Exciton-wave packet dynamics in molecular aggregates studied with pump-probe spectroscopy
Article Abstract:
A new study uses the doorway-window representation of sequential pump-probe spectroscopy to investigate excitation dynamics in molecular aggregates. Results for a five-chromophore model aggregate are presented.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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Bacteriochlorophyll and Carotenoid Excitonic Couplings in the LH2 System of Purple Bacteria
Article Abstract:
An effective Frenkel-exciton Hamiltonian for the entire LH2 photosynthetic complex (B800, B850, and carotenoids) from Rhodospirillum molischianum is calculated by combining the crystal structure with the Collective Electronic Oscillators (CEO) algorithm for optical response. The Forster incoherent energy transfer rates among the weakly coupled B800-B900, B800-B850, Lyc-B850, and Lyc-B850 molecules are calculated, and the effects of the dielectric medium on the LH2 light-harvesting function are investigated.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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Localized electronic excitations in phenylacetylene dendrimers
Article Abstract:
Collective electronic normal modes representing the changes in charge and bond-order distributions induced by the optical field were employed in a study of the absorption spectra of two families of dendrimers composed of a phenylacetylene repeat unit in a self-similar fashion around the core. This collective electronic oscillator approach demonstrated that the electron-hole pairs that contribute to the elementary optical collective excitations are well-localized within segments connected by benzene rings substituted at the meta-position.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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