Pulsed EPR and DFT characterization of radicals produced by photo-oxidation of zeaxanthin and violaxanthin on silica-alumina
Article Abstract:
Pulsed electron nuclear double resonance (ENDOR) and two-dimensional (2D)-hyperfine sublevel correlation spectroscopy (HYSCORE) are used for characterizing carotenoid radicals of zeaxanthin and violaxanthin photogenerated on silica-alumina. The formation of neutral radical of zeaxanthin has provided an effective nonphotochemical quencher of the excited state of chlorophyll for photoreaction in the presence of excess light.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2008
User Contributions:
Comment about this article or add new information about this topic:
Detection of anisotropic hyperfine components of chemically prepared carotenoid radical cations: 1D and 2D ESEEM and pulsed ENDOR study
Article Abstract:
Canthaxanthin and 8' -apo-beta-caroten-8' -al radical cations chemically prepared on activated silica-alumina and in CH2Cl2 solution containing AlCl3 are studied by pulsed EPR and electron nuclear double resonance (ENDOR).
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
Isomerization of carotenoids in the presence of MCM-41 molecular sieves: EPR and HPLC studies
Article Abstract:
High isomerization efficiency of Car embedded in MCM-41 can be obtained by oxidation or photoexcitation. The study gives an insight into the isomerization behavior of carotenoids in photosystem II.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Preparation and in-situ spectroscopic characterization of molecularly dispersed titanium oxide on silica. A comparison of ultraviolet and visible Raman spectra of supported metal oxide catalysts
- Abstracts: Electrochemical characterization of nickel deposition on aromatic dithiol monolayers on gold electrodes. Photophysical behavior of variously sized colloidal gold clusters capped with monolayers of an alkylstilbenethiolate
- Abstracts: The use of impedance spectroscopy for the characterization of protein-modified ISFET devices: application of the method for the analysis of biorecognition processes
- Abstracts: Characterization of fractions from repeated functionalization reactions of carbon nanotubes. Ultrafast spectroscopy of the protonated Schiff bases of free and C(sub 13) double bond C(sub 14) locked retinals
- Abstracts: Delamination of Ti-MWW and high efficiency in epoxidation of alkenes with various molecular sizes. The three-dimensional structure of the titanium-centered active site during steady-state catalytic epoxidation of alkenes