scholarly journals Probing hydrogen-bonding in binary liquid mixtures with terahertz time-domain spectroscopy: a comparison of Debye and absorption analysis

2015 ◽  
Vol 17 (8) ◽  
pp. 5999-6008 ◽  
Author(s):  
Nicholas Y. Tan ◽  
Ruoyu Li ◽  
Pierre Bräuer ◽  
Carmine D'Agostino ◽  
Lynn F. Gladden ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Time Domain ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Absorption Analysis ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy ◽  
Bonding Structure ◽  
Binary Liquid ◽  
Structure And Dynamics

Terahertz time-domain spectroscopy is used to explore hydrogen bonding structure and dynamics in binary liquid mixtures, spanning a range of protic–protic, protic–aprotic and aprotic–aprotic systems.

Thermodynamics of binary liquid mixtures with hydrogen bond interaction

1966 ◽  
Vol 19 (7) ◽  
pp. 1129 ◽  
Author(s):  
PR Naidu ◽  
VR Krishnan
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Excess Volumes ◽  
Hydrogen Bridge ◽  
Substituted Phenols ◽  
Hydrogen Bond Interaction ◽  
Binary Liquid ◽  
Bond Interaction

Excess volumes and adiabatic excess compressibilities of the systems dioxan- phenol, dioxan-o-chlorophenol, dioxan-guaiacol, dioxan-o-cresol, dioxan-m-cresol, and dioxan-p-cresol are presented at 35�. These data have been used to postulate hydrogen bonding between the components and the influence of the substituent on the strength of the hydrogen bridge between dioxan and substituted phenols is discussed.

Characterizing the Structure and Phase Transformation of Poly(ethylene Oxide)–Urea Complexes Using Terahertz Time-Domain Spectroscopy

2017 ◽  
Vol 71 (11) ◽  
pp. 2549-2554 ◽  
Author(s):  
Hai-Mu Ye ◽  
Han Li ◽  
Shu-Fang Yao
Keyword(s):  
Phase Transformation ◽  
Hydrogen Bonding ◽  
Ethylene Oxide ◽  
Time Domain ◽  
Urea Complex ◽  
Terahertz Time Domain Spectroscopy ◽  
Absorption Bands ◽  
Time Domain Spectroscopy ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Terahertz time-domain spectroscopy (THz-TDS) was employed to characterize the structure and α→β phase transformation of poly(ethylene oxide) (PEO)–urea complexes. While the THz responses of α- and β-form complexes are both originated from hydrogen bonding interactions, they possess different THz absorption bands. The α-form PEO–urea complex shows two bands at 1.12 and 1.24 THz, which are vibration modes due to the hydrogen bonding among urea and between PEO and urea, respectively; the β-form PEO–urea complex shows a band at 1.48 THz, which is a vibration mode due to the hydrogen bonding among urea. A polarized THz-TDS study demonstrates that the urea–urea hydrogen bonding direction rotates 90° during the β→α transformation process. This study reveals the great potential of THz-TDS for investigating polymer–small molecule complexes.

scholarly journals Acoustical Studies on Binary Liquid Mixtures of Some 1,3,4-Oxadiazole Derivatives with Acetone at 303.15 K

2013 ◽  
Vol 24 ◽  
pp. 124-133
Author(s):  
G. Alamelumangai ◽  
N. Santhi
Keyword(s):  
Hydrogen Bonding ◽  
Relaxation Time ◽  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Wide Spread ◽  
Acoustical Parameters ◽  
Binary Liquid ◽  
Oxadiazole Derivatives

The wide spread use of 1,3,4-oxadiazoles as a scaffold in medicinal chemistry establishes this moiety as an important bioactive class of heterocycles. In the present study ultrasonic velocity (u), density (ρ) and viscosity (η) have been measured at frequency 2 MHz in the binary mixtures of 1,3,4-oxadiazole derivatives in acetone at 303.15 K using ultrasonic interferometer technique. The measured value of ultrasonic velocity, density and viscosity have been used to estimate the acoustical parameters namely adiabatic compressibility (βad), relaxation time (τ), acoustic impedance (Zi), free length (Lf), free volume (Vf) and internal pressure (πi), with a view to investigate the nature and strength of molecular interactions. The obtained result support the occurrence of molecular association through hydrogen bonding in the binary liquid mixtures.

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