Highlights of metal ion-based photochemical switches

•Photochemical switches based on metal complexes are reviewed.•The considered switches are mostly based on photo-bistable systems and complexation/decomplexation processes.•Selected ligands comprise azobenzene, azopyridines, diarylethenes, spiropyranes, spiropyroxazines and rhodamine.•Few switching...

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Bibliographic Details
Published in:Coordination chemistry reviews 2014-02, Vol.260, p.156-215
Main Authors: Bianchi, Antonio, Delgado-Pinar, Estefanía, García-España, Enrique, Giorgi, Claudia, Pina, Fernando
Format: Article
Language:English
Subjects:
Azobenzene
Bistable compounds
Diarylethenes
Photochemical switches
Photoisomerization
Rhodamine
Spiropyranes
Spiropyroxazines
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Summary:•Photochemical switches based on metal complexes are reviewed.•The considered switches are mostly based on photo-bistable systems and complexation/decomplexation processes.•Selected ligands comprise azobenzene, azopyridines, diarylethenes, spiropyranes, spiropyroxazines and rhodamine.•Few switching processes related to logic gates and memories are reported. Selected metal complexes behaving as photochemical switches, mostly operating by light emission/absorption without the intervention of any added chemical species, are reviewed. First, the switching mechanisms are analyzed to offer readers an easier understanding of the described systems. Examples of photochemical switching based on complexation/decomplexation processes and photo-bistable systems, comprising metal complexes with azobenzene, azopyridine, diarylethene, spirocyclic and rhodamine ligands, make the central body of the review. These examples were chosen to provide an overview of the evolution of metal-ion based photochemical switches, collecting together historical cases and more recent systems mainly reported in the last 15 years.
ISSN:0010-8545
1873-3840
DOI:10.1016/j.ccr.2013.09.023