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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis, structure and properties of [Pt(2,2'-bipyridyl-5,5'-dicarboxylic acid)(3,4-toluenedithiolate)]: tuning molecular properties for application in dye-sensitised solar cells
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Synthesis, structure and properties of [Pt(2,2'-bipyridyl-5,5'-dicarboxylic acid)(3,4-toluenedithiolate)]: tuning molecular properties for application in dye-sensitised solar cells

机译：[Pt（2,2'-联吡啶-5,5'-二羧酸）（3,4-甲苯二硫代甲酸酯）]的合成，结构和性质：调节分子性质，用于染料敏化太阳能电池

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The platinum diimine dithiolate complex, [Pt(2,2'-bipyridyl-5,5'-dicarboxylicacid)(3,4-toluenedithiolate)]([Pt(5,5'-dcbpy)(tdt)]) and its tetrabutylammonium salt [TBA]_2[Pt(5,5'-dcbpy)(tdt)] have been prepared, spectroscopically and electrochemically characterised and attached on to TiO_2 substrate to be used as solar cell sensitisers. A single-crystal X-ray structure was obtained for [TBA]_2[Pt(5,5'-dcbpy)(tdt)]·EtOH·EtOAc. The effect of the position of the two carboxylic acid substituents on the electrochemistry of the 5,5'-disubstituted complexes is discussed in comparison with the previously reported [Pt(4,4'-dcbpy)(tdt)]. Electrochemical studies show no major change in the HOMO after movement of the carboxylic acid groups, consistent with assignment of the HOMO as largely dithiolate based. Movement of the carboxylic acid groups, consistent with assignment of the HOMO as largely dithiolate based. Movement of the carboxylic acid groups makes the diimine electronic character and hence the LUMO of the complexes different. Electrochemical studies show a change to lower energy of the LUMO represented by changes in reduction potential of the compound on moving the carboxylic acid substituents from the 4,4' to the 5,5' positions. Both [Pt(5,5'-dcbpy)(tdt)] and [TBA]_2[Pt(5,5'-dcbpy)(tdt)] have been used as solar cell sensitisers, with the di-TBA salt giving lower dye loading but superior photovoltaic performance. The consequences of tuning the complex through the position of the carboxylic acid groups are discussed.
机译：铂二亚胺二硫醇盐络合物[[Pt（2,2'-联吡啶-5,5'-二羧酸）（3,4-甲苯二硫醇盐）]（[Pt（5,5'-dcbpy）（tdt）]）及其四丁基铵制备了盐[TBA] _2 [Pt（5,5'-dcbpy）（tdt）]，对其进行了光谱和电化学表征，并将其附着在TiO_2衬底上用作太阳能电池敏化剂。得到[TBA] _2 [Pt（5,5'-dcbpy）（tdt）]·EtOH·EtOAc的单晶X射线结构。与先前报道的[Pt（4,4'-dcbpy）（tdt）]相比较，讨论了两个羧酸取代基的位置对5,5'-二取代配合物的电化学的影响。电化学研究表明，在羧酸基团移动后，HOMO没有重大变化，这与将HOMO指定为主要基于二硫醇盐的情况相一致。羧酸基团的移动，与HOMO的分配基本为二硫醇基一致。羧酸基团的移动使得二亚胺的电子特性和因此配合物的LUMO不同。电化学研究表明，当羧酸取代基从4,4'移至5,5'位置时，化合物还原电位的变化代表了LUMO能量的降低。 [Pt（5,5'-dcbpy）（tdt）]和[TBA] _2 [Pt（5,5'-dcbpy）（tdt）]均已用作太阳能电池敏化剂，而di-TBA盐的含量较低染料负载量大，但具有优异的光伏性能。讨论了通过羧酸基团的位置调节配合物的结果。

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