Photochemical Reactivity of Trifluoromethyl Aromatic Amines: The Example of 3,5‐diamino‐trifluoromethyl‐benzene (3,5‐DABTF)
作者:Philippe Chaignon、Sylvie Cortial、Vincent Guerineau、Marie‐Thérèse Adeline、Charles Giannotti、Gérard Fan、Jamal Ouazzani
DOI:10.1562/2005-08-03-ra-637
日期:2005.11
This work presents the application of an on-line photoreactor to the detection of 3,5-diamino-trifluoromethyl-benzene (3,5-DABTF) in aqueous solutions. When irradiated at 310 nm, this compound is defluorinated to 3,5-diaminobenzoic acid by a nucleophilic substitution of the fluoride by water. Concomitantly, defluorination intermediates polymerize through amide bonds to give dark-colored compounds.
这项工作介绍了在线光反应器在水溶液中3,5-二氨基-三氟甲基苯(3,5-DABTF)的检测中的应用。当在310 nm处照射时,该化合物通过水对氟化物的亲核取代而脱氟为3,5-二氨基苯甲酸。伴随地,脱氟中间体通过酰胺键聚合而得到深色化合物。我们利用光催化的脱氟作用和随后降低的pH值来开发出原始的和特定的光反应器。通过双电极连续记录反应器出口的pH和温度,为我们提供了优化系统的机会。在光反应器中,3,5-DABTF立即且完全转化,这是由流动溶液pH从6.2迅速下降到3证明的。2和流出溶液的色谱分析。该检测在百万分之1到1000的范围内仍然有效。