溶剂极性和pH对甲苯胺蓝O溶液的影响  

EFFECT OF THE SOLVENT POLARITY AND pH ON TOLUIDINE BLUE O SOLUTION

作　　者：贾海顺[1] 刘爱国[1] 田弋夫 陈文琇[1] 孟昭兴[1] 

机构地区：[1]北京师范大学化学系

出　　处：《北京师范大学学报（自然科学版）》1994年第2期237-240,共4页Journal of Beijing Normal University(Natural Science)

摘　　要：使用分光光度法研究了溶剂极性、温度和ｐＨ对甲苯胺蓝Ｏ（ＴＢＯ）颜色和吸收光谱的影响．实验发现，溶剂极性，染料的聚集作用，不同ｐＨ条件产生的染料分子质子化或ＯＨ加合物可造成染料颜色和λ＿ｍａｘ变化。实验也证明ＴＢＯ在碱性条件下不产生脱甲基产物，所产生的不稳定ＯＨ加合物对苯萃取ＴＢＯ的过程有催化作用，而在此过程中ＯＨ加合物发生离解。使用微扰分子轨道理论及Ｄｅｗａｒ规律讨论了溶剂极性和ＯＨ加合作用对染料分子π电子共轭体系的影响。The effect of solvent polarity, temperature and pH to color and spectrum on toluidine blue O (TBO) solution were investigated by spectrophotometry. The solvent polarity, aggregation of dye, protonation or OH addition at various PH conditions induced changes of color and λmax of dye solution. The experiment exhibited that in alkaline TBO solution could forms unstable TBO-OH adduct, no demethy1 product.TBO-OH adduct was dissociated in the extraction with benzine. The extraction can be catalyzed by OH- ions.The effect of solvent polarity and of OH addition on πconjugate system of dye molecule were represented with perturbational (PMO) theory and Dewar's rules.

关 键 词：甲苯胺蓝 染色剂 溶剂极性 PH值 

分 类 号：TS193.11[轻工技术与工程—纺织化学与染整工程]