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• W3129989260 abstract "The influence of hydrogen bonds (H-bonds) in the structure, dynamics, and functionality of biological and artificial complex systems is the subject of intense investigation. In this broad context, particular attention has recently been focused on the ultrafast H-bond dependent dynamical properties in the electronic excited state because of their potentially dramatic consequences on the mechanism, dynamics, and efficiency of photochemical reactions and photophysical processes of crucial importance for life and technology. Excited-state H-bond dynamics generally occur on ultrafast time scales of hundreds of femtoseconds or less, making the characterization of associated mechanisms particularly challenging with conventional time-resolved techniques. Here, 2D electronic spectroscopy is exploited to shed light on this still largely unexplored dynamic mechanism. An H-bonded molecular dimer prepared by self-assembly of two boron-dipyrromethene dyes has been specifically designed and synthesized for this aim. The obtained results confirm that upon formation of H-bonds and the dimer, a new ultrafast relaxation channel is activated in the ultrafast dynamics, mediated by the vibrational motions of the hydrogen donor and acceptor groups. This relaxation channel also involves, beyond intra-molecular relaxations, an inter-molecular transfer process. This is particularly significant considering the long distance between the centers of mass of the two molecules. These findings suggest that the design of H-bonded structures is a particularly powerful tool to drive the ultrafast dynamics in complex materials." @default.
• W3129989260 created "2021-03-01" @default.
• W3129989260 creator A5018268332 @default.
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• W3129989260 date "2021-02-23" @default.
• W3129989260 modified "2023-10-15" @default.
• W3129989260 title "The effect of hydrogen bonds on the ultrafast relaxation dynamics of a BODIPY dimer" @default.
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• W3129989260 doi "https://doi.org/10.1063/5.0038242" @default.
• W3129989260 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33639732" @default.
• W3129989260 hasPublicationYear "2021" @default.
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