Sensitization of nanocrystalline TiO2 by Re(I) polypyridyl compounds
Sensitization of nanocrystalline TiO2 by Re(I) polypyridyl compounds
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DOI：
10.1524/zpch.1999.212.part_1.039
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发表时间：
1999-01-01
影响因子：
2.5
通讯作者：
Meyer, GJ
中科院分区：
文献类型：
--
作者：
Hasselmann, GM;Meyer, GJ
合成了[Re（deeb）（CO）（3）（py）]（OTf）和[Re（bpy）（CO）（3）（ina）]（OTf），其中bpy为2，2 '-联吡啶，（deeb）为4，4'-（COOEt）（2）-2，2 '-联吡啶，（py）为吡啶，（ina）为异烟酸，OTf为三氟甲磺酸根阴离子。设计这两种化合物，使得Re（deeb）（CO）（3）（py）（+）通过deeb配体与TiO 2结合，并且Re（bpy）（CO）（3）（ina）（+）通过非发色的ina配体结合。我们发现，吸收的光子电流效率，在实验误差范围内，统一在450 nm的两种化合物。热力学上有利的重组注入电子在二氧化钛与氧化敏化剂需要毫秒完成。
The compounds [Re(deeb)(CO)(3)(py)](OTf) and [Re(bpy)(CO)(3)(ina)](OTf), where bpy is 2,2'-bipyridine, (deeb) is 4,4'-(COOEt)(2)-2,2'-bipyridine, (py) is pyridine, (ina) is isonicotinic acid, and OTf is triflate anion have been prepared, characterized, and anchored to nanocrystalline TiO2. The two compounds were designed such that Re(deeb)(CO)(3)(py)(+) is bound to TiO2 through the deeb ligand and the Re(bpy)(CO)(3)(ina)(+) is bound through a non-chromophoric ina ligand. We find that the absorbed photon-to-current efficiencies are, within experimental error, unity at 450 nm for both compounds. Thermodynamically favorable recombination of the injected electron in TiO2 with the oxidized sensitizer requires milliseconds for completion.