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Rapid photoinduced charge injection into covalent polyoxometalate–bodipy conjugates

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Abstract

Controlled design of photoactive hybrids would provide highly active materials for solar energy conversion and photo(electro) catalysis. We describe the kinetics of photoinduced electron transfer in a series of photoactive hybrids based on Keggin-type polyoxometalates (POMs) covalently grafted to bodipy photosensitizers. We show how the electronic properties and corresponding dynamics of these hybrids can be readily tuned by varying the POM metal ion, the anchoring functionalization and the spacer length. Ultrafast visible and IR transient absorption spectroscopy, supported by spectroelectrochemical measurements, reveals that photoinduced electron transfer from the bodipy chromophore to the organosilyl POM derivative occurs as rapidly as τ = 54 ps to generate a long-lived (τ = 4.8 ns) charge-separated (CS) state, making this system appropriate for applications in photoelectrochemical devices.

Graphical abstract: Rapid photoinduced charge injection into covalent polyoxometalate–bodipy conjugates

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Publication details

The article was received on 22 Feb 2018, accepted on 29 May 2018 and first published on 01 Jun 2018


Article type: Edge Article
DOI: 10.1039/C8SC00862K
Citation: Chem. Sci., 2018, Advance Article
  • Open access: Creative Commons BY license
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    Rapid photoinduced charge injection into covalent polyoxometalate–bodipy conjugates

    F. A. Black, A. Jacquart, G. Toupalas, S. Alves, A. Proust, I. P. Clark, E. A. Gibson and G. Izzet, Chem. Sci., 2018, Advance Article , DOI: 10.1039/C8SC00862K

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