Dye-sensitized photocatalytic H₂ generation has been investigated using a metal-free phenothiazine-based donor–acceptor sensitizer (PTZ-GLU) in combination with coadsorbents. The coadsorption of the PTZ-GLU dye, functionalized with a glucose end-group, in combination with a glucose-based coadsorbent, afforded improved photocatalytic activity compared to the absence of coadsorbents, to the use of a conventional (chenodeoxycholic acid) coadsorbent, or by replacing the dye glucose functionality with an alkyl chain. The results suggest the strategic role of directional intermolecular dye–coadsorbent interactions on the semiconductor surface, as confirmed by first principles computational modeling, which likely suppressed detrimental recombination processes.

中文翻译：

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染料敏化的光催化氢生成：通过有机光敏剂-共吸附分子间相互作用提高效率

已使用无金属吩噻嗪基供体-受体敏化剂（PTZ-GLU）结合助吸附剂研究了染料敏化的光催化H ₂生成。与不使用助吸附剂相比，使用葡萄糖端基官能化的PTZ-GLU染料与不使用助吸附剂的共吸附，与使用常规（鹅去氧胆酸）共吸附剂相比，具有更高的光催化活性，或者通过用烷基链取代染料葡萄糖官能团。结果表明，第一原理计算模型证实了定向分子间染料-共吸附剂在半导体表面上的战略作用，这很可能抑制了有害的重组过程。