3	Centre for Sustainable Chemical Technologies (CSCT), University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
4	ESRF-The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France

Intramolecular magnetic interactions in the dinuclear complexes [(tpy)Ni(tphz)Ni(tpy)](n+) (n = 4, 3, and 2; tpy, terpyridine; tphz, tetrapyridophenazine) were tailored by changing the oxidation state of the pyrazine-based bridging ligand. While its neutral form mediates a weak antiferromagnetic (AF) coupling between the two S = 1 Ni(II), its reduced form, tphz(center dot-), promotes a remarkably large ferromagnetic exchange of +214(5) K with Ni(II) spins. Reducing twice the bridging ligand affords weak Ni-Ni interactions, in marked contrast to the Co(II) analogue. Those experimental results, supported by a careful examination of the involved orbitals, provide a clear understanding of the factors which govern strength and sign of the magnetic exchange through an aromatic bridging ligand, a prerequisite for the rational design of strongly coupled molecular systems and high T-C molecule-based magnets.

Ma X. , Suturina E.A. , Rouzières M. , Platunov M. , Wilhelm F. , Rogalev A. , Clérac R. , Dechambenoit P.
Using Redox-Active π Bridging Ligand as a Control Switch of Intramolecular Magnetic Interactions

Journal of the American Chemical Society. 2019. V.141. N19. P.7721-7725. DOI: 10.1021/jacs.9b03044 WOS Scopus РИНЦ AN OpenAlex

Full text from publisher

Submitted:	Mar 27, 2019
Published online:	Apr 26, 2019
Published print:	May 15, 2019

Web of science:	WOS:000468366900013
Scopus:	2-s2.0-85065758947
Elibrary:	38980541
Chemical Abstracts:	2019:847238
OpenAlex:	W2941160447

DB	Citing
Web of science	30
Scopus	30
OpenAlex	28