Ultrafast Excited-State Intramolecular Proton Transfer of Aloesaponarin I

Time-resolved emission of aloesaponarin I was studied with the fluorescence up-conversion and time-correlated single-photon-counting techniques. The rates of the excited-state intramolecular proton transfer, of the solvent and molecular rearrangements, and of the decay from the excited proton-transf...

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Bibliographic Details
Published inThe journal of physical chemistry. B Vol. 117; no. 16; pp. 4347 - 4353
Main Authors Nagaoka, Shin-ichi, Uno, Hidemitsu, Huppert, Dan
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 25.04.2013
Subjects
Aloe
Anthraquinones - chemistry
Biological and medical sciences
Density
Deuterium - chemistry
Excitation
Fundamental and applied biological sciences. Psychology
Hydrogen Bonding
In solution. Condensed state. Thin layers
Kinetics
Mathematical analysis
Molecular biophysics
Physical chemistry
Physico-chemical properties of biomolecules
Protons
Quenching
Singlet Oxygen - chemistry
Solvents
Solvents - chemistry
Ultraviolet Rays
Upconversion
Proton transfer
Fluorescence
Frequency conversion
Singlet state
Saponaria
Time resolved spectra
Caryophyllaceae
Time dependence
Ultraviolet radiation
Dicotyledones
Angiospermae
Density functional method
Spermatophyta
Aloe
Intramolecular interaction
Excited state
Ultrafast process
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Summary:Time-resolved emission of aloesaponarin I was studied with the fluorescence up-conversion and time-correlated single-photon-counting techniques. The rates of the excited-state intramolecular proton transfer, of the solvent and molecular rearrangements, and of the decay from the excited proton-transferred species were determined and interpreted in the light of time-dependent density functional calculations. These results were discussed in conjunction with UV protection and singlet-oxygen quenching activity of aloe.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1520-6106
1520-5207
DOI:10.1021/jp306870y