Anomalous Dynamics in tert-Butyl Alcohol-Water and Trimethylamine N-Oxide-Water Binary Mixtures: A Femtosecond Transient Absorption Study

被引：8

作者：

Banik, Debasis ^{[1
]}

Bhattacharya, Sayantan ^{[2
]}

Datta, Prasanta Kumar ^{[2
]}

Sarkar, Nilmoni ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, Kharagpur 721302, W Bengal, India

[2] Indian Inst Technol, Dept Phys, Kharagpur 721302, W Bengal, India

来源：

ACS OMEGA | 2018年 / 3卷 / 01期

关键词：

SOLVATION DYNAMICS; AQUEOUS-SOLUTIONS; METHANOL OLIGOMERS; TEMPERATURE-DEPENDENCE; ROTATIONAL-DYNAMICS; ULTRAFAST DYNAMICS; HYDROXYL STRETCH; TMAO; HYDRATION; RELAXATION;

D O I：

10.1021/acsomega.7b01595

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this article, we have investigated the unusual dynamics of tert-butyl alcohol (TBA)-water and trimethylamine N-oxide (TMAO)-water binary mixtures using solvation dynamics as a tool. For this purpose, femtosecond transient absorption spectroscopy has been employed. Although these two molecules are isosteres to each other, a significant difference in water dynamics has been observed. The solvation times in TBA-water binary mixtures are found to be between 1.5 and 15.5 ps. On the contrary, we have observed very fast dynamics in TMAO-water binary mixtures (between 210 and 600 fs). Interestingly, unusual retardation in dynamics is observed at 0.10 mole fraction of TBA and TMAO in both the binary mixtures.

引用

页码：383 / 392

页数：10

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