Work

Ultrafast Dissipation via Interligand Electron Transfer in {Ru(tpy)(bpy)} Chromophores

Year: 2025

Type: article

Abstract: complexes with R-bpy = 4,4'-dimethylamino-2,2'-bipyridine (dMAb), 4,4'-dimethoxy-2,2'-bipyridine (dMeOb), 2,2'-bipyridine (bpy) or 4,4'-diethylester-2,2'-bipyridine (deeb) were synthesized and fully characterized using an arsenal of diffraction, electrochemical and spectroscopic techniques together with DFT/TD-DFT calculations. All the compounds studied here undergo ultrafast ILET in the picosecond or subpicosecond time scale, irrespective of the driving force or directionality of ILET, showing a typical Kasha behavior that dissipates energy before any potential bimolecular reactivity. This precludes the utilization of high-energy excited states, involving a non-LUMO excited electron, in solar-energy conversion strategies requiring diffusion-controlled reactivity.

Source: Inorganic Chemistry

DOI: 10.1021/acs.inorgchem.5c03575

Authors: Pedro O. Abate, Agustina Cotic, Daiana Cabrosi, Luis M. Baraldo, Alejandro Cadranel

Institutions: Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Instituto de Química-Física de los Materiales, Medio Ambiente y Energía, Friedrich-Alexander-Universität Erlangen-Nürnberg

Language: English

Topic: Photochemistry and Electron Transfer Studies

Subfield: Physical and Theoretical Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: green

Funders: Consejo Nacional de Investigaciones Científicas y Técnicas, Agencia Nacional de Promoción Científica y Tecnológica

Awards: G183426966, G2279125466, G3738084356, G5107567825