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A ferrocenecarboxylate-functionalized titanium-oxo-cluster: the ferrocene wheel as a sensitizer for photocurrent response
Dalton Transactions ( IF 3.5 ) Pub Date : 2017-05-29 00:00:00 , DOI: 10.1039/c7dt01756a
Yang Fan 1, 2, 3, 4, 5 , Ying Cui 1, 2, 3, 4, 5 , Guo-Dong Zou 1, 2, 3, 4, 5 , Rui-Huan Duan 5, 6, 7, 8 , Xu Zhang 5, 6, 7, 8 , Yu-Xiang Dong 1, 2, 3, 4, 5 , Hai-Ting Lv 1, 2, 3, 4, 5 , Jun-Tao Cao 1, 2, 3, 4, 5 , Qiang-Shan Jing 1, 2, 3, 4, 5
Affiliation  

Sensitized titanium-oxo clusters (TOCs) have attracted growing interest. However, reports on TOCs incorporated with a metal complex as photosensitizers are still very rare. In the present work, the organometallic complex ferrocene was used as a sensitizer for a titanium-oxo cluster. A ferrocenecarboxylate-substituted titanium-oxo cluster [Ti63-O)6(OiPr)6(O2CFc)6] (Fc = ferrocenyl) was synthesized and structurally characterized, in which the ferrocene wheel performs as a sensitizer for photocurrent response. For comparison, naphthalene-sensitized titanium-oxo clusters [Ti63-O)6(OiPr)6(NA)6] (NA = 1-naphthoate) and [Ti63-O)6(OiPr)6(NAA)6] (NAA = 1-naphthylacetate) with the same {Ti6} core structure were also synthesized. The structures, optical behaviors, electronic states and photoelectrochemical properties of these sensitized {Ti6} clusters were investigated. It is demonstrated that the introduction of ferrocene groups into the titanium-oxo cluster significantly reduces the band gap and enhances the photocurrent response in comparison with the naphthalene-sensitized clusters. The substantially reduced band gap of the ferrocene-sensitized cluster was attributed to the introduction of Fe(II) d–d transitions and the possible contribution from the Fc → {Ti6} charge transfer. For the naphthalene-sensitized clusters, the better electronic coupling between the dye and the {Ti6} core in the 1-naphthoate (NA) substituted cluster results in higher photoelectrochemical activity.

中文翻译:

二茂铁羧酸盐官能化的钛-氧簇:二茂铁轮作为光电流响应的敏化剂

敏化的钛-氧簇(TOC)引起了越来越多的兴趣。但是,关于将TOC与金属配合物用作光敏剂的报道仍然很少。在目前的工作中,有机金属络合物二茂铁被用作钛-氧代簇的敏化剂。甲ferrocenecarboxylate取代的钛-氧簇钛[Ti 6(μ 3 -O)6(OiPr)6(O 2 CFC)6 ](FC =二茂铁)合成和结构特征,其中,所述二茂铁车轮执行作为敏化剂光电流响应。为了进行比较,萘敏化钛-氧簇钛[Ti 6(μ 3 -O)6(OiPr)6(NA)6 ](NA = 1萘甲酸盐)和钛[Ti 6(μ 3 -O)6(OiPr)6(NAA)6 ](NAA = 1-萘乙酸)具有相同的Ti { 6 }核心结构也合成的。研究了这些敏化的{Ti 6 }团簇的结构,光学行为,电子态和光电化学性质。已经证明,与萘敏化的簇相比,将二茂铁基团引入钛-氧代簇中显着减小了带隙并且增强了光电流响应。二茂铁敏化团簇的带隙显着减少是由于Fe(II)d–d跃迁以及Fc→{Ti 6 }电荷转移的可能贡献。对于萘敏化的簇,染料与1-萘甲酸(NA)取代簇中的{Ti 6 }核之间较好的电子偶联导致更高的光电化学活性。
更新日期:2017-06-13
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