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New Chlorophyll Findings Has Been Reported by Investigators at Jadavpur University

May 27, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators publish new report on Biological Factors. According to news reporting originating from Kolkata, India, by NewsRx correspondents, research stated, "The intermolecular excitonic migration in highly packed environment of light harvesting complex can be regulated by different peptide binding during photosynthesis. Porphyrin based conducting polymer nanostructures might be expected to exhibit similar behavior by introducing disorder through different interactions, thereby facilitating control over excitonic delocalization."

Our news editors obtained a quote from the research from Jadavpur University, "Polypyrrole synthesized in the presence of two different chlorophyll a (CHL-a) species [spherical and cylindrical micelles] not only gives rise to two different nanostructures that are spherical and rod shaped (1D), evident from FESEM, but also differ in excitonic interactions, which is evident from fluorescence, UV-vis, and TCSPC experiments. The excitonic delocalization length and dipole-dipole coupling strength are higher in spherical species coupled with strong macrocyclic coordination resulting in enhanced superradiance. The ratio of radiative and nonradiative decay rate is higher in ID nanostructure, implying that exciton decay rate through nonradiative pathways decreases in this nanohybrid in comparison with spherical counterpart. These facts also corroborate with the greater anisotropy data. The fast and slow anisotropic decay profile of 1D chlorophyll a/polypyrrole (CHL-a/PPY) nanostructure is significantly slower than that of its spherical counterpart [fitted with wobbling and cone model]. The greater value of order parameter in nanosphere, indicating highly oriented distribution, also supports the increased coherence length."

According to the news editors, the research concluded: "These findings suggest that the nanohybrids are promising candidates in solar energy conversion schemes."

For more information on this research see: Confined Motion, Excitonic Migration, and Superradiance of Ordered Chlorophyll a Assembly Packed in Two Different Polypyrrole Nanostructures. Journal of Physical Chemistry C, 2014;118(13):6558-6564. Journal of Physical Chemistry C can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Journal of Physical Chemistry C -

The news editors report that additional information may be obtained by contacting J.S. Manna, Jadavpur University, Dept. of Met & Mat Engn, Kolkata 700032, India. Additional authors for this research include D. Das and M.K. Mitra (see also Biological Factors).

Keywords for this news article include: Asia, India, Kolkata, Nanostructural, Nanostructures, Nanotechnology, Chlorophyllides, Metalloporphyrins, Biological Factors, Emerging Technologies

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Source: Life Science Weekly

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