Reversible Photo-and Thermo-Induced Spin-State Switching in a Heterometallic 5d-3d W2Fe2Molecular Square Complex

Kaushik, K and Ghosh, S and Kamilya, S and Rouzières, M and Mehta, S and Mondal, A (2021) Reversible Photo-and Thermo-Induced Spin-State Switching in a Heterometallic 5d-3d W2Fe2Molecular Square Complex. In: Inorganic Chemistry, 60 (10). pp. 7542-7552.

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Abstract

Following the complex-as-a-ligand strategy, self-assembly of W(CN)83- and iron(II) with bidentate nitrogen donor ligand bik (bik = bis(1-methyl-1H-imidazol-2-yl)ketone) ligand affords a cyanide-bridged W2Fe2 molecular square complex HNBu32{W(CN)82Fe(bik)22}·6H2O·CH3OH (1). The complex was characterized by single-crystal X-ray diffraction analyses, (photo)magnetic studies, optical reflectivity, electrochemical studies, and spectroscopic studies. Structural analyses revealed that in the W2Fe2 square motif tungsten(V) and iron(II) centers reside in an alternate corner of the square and are bridged by the cyanide ligands. Complex 1 exhibits thermo-induced spin crossover (SCO) between {WV (S = 1/2)-FeIILS (S = 0)} and {WV (S = 1/2)-FeIIHS (S = 2)} pairs near room temperature and photoinduced spin-state switching with TLIESST = 70 K under light irradiation at low temperature. To the best of our knowledge, 1 represents the first complex containing iron(II) and WV(CN)83- units exhibiting both SCO and photomagnetic effect. © 2021 American Chemical Society.

Item Type:	Journal Article
Publication:	Inorganic Chemistry
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to American Chemical Society
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	16 Aug 2021 07:26
Last Modified:	16 Aug 2021 07:26
URI:	http://eprints.iisc.ac.in/id/eprint/69203

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