Photoactive metal complexes are applied in a variety of fields, including solar energy conversion, catalysis and medicinal chemistry. Their effectiveness depends on the excited-state features that control the nature of photoreaction intermediates and photoproducts. For this reason, the structural determination of light-induced transient species is fundamental for a rational design of novel photoactive metal complexes. Among the available time-resolved methods, synchrotron-based techniques are emerging as successful tools in detecting ultrafast structural changes in molecules. The aim of this contribution is to review the results obtained by our group combining TR-XSS (Time-Resolved X-ray Solution Scattering) and TR-XAS (Time-Resolved X-ray Absorption Spectroscopy) to study the excited state dynamics in cis-[Ru(bpy)2(py)2]Cl2, a model compound for ligand releasing applications. Besides a comprehensive summary of our previous work, we report here new findings we obtained by analysis of 100 ps-resolution TR-XSS dataset. The potential of these techniques towards applications in catalysis are discussed in comparison to other time resolved spectroscopies.

Monitoring excited state dynamics in cis-[Ru(bpy)2(py)2]2+ by ultrafast synchrotron techniques

BORFECCHIA, ELISA;GARINO, Claudio;GOBETTO, Roberto;LAMBERTI, Carlo
2014-01-01

Abstract

Photoactive metal complexes are applied in a variety of fields, including solar energy conversion, catalysis and medicinal chemistry. Their effectiveness depends on the excited-state features that control the nature of photoreaction intermediates and photoproducts. For this reason, the structural determination of light-induced transient species is fundamental for a rational design of novel photoactive metal complexes. Among the available time-resolved methods, synchrotron-based techniques are emerging as successful tools in detecting ultrafast structural changes in molecules. The aim of this contribution is to review the results obtained by our group combining TR-XSS (Time-Resolved X-ray Solution Scattering) and TR-XAS (Time-Resolved X-ray Absorption Spectroscopy) to study the excited state dynamics in cis-[Ru(bpy)2(py)2]Cl2, a model compound for ligand releasing applications. Besides a comprehensive summary of our previous work, we report here new findings we obtained by analysis of 100 ps-resolution TR-XSS dataset. The potential of these techniques towards applications in catalysis are discussed in comparison to other time resolved spectroscopies.
2014
229
34
45
http://www.sciencedirect.com/science/article/pii/S0920586113006743
metal complexes; photochemistry; synchrotron ultrafast techniques; Time-resolved XAS; Time-resolved X-ray solution scattering; DFT
E. Borfecchia; C. Garino; D. Gianolio; L. Salassa; R. Gobetto; C. Lamberti
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/141464
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