Excitonic interactions and stark spectroscopy of light harvesting systems
Article Abstract:
A new Green function expression for the Stark signal of molecular aggregates from the third-order nonlinear response to the total field has been derived. The new formulation does not suffer from singularities when the exciton states are nearly degenerate and avoids the computation of two-exciton states. The Stark spectrum is expressed as the sum of Type I and II contributions. The former has the shape of the first and second derivative of the line shape function. The latter depend on transitions within the one-exciton band.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Superradiance coherence sizes in single-molecule spectroscopy of LH2 antenna complexes
Article Abstract:
A study was conducted to analyze the distribution of radiative lifetimes resulting from a static disorder mechanism for exciton localization. The distributions of radiative decay rates in circular aggregates for two extreme dipole orientations of chromophores were examined. Results provide detailed characterizations of the electronic state properties. Findings also showed that the lower-energy excitations are the exciton type with delocalization over the entire aggregate.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Superradiance of aggregated thiacarbocyanine molecules
Article Abstract:
Steady-state fluorescence and time-resolve fluorescence lifetime measurements have been undertaken for 3,3'-diethyl-5,5'-dichloro-9-phenylthiacarbocyanine in methanol and in aqueous homogenous solution. Superradiance plays a vital role in optical dynamics of the aggregated system.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Probing paeonol-Puronic polymer interactions by [super 1]H NMR spectroscopy. Effect of ionic liquids on the aggregation behavior of PEO-PPO-PEO block copolymers in aqueous solution
- Abstracts: Study on nonlinear spectroscopy of tetraphenylporphyrin and dithiaporphyrin diacids. Fast excition migration in phorphyrin-functionalized polypeptides
- Abstracts: Diffusion of probe particles in surfactant gels: dynamic light scattering study. Ionic and Zwitterionic model macromolecular surfactants
- Abstracts: Identification of precursor species in the formation of MFI zeolite in the TPAOH-TEOS-H20 system. Physiochemical characterization of silicalite-1 nanophase material
- Abstracts: Fluorescence and triplet quantum yields of arenes on surfaces. Reactions of pyrene excited states with oxygen on the surface of porous silica gel and similar surfaces