Model for triplet-triplet energy transfer in natural clusters of peridinin molecules contained in dinoflagellate's outer antenna proteins

Article Abstract:

Research was conducted to examine the triplet-triplet energy transfer among peridinin molecules in peridinin-chlorophyll-protein (PCP) complexes from two different dinoflagellate species using the optically detected magnetic resonance method combined with triplet-state decay rate measurements. Results demonstrate that Heterocapsa pygmeae-PCP also behaves in solution as a dimeric protein molecule stabilized by noncovalent interactions with an overall structure very similar to that of the larger covalent dimer.

Molecules, Energy transfer, Plant proteins, Dinoflagellates

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Fluorescence and absorption detected magnetic resonance of chlorosomes from green bacteria Chlorobium tepidum and Chloroflexus aurantiacus. A comparative study

Article Abstract:

A comparative study of the isolated cholorsomes from green bacteria Chlorobium tepidum and Chloroflexus aurantiacus is performed by optically detected magnetic resonance (ODMR) technique. The functional interactions among pigments, analogies and differences between the light harvesting systems of the two species are reported based on fluorescence and absorption spectral analysis.

Chemistry, Physical and theoretical, Physical chemistry, Bacteria, Photosynthetic, Photosynthetic bacteria, Magnetic resonance

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Photoinduced long-lived charge separation in a tetrathiafulvalene-porphyrin-fullerene triad detected by time-resolved electron paramagnetic resonance

Article Abstract:

Photoinduced electron transfer in TTF-P-C60 (whereTTF=tetrathiafulvalene ) in triad to form a long-lived charge-separated state TTF(super .+)-P-C(super .-) is investigated. It is found that in the nematic phase of E-7 at ambient temperatures, high degree of ordering in the liquid crystal is achieved by the molecular triad.

Arizona, Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Porphyrins, Electron transport, Electron paramagnetic resonance

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