Theoretical Study of Ultrafast Electron Dynamics in Amino Acids

29th International Conference on Photonic, Electronic, and Atomic Collisions

Ayuso, D.^1 ; Palacios, A.^1 ; Decleva, P.^2 ; Martín, F.^1,3

Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, Cantoblanco Madrid

28049, Spain^1

Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste and CNR-Istituto Officina Dei Materiali, Trieste

34127, Italy^2

Instituto Madrileño de Estudios Avanzados en Nanociencia, Cantoblanco, Madrid

28049, Spain^3

关键词: Amino acid phenylalanine;    Biological molecule;    Charge fluctuations;    Charged fragments;    Molecular skeleton;    Pump-probe experiments;    Theoretical study;    Ultrafast electron dynamics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/11/112129/pdf
DOI  :  10.1088/1742-6596/635/11/112129

来源: IOP

【 摘 要 】

Prompt ionization of large biological molecules may induce ultrafast charge migration along the molecular skeleton, preceding any nuclear rearrangement. This phenomenon has been recently observed in the amino acid phenylalanine in a two-color pump probe experiment, where the production of ionic fragments was measured as a function of the time delay between the two pulses and charge fluctuations manifested as sub-4.5 fs oscillations in the quantum yield of a specific doubly charged fragment. We present our latest results in glycine, and compare with previous findings in phenylalanine. We seek to perform a systematic study including larger aminoacids such as tryptophan.