Fundamental Study on the Parameters in Order to Quantify Solvent Effects in Solvent Dyeing

量化溶剂染色中溶剂效应的参数基础研究

基本信息

批准号：
63580049
负责人：
YOSHIDA Hiroko
金额：
$ 1.47万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

项目摘要

This work has been undertaken to quantify solvent effects in organic solvent and binary mixture solvent. Taft and his co-workers proposed Linear Solvation Energy Relationships ( LSER ) parameters in order to quntify solvent effect : pi*scale of solvent polarity, alpha scale of hydrogen bond donor, beta scale of hydrogen bond acceptor. A conventional method for evaluation of pi*, alpha, beta, scales scales were proposed based on spectroscopic measurements using solavatochromic indicators, 4-nitroaniline, N, Ndimethy-4-nitroaniline and azoniabetain dyes.The solvtochromism of these dyes was observed in nonpolar and polar solvents. The shifts of maximum wave numbers of these dyes by composition of binary mixture of solvents were analyzed by assuming the selective solvation model. The results obtained indicate that the solvation model of dyes is almost explained by the selective model.Formation and absorption spectra of inclusion between cyclodextrin and azoniabetain dyes [ A(o-OH),B(p-OH) and C(Me-p-OH) ] having large negative solvatochromism were investigated. The dyes A(OH) and A(O^-) were not included by alpha-, beta-, gamma-ciclodextrin by steric hindrance of oxygen at o-position of the dyes. Alpha-cyclodextrin can include B(O^-) and C(O^-), but not B(OH) and C(HO). While beta- and gamma- cyclodextrins gave (1 : 1) inclusions B(OH), B(O^-), C(OH) and C(O^-). Structures of inclusions were suggested on basis of their spectra.Absorption spectra of solubilization by surfactants having negative solvatochromism were investigated. Dissociatived dyes of A, B and C could be solubilized by anionic, cationic and nonionic surfactants. The results on basis of their spectra were suggested that dyes were solubilized at outside of micel of anionic surfactant and water included in inner micell of cationic and nonionic surfactants.

这项工作的目的是量化有机溶剂和二元混合物溶剂中的溶剂效应。 Taft 和他的同事提出了线性溶剂化能量关系 (LSER) 参数来量化溶剂效应：溶剂极性的 pi* 尺度、氢键供体的 alpha 尺度、氢键受体的 beta 尺度。基于使用光致变色指示剂、4-硝基苯胺、N,N-二甲基-4-硝基苯胺和偶氮甜菜碱染料的光谱测量，提出了一种评估 pi*、α、β 尺度的常规方法。极性溶剂。通过假设选择性溶剂化模型，分析了这些染料的最大波数随溶剂二元混合物组成的变化。结果表明，染料的溶剂化模型几乎可以用选择性模型来解释。环糊精与偶氮甜菜碱染料[A(o-OH)、B(p-OH)和C(Me-p-)包合物的形成和吸收光谱研究了具有大的负溶剂化显色现象的OH)]。由于染料邻位氧的空间位阻，α-、β-、γ-环糊精不包含染料A(OH)和A(O^-)。 α-环糊精可以包括B(O^-)和C(O^-)，但不包括B(OH)和C(H2O)。而 β- 和 γ- 环糊精则产生 (1:1) B(OH)、B(O^-)、C(OH) 和 C(O^-) 内含物。根据光谱推测了夹杂物的结构。研究了具有负溶剂化显色现象的表面活性剂增溶的吸收光谱。 A、B、C的离解染料可以被阴离子、阳离子和非离子表面活性剂增溶。基于它们的光谱的结果表明，染料溶解在阴离子表面活性剂的胶束外部，而水包含在阳离子和非离子表面活性剂的胶束内。