Successful anchoring of cationic dye molecules (thiazole orange, TO) on Pt-TiO2 for a visible-light-harvesting assembly was achieved by surface modification of Pt-TiO2 with 4-sulfocalix[4]arene as a linker, leading to formation of surface complexes (see picture). This heterogeneous system can act as an efficient photocatalyst for production of hydrogen in the presence of a sacrificial reagent (TEOA=triethanolamine).
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Kamegawa et al. (2012) studied this question.
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