Can new fluorescence dyes for photodynamic therapy be a solar-cell device?

本研究合成了新型ABPX衍生物，它们具有长的烷基链以阻止染料-染料分子间的相互作用，并研究了它们的物理化学性质，以应用于染料敏化太阳能电池的光敏剂。随着烷基链的增长，其吸收光谱和荧光发射光谱都有轻微的红移。在氯仿、丙酮、甲醇和乙腈等溶剂中，ABPX 05的顺式和反式结构的phi值分别为0.28和0.28，是ABPX 01的顺式和反式结构的phi值的2倍。ABPX中的烷基链越长，观察到的phi越大。从这些结果中，我们估计，具有长烷基链的ABPX衍生物的phi的改善来自于防止染料-染料分子间相互作用。

In this research, we have synthesized new ABPX derivatives, which have long alkyl chains to prevent the dye-dye intermolecular interaction, and investigated the photophysical properties of them to apply for a photosensitizer of the dye-sensitized solar cell. As the alkyl chains were longer, the absorption and fluorescence emission spectra were slightly red shifted. The phi of ABPX05 with tetra-octyl chains (cis-form: phi = 0.28, trans-form: phi = 0.28) was twice as high as ABPX01 with tetraethyl (cis-form: phi = 0.16, trans-form: phi = 0.15) in all solvent such as chloroform, acetone methanol and acetonitrile. The longer alkyl chains in ABPX, the larger phi observed. From these results, we estimated the improvement of phi of ABPX derivatives, which have long alkyl chains, were derived from the prevention of dye-dye intermolecular interaction.