| Summary: | It has been a long-sought scientific target for sustainable chemistry to make effective use of solar energy to drive reactions. Recent research is shining a light on molecular photocatalysts with versatility and tunable properties. Polyoxometalates (POMs) have shown great potential as a result of their appealing photo- and electrochemical properties, as well as their unmatched structural diversity, excellent stability and tunable solubility.
In particular, by removing one or more metal centres, POMs can form lacunary derivatives which can be further modified and functionalized. However, the photo-activity of POMs is normally restricted within the UV range and shows little absorption in the visiblelight region of the spectrum. On the other hand, perylene diimide (PDI) dyes are a class of cheap and stable organic dyes with strong visible light absorption. It is therefore potentially attractive to tune the inherent properties of POMs with this kind of organic chromophore to form visible-light-driven photocatalysts.
This report describes a modular design approach for a new inorganic-organic hybrid POM which studies the optimization the photocatalytic performance of POM under visible light using a photosensitive ligand system. [P2W17O61((P=O)C26H12O7N2P)2] anion was successfully synthesised and characterised via NMR, Mass Spectrometry, CHN elemental analysis, IR, UV-Vis spectrometry, fluorescence emission and electrochemistry. It was determined that the hybrid POM is successfully obtained and there is photo-driven intramolecular charge transfer from the photoactive organic ligand to the inorganic POM core.
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