期刊
CHEMICAL SCIENCE
卷 9, 期 25, 页码 5578-5584出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8sc00862k
关键词
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资金
- EPSRC [EPJ5002881, CM1202]
- Newcastle University [EPJ5002881, CM1202]
- EPSRC [EP/R021503/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/R021503/1] Funding Source: researchfish
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 tau = 54 ps to generate a long-lived (tau = 4.8 ns) charge-separated (CS) state, making this system appropriate for applications in photoelectrochemical devices.
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