Ruthenium complexes of 2-(2′-pyridyl)benzimidazole as photosensitizers for dye-sensitized solar cellsElectronic supplementary information (ESI) available: details of the luminescence measurements and solar cell construction and testing; synthesis details; 1H–1H COSY and NOESY 2D spectra for [(bpy)2Ru(pbimH)](PF6)2. See http://www.rsc.org/suppdata/dt/b2/b208289f/
作者:Hunan Yi、Joe A. Crayston、John T. S. Irvine
DOI:10.1039/b208289f
日期:2003.2.11
N-Alkylated carboxylic acid derivatives of 2-(2′-pyridyl)benzimidazole (pbimH) with different chain-lengths (pbim(CH)nCO2H where n = 1–3) and their ruthenium complexes [Ru(bpy)2(pbim)](PF6)2 have been synthesized and characterized. 2D COSY and NOESY NMR spectroscopy were used to aid the assignment of the pbim NMR spectrum. The effect of chain-length on the cyclic voltammetry (CV) was studied and the
具有不同链长(pbim(CH)n CO 2 H,n = 1-3)的2-(2'-吡啶基)苯并咪唑(pbimH)的N-烷基羧酸衍生物及其钌配合物[Ru(bpy)2(pbim)](PF 6)2已被合成和表征。2D COZY和NOESY NMR光谱用于辅助pbim NMR光谱的分配。研究了链长对循环伏安法(CV)的影响,并重新研究了母体pbimH复合物的伏安法。通过观察对称的,表面受限的Ru III / II,证实了羧酸基团与涂覆TiO 2的电极结合的能力反射率IR显示在1620 cm -1处有一个带,这是由于键合的羧酸根(COO bandTi)基团引起的。由于敏化剂与表面之间的距离以及电荷分离的激发态与表面的低效耦合,使用这些敏化剂的太阳能电池的效率相当低。单元长度的电池开路电压下降反映了这种距离效应。时间分辨发光光谱表明发生了向TiO 2导带的快速电子注入(<30 ns),但这还不够快,无法有效地与其他激发态过程竞争。