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Issue 5, 2014
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Light harvesting vesicular donor–acceptor scaffold limits the rate of charge recombination in the presence of an electron donor

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Abstract

We report the synthesis and excited state properties of a single component light harvesting donor–acceptor dyad (R/S)-NP(OH)2 containing an α,β-dihydroxypropyl side-chain that can undergo molecule–bilayer–vesicle–gel–crystal transition. By virtue of steric hindrance offered by orthogonal naphthalimide and 2,6-diisopropylphenyl substituents, very weak H-type excitonic interactions between the perylenimide units resulted in high fluorescence quantum yield in the dyad-based metastable vesicular gel having a near-quantitative excitation energy transfer from naphthalimide to perylenimide. Femtosecond transient absorption measurements of the dyad (R/S)-NP(OH)2 : indole co-gel show that the vesicular scaffold promoted extension of the survival time of charge separated states (∼1.4 ns) when compared to ultrafast charge recombination (∼6 ps) in dyad (R/S)-NP(OH)2 : indole solution.

Graphical abstract: Light harvesting vesicular donor–acceptor scaffold limits the rate of charge recombination in the presence of an electron donor

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The article was received on 03 Oct 2013, accepted on 28 Nov 2013 and first published on 29 Nov 2013


Article type: Paper
DOI: 10.1039/C3EE43293A
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Energy Environ. Sci., 2014,7, 1661-1669

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    Light harvesting vesicular donor–acceptor scaffold limits the rate of charge recombination in the presence of an electron donor

    R. T. Cheriya, A. R. Mallia and M. Hariharan, Energy Environ. Sci., 2014, 7, 1661
    DOI: 10.1039/C3EE43293A

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