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

Journal article


Publication Details

Author(s): Witt A, Heinemann F, Khusniyarov M
Journal: Chemical Science
Publisher: Royal Society of Chemistry
Publication year: 2015
Volume: 6
Pages range: 4599-4609
ISSN: 2041-6520


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 x 10(13) 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.


FAU Authors / FAU Editors

Heinemann, Frank Dr.
Lehrstuhl für Anorganische und Allgemeine Chemie
Khusniyarov, Marat PD Dr.
Department Chemie und Pharmazie
Witt, Alexander
Naturwissenschaftliche Fakultät


How to cite

APA:
Witt, A., Heinemann, F., & Khusniyarov, M. (2015). Bidirectional photoswitching of magnetic properties at room temperature: ligand-driven light-induced valence tautomerism. Chemical Science, 6, 4599-4609. https://dx.doi.org/10.1039/c5sc00130g

MLA:
Witt, Alexander, Frank Heinemann, and Marat Khusniyarov. "Bidirectional photoswitching of magnetic properties at room temperature: ligand-driven light-induced valence tautomerism." Chemical Science 6 (2015): 4599-4609.

BibTeX: 

Last updated on 2018-23-07 at 12:08