Preferential Solvation in Aqueous–Organic Mixed Solvents Using Solvatochromic Indicators
Preferential Solvation in Aqueous–Organic Mixed Solvents Using Solvatochromic Indicators
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使用溶剂变色指示剂在水-有机混合溶剂中优先溶剂化
DOI：
10.1023/a:1015859315320
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发表时间：
2002
影响因子：
1.2
通讯作者：
T. Takamuku
中科院分区：
文献类型：
--
作者：
Y. Wu;M. Tabata;T. Takamuku
系统地研究了4-(N，N-二甲氨基)苯甲腈(DMABN)在纯水、甲醇、乙醇、正丙醇、异丙醇、丙酮、乙腈以及相应的水-有机二元混合溶剂中扭曲的分子内电荷转移(TICT)荧光的溶致变色性，并根据DMABN的溶致变色性定义了一个经验溶剂极性标度(FB)。用逐步溶剂交换(SSE)模型分析了所研究的二元混合溶剂的FB参数与溶剂组成的关系，以阐明探针染料在这些二元混合溶剂中的优先溶剂化(PS)。绘制了混合溶剂中DMABN分子的溶剂化图，即DMABN分子的溶剂化壳层中的局部溶剂组成作为本体溶剂组成的函数，以可视化PS在这些混合溶剂中的情况。为了比较，对2，6-二苯基-4-(2，4，6-三苯基吡啶-1-基)酚(ET-30)和芘(Py)在这些混合溶剂中的溶剂变色性进行了类似的PS分析，并从探针染料的化学性质、混合溶剂的性质以及溶质-溶剂和溶剂-溶剂相互作用的角度讨论了混合溶剂对DMABN、ET-30和Py这三种特定指示剂染料的PS响应模式。
Solvatochromism of the twisted intramolecular charge-transfer (TICT) fluorescence of 4-(N,N-dimethylamino)benzonitrile (DMABN) in pure water, methanol, ethanol, 1-propanol, 2-propanol, acetone, acetonitrile, and in the corresponding aqueous–organic binary mixed solvents was systematically studied and an empirical solvent polarity scale (FB) based on the DMABN solvatochromism was defined. The FB parameters of the explored binary mixed solvents as a function of solvent composition were analyzed by a stepwise solvent-exchange (SSE) model to clarify the preferential solvation (PS) of the probe dye in these binary mixed solvents. Solvation diagrams toward DMABN in the mixed solvents, i.e., the local solvent composition in the solvation shell of DMABN molecules was depicted as a function of bulk solvent composition to visualize the PS in these mixed solvents. For comparison, a similar PS analysis was applied to the solvatochromism of 2,6-diphenyl-4-(2,4,6-triphenylpyridinium-1- yl)phenolate (ET-30) and pyrene (Py) in these mixed solvents; the responsive PS pattern of the mixed solvents toward the specific indicator dye of DMABN, ET-30, and Py was then discussed in terms of the chemical properties of the probe dye, the properties of the mixed solvents, and the solute–solvent and solvent–solvent interactions.
反相液相色谱中的保留：同源醇-水二元流动相的溶剂化显色研究。
DOI：
10.1016/s0021-9673(01)82057-4
发表时间：
1988
期刊：
Journal of chromatography
影响因子：
--
作者：
Michels,JJ;Dorsey,JG
通讯作者：
Dorsey,JG