Chlorogenic acids protect organic dyes against self-catalyzed photobleaching was written by Tsuchida, Kino;Okumura, Hisako;Ikarashi, Taro;Takahashi, Yukiko. And the article was included in Journal of Photochemistry and Photobiology, A: Chemistry in 2022.SDS of cas: 61-73-4 This article mentions the following:
An environmentally benign method for preventing the photofading of organic dyes was developed using chlorogenic acids, also known as caffeoylquinic acids (CQAs), which can be obtained in large quantities from agricultural wastes. In this study, 5-caffeoylquinic acid (5-CQA) and 4,5-dicaffeolyquinic acid (4,5-diCQA) were used as singlet oxygen (1O2) quenchers, and their suppression mechanisms were evaluated by the self-catalyzed photobleaching reactions of methylene blue (MB) and rose bengal (RB) in aqueous solutions at different pH values. Light irradiation experiments, half-wave oxidation potentials measurements, LC-MS, and NMR demonstrated that CQAs effectively inhibited the photofading of the dyes in the pH range of 4-9 with two independent reaction mechanisms. 4,5-diCQA was more effective in preventing the photofading than 5-CQA. The kinetic anal. estimated the 1O2 quenching constants of CQAs (kq = 7.22 x 107 M-1 s-1 and 9.33 x 107 M-1 s-1 for 5-CQA and 4,5-diCQA) and the bimol. rate constant for the chem. quenching of 1O2 by MB (kf = 2.88 x 104 M-1 s-1). Comparing these rate constants revealed that the quenching reactions of 1O2 by CQAs were more predominantly than the photofading reaction of MB. In the experiment, the researchers used many compounds, for example, 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride (cas: 61-73-4SDS of cas: 61-73-4).
3,7-Bis(dimethylamino)phenothiazin-5-ium chloride (cas: 61-73-4) belongs to organic chlorides. An organic chloride is an organic compound containing at least one covalently bonded atom of chlorine. Their wide structural variety and divergent chemical properties lead to a broad range of names and applications. The haloform reaction, using chlorine and sodium hydroxide, is also able to generate alkyl halides from methyl ketones, and related compounds. Chloroform was formerly produced thus.SDS of cas: 61-73-4
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics