NDLI: Bidirectional photoswitching of magnetic properties at room temperature: ligand-driven light-induced valence tautomerism

Content Provider	Royal Society of Chemistry (RSC)
Author	Khusniyarov, Marat M. Witt, Alexander Heinemann, Frank W.
Copyright Year	2015
Abstract	Valence tautomeric (VT) metal complexes are highly promising bistable molecular compounds for applications as molecular switches in molecular electronics and spintronics. Although VT species can be switched with light, the photoswitching in all reported systems requires very low temperatures (usually below 20 K) because photoinduced states are highly unstable at room temperature. The thermal instability hinders any practical application of these complexes in genuine devices. In this report, for the first time we demonstrate photoswitching of VT species and associated magnetic properties at room temperature. The bidirectional photoswitching in solution is due to cis–trans photoisomerizable 4-styrylpyridine ligands deliberately integrated into cobalt dioxolene molecular complexes. The novel type of photoswitching has been coined Ligand-Driven Light-Induced Valence Tautomerism (LD-LIVT). The photoconversion of VT states of 28% has been achieved in solution at room temperature. The photoinduced states show extraordinary thermal stability for hours at room temperature, as compared to common nanoseconds reported previously. The switching proceeds at molecular level with the effective photoswitching rate of 3 × 1013 molecules per s under our conditions. Consequently, this work may open new horizons in applications of molecular switches based on VT metal complexes in molecular devices functioning at room temperature.
Starting Page	4599
Ending Page	4609
Page Count	11
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	6
Issue Number	8
Journal	Chemical Science
DOI	10.1039/c5sc00130g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Molecular electronics Valence Photoisomerization Cobalt Spintronics
Content Type	Text
Resource Type	Article
Subject	Chemistry

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