Heterosupramolecular chemistry: long-lived light-induced charge separation by vectorial electron flow in a heterotriad

Xavier Marguerettaz; S. Nagaraja Rao; Gareth Redmond; Donald Fitzmaurice

doi:10.1117/12.185433

9 September 1994 Heterosupramolecular chemistry: long-lived light-induced charge separation by vectorial electron flow in a heterotriad

Xavier Marguerettaz, S. Nagaraja Rao, Gareth Redmond, Donald Fitzmaurice

Author Affiliations +

Proceedings Volume 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII; (1994) https://doi.org/10.1117/12.185433
Event: Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, 1994, Freiburg, Germany

Abstract

A redox molecule (acceptor) is attached, using a surface chelate (spacer), to a semiconductor electrode (donor). Such donor-spacer-acceptor complexes, referred to as heterodyads, offer the prospect of testing important aspects of the theory of heterogeneous electron transfer (ET) at the semiconductor electrode-liquid electrolyte interface (SLI). Specifically, potentiostatically controlled ET from the conduction band of the semiconductor electrode to a redox species held at a fixed distance and orientation with respect to the SLI is possible. Extending the above approach, a modified SLI has been prepared at which potentiostatically controlled vectorial electron flow leading to long-lived charge trapping is possible. Specifically, a spacer-acceptor I-acceptor II complex is adsorbed at a semiconductor electrode to form a heterotriad. Application of a potential more negative than the potential of the conduction band at the SLI results in acceptor I mediated reduction of acceptor II. The reduced form of acceptor II is stabilized and long-lived charge trapping results. Efficient light induced charge separation by vectorial electron flow at the above modified SLI is also possible.

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Xavier Marguerettaz, S. Nagaraja Rao, Gareth Redmond, and Donald Fitzmaurice "Heterosupramolecular chemistry: long-lived light-induced charge separation by vectorial electron flow in a heterotriad", Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); https://doi.org/10.1117/12.185433

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