CLICK 'n' Sleep: Light‐Switch Behavior of Triazole‐Containing Tris(bipyridyl)ruthenium Complexes. Issue 31 (6th October 2016)

• Record Type: Journal Article
• Authors: Braumüller, Markus; Staniszewska, Magdalena; Guthmuller, Julien; Rau, Sven
• Is Part Of: European journal of inorganic chemistry. Issue 31(2016)
• Page Start: 4958
• Page End: 4963
• Publication Date: 2016-10-06
• Subjects: Click chemistry -- Triazole -- Light switch -- Ruthenium -- TDDFT calculations; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201600964
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : A set of Ru II complexes incorporating triazole subunits are presented. They show a solvent‐dependent light‐switch effect. Theoretical calculations revealed the excited states involved in the emission process. The findings are highly important for future design of light‐switch sensors and suggest a severe restriction for functional photomolecular devices synthesized by CLICK chemistry. Abstract : The effect of a triazole moiety on the luminescence intensity of corresponding ruthenium complexes is discussed. The presence of a triazole moiety leads to enhanced sensitivity of the emissive properties towards solvent properties or apparent proton concentration. The increase of the water content always leads to a significantly lower emission intensity at high water contents. Based on theoretical investigations light‐driven charge transfer involving the triazole is proposed as rational explanation. This study shows a very important limitation for the application of CLICK chemistry for the implementation of such ruthenium complexes for water splitting catalysis or sensing.