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Engineering antiparallel charge-transfer cascades into supramolecular n/p-heterojunction photosystems: toward directional self-sorting on surfaces.

Abstract

This contribution describes recent progress made with the design, synthesis and evaluation of supramolecular architectures for artificial photosynthesis. Emphasis is on the possible introduction of antiparallel redox gradients into the co-axial hole- and electron-transporting channels of supramolecular n/p-heterojunctions, and on directional, uniform axial and alternate lateral self-sorting to get there. Recent results suggest that two-component gradients in both channels are sufficient for photoinduced charge separation over very long distances. Removal of one gradient leads to charge recombination at the usual critical distances, inversion of both gradients causes photocurrent inhibition. These promising results call for user-friendly, cheap and fast approaches to oriented multicomponent architectures on solid surfaces. However, the reduction of efforts devoted to covalent organic synthesis will have to be compensated by the development of strategic concepts on the supramolecular level to tackle basic questions such as self-sorting on surfaces.

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  • Authors

    Lista M, Areephong J, Orentas E, Charbonnaz P, Sakai N, Matile S

    Institution

    Department of Organic Chemistry, University of Geneva, Geneva, Switzerland.

    Source

    Faraday discussions 155: 2012 pg 63-77; discussion 103-14

    MeSH

    Bioelectric Energy Sources
    Biofuels
    Chemical Engineering
    Electron Transport
    Electrons
    Green Chemistry Technology
    Models, Molecular
    Oxidation-Reduction
    Photochemistry
    Photosynthesis
    Solar Energy
    Static Electricity
    Sunlight

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    22470967