title: Time resolved photoelectron spectroscopy of thioflavin T photoisomerization: a simulation study.
abstract: The excited state isomerization of thioflavin T (ThT) is responsible for the quenching of its fluorescence in a nonrestricted environment. The fluorescence quantum yield increases substantially upon binding to amyloid fibers. Simulations reveal that the variation of the twisting angle between benzothiazole and benzene groups (φ1) is responsible for the subpicosecond fluorescence quenching. The evolution of the twisting process can be directly probed by photoelectron emission with energies ε ≥ 1.0 eV before the molecule reaches the φ1-twisted configuration (~300 fs).
authors.affiliation: Department of Chemistry, University of California, Irvine, California 92617, USA.
authors.forename: Hao
authors.initials: H
authors.lastname: Ren
authors.forename: Benjamin P
authors.initials: BP
authors.lastname: Fingerhut
authors.forename: Shaul
authors.initials: S
authors.lastname: Mukamel
mesh_terms: D052160:Benzothiazoles; D007536:Isomerism; D008958:Models, Molecular; D008968:Molecular Conformation; D055668:Photochemical Processes; D056951:Photoelectron Spectroscopy; D013050:Spectrometry, Fluorescence; D013844:Thiazoles / Q000737:chemistry*; D013997:Time Factors
chemical_list: D052160:Benzothiazoles; D013844:Thiazoles; C009462:thioflavin T