Laser Diagnostics of the Mesoscale Heterogeneity of Aqueous Solutions of Polar Organic Compounds

被引：14

作者：

Bunkin, N. F. ^{[1
,2
]}

Lyakhov, G. A. ^{[2
]}

Shkirin, A. V. ^{[2
,3
]}

Krivokhizha, S. V. ^{[4
]}

Afonin, A. A. ^{[5
]}

Kobelev, A. V. ^{[5
]}

Penkov, N. V. ^{[5
]}

Fesenko, E. E., Jr. ^{[5
]}

机构：

[1] Bauman State Tech Univ, Vtoraya Baumanskaya Ul 5, Moscow 105005, Russia

[2] Russian Acad Sci, Prokhorov Gen Phys Inst, Ul Vavilova 38, Moscow 119991, Russia

[3] Natl Res Nucl Univ MEPhI, Kashirskoe Sh 31, Moscow 115409, Russia

[4] Russian Acad Sci, Lebedev Phys Inst, Leninskiy Pr 53, Moscow 119991, Russia

[5] Russian Acad Sci, Inst Cell Biophys, Ul Inst Skaya 3, Pushchino 142290, Moscow Region, Russia

来源：

PHYSICS OF WAVE PHENOMENA | 2018年 / 26卷 / 01期

关键词：

TERT-BUTYL ALCOHOL; CLATHRATE HYDRATE FORMATION; NOISE-INDUCED TRANSITIONS; LIGHT-SCATTERING; BINARY-MIXTURES; COLORED-NOISE; WATER; VISCOSITY; INHOMOGENEITIES; TETRAHYDROFURAN;

D O I：

10.3103/S1541308X18010041

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A mesoscale droplet phase, which is spontaneously formed in aqueous solutions of some polar organic compounds, has been experimentally investigated by methods of dynamic light scattering and laser phase microscopy. It is shown that tetrahydrofuran and tert-butanol aqueous solutions demonstrate a strong peak of light scattering intensity in the range of molecular concentrations of about 0.02 to 0.08, which corresponds to inhomogeneities with a characteristic size of about 100 nm. These liquid droplets are enriched with molecules of dissolved substance. A similar light scattering peak for aqueous solutions of glycerol and ethylene glycol is less pronounced. A theoretical model of the phase separation of binary solutions with twinkling (i.e., existing for a finite time) intermolecular hydrogen bonds is developed. The model predicts the existence of an additional low-concentration light scattering peak near the spinodal of the solution free of hydrogen bonds. A characterization of solutions according to the numerical values of twinkling hydrogen bond parameters is outlined.

引用

页码：21 / 35

页数：15

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