茜素
光化学
光致变色
光催化
纳米颗粒
化学
辐照
电子受体
电子转移
氧化还原
分子
茜素红
含时密度泛函理论
材料科学
可见光谱
纳米技术
核化学
无机化学
光电子学
有机化学
催化作用
医学
染色
物理
病理
核物理学
作者
Yesica Di Iorio,Marta A. Brusa,Armin Feldhoff,María A. Grela
出处
期刊:ChemPhysChem
[Wiley]
日期:2009-03-05
卷期号:10 (7): 1077-1083
被引量:15
标识
DOI:10.1002/cphc.200800752
摘要
Reduction of alizarin molecules coupled to TiO(2) nanoparticles (A@TiO(2)) occurs on UV irradiation in the presence of a sacrificial electron donor. Evidence is presented that reduction is mediated by conduction-band electrons and yields a 1,2,9,10-tetrahydroxyanthracene species which remains coupled to the TiO(2) nanoparticles. The spectrum of the reduced complex displays two overlapping broad bands centred at 480 and 650 nm which can harvest visible photons besides 900 nm, in agreement with theoretical predictions by TDDFT. The potential relevance of the dual-redox behaviour of strongly TiO(2) coupled anthraquinone dyes in the field of photocatalysis and in connection with their utilization in the development of dye-sensitized TiO(2) solar cells is briefly discussed.
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