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Gelation-Assisted Light Harvesting by Selective Energy Transfer from an Oligo(p-phenylenevinylene)-Based Self-Assembly to an Organic Dye

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  • This work was supported by the Department of Science and Technology, Government of India under the Swarnajayanti scheme (DST/SF/C6/99-2000). We thank Mr. P. Prabhakar Rao for SEM analysis and CSIR for a research fellowship to S.J.G. This is contribution number RRLT-PRU-155.

Abstract

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Hot gels get turned off: Gelation of the title molecules facilitate transfer of excitation energy exclusively from the self-assembled nanostructures (see scheme path a) to Rhodamine B and not from the single molecules (path b), thereby establishing the role of self-assembled gel nanostructures in light harvesting. The emission from the dye can be shut off in a thermoreversible fashion since the self-assembly breaks to form molecular, dissolved oligo(phenylenevinylene)s above the gel melting temperature (Tgel).

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