In 2022,Inomata, Tomohiko; Matsunaga, Ayaka; Jin, Guangzhu; Kitagawa, Takuma; Muramatsu, Mizuho; Ozawa, Tomohiro; Masuda, Hideki published an article in RSC Advances. The title of the article was 《Improvements in photoelectric performance of dye-sensitised solar cells using ionic liquid-modified TiO2 electrodes》.Reference of 4-Bromobutanoic acid The author mentioned the following in the article:
One of the major problems in dye-sensitized solar cells (DSSCs) is the aggregation of dyes on TiO2 electrodes, which leads to undesirable electron transfer. Various anti-aggregation agents, such as deoxycholic acid, have been proposed and applied to prevent dye aggregation on the electrodes. In this study, we designed and synthesized a phosphonium-type ionic liquid that can be modified on the TiO2 electrode surface and used as a new anti-aggregation agent. Although the modification of the ionic liquid onto the electrode reduced the amount of dye adsorbed on the electrode, it showed a significant anti-aggregation effect, thereby improving the photovoltaic performance of DSSCs with N3 and J13 dyes. This finding suggests that ionic liquids are effective as anti-aggregation agents for DSSCs. The experimental part of the paper was very detailed, including the reaction process of 4-Bromobutanoic acid(cas: 2623-87-2Reference of 4-Bromobutanoic acid)
4-Bromobutanoic acid(cas: 2623-87-2) belongs to carboxylic acids. The chief chemical characteristic of the carboxylic acids is their acidity. They are generally more acidic than other organic compounds containing hydroxyl groups but are generally weaker than the familiar mineral acids (e.g., hydrochloric acid, HCl, sulfuric acid, H2SO4, etc.).Reference of 4-Bromobutanoic acid
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary