Ultrafast vibrational coupling between C H and C O band of cyclic amide 2-Pyrrolidinone revealed by 2DIR spectroscopy

2020 ◽  
Vol 228 ◽  
pp. 117749 ◽  
Author(s):  
Kiran Sankar Maiti
Keyword(s):  
Vibrational Coupling ◽  
Cyclic Amide ◽  
2Dir Spectroscopy

Broadband two dimensional infrared spectroscopy of cyclic amide 2-Pyrrolidinone

2015 ◽  
Vol 17 (38) ◽  
pp. 24998-25003 ◽  
Author(s):  
Kiran Sankar Maiti
Keyword(s):  
Technological Development ◽  
Biological Molecules ◽  
Two Dimensional ◽  
Complex Molecules ◽  
The Past ◽  
Cyclic Amide ◽  
2Dir Spectroscopy ◽  
Physical And Chemical ◽  
Two Dimensional Infrared Spectroscopy ◽  
Half Decade

In the past one-and-a-half decade there has been a significant methodological and technological development of two dimensional infrared (2DIR) spectroscopy, which unfolds many underlying physical and chemical processes of complex molecules, especially for biological molecules.

Infrared spectra and substituent effects in 2-(3-, and 4-substituted phenylmethylene)-1,3-cycloheptanediones

1983 ◽  
Vol 48 (2) ◽  
pp. 586-595 ◽  
Author(s):  
Alexander Perjéssy ◽  
Pavol Hrnčiar ◽  
Ján Šraga
Keyword(s):  
Substituent Effects ◽  
Phenyl Group ◽  
Wave Number ◽  
Vibrational Coupling ◽  
Wave Numbers ◽  
Stretching Vibration ◽  
Stretching Vibrations ◽  
The Relationship ◽  
Derivatives Of ◽  
Effect Of Structure

The wave numbers of the fundamental C=O and C=C stretching vibrations, as well as that of the first overtone of C=O stretching vibration of 2-(3-, and 4-substituted phenylmethylene)-1,3-cycloheptanediones and 1,3-cycloheptanedione were measured in tetrachloromethane and chloroform. The spectral data were correlated with σ+ constants of substituents attached to phenyl group and with wave number shifts of the C=O stretching vibration of substituted acetophenones. The slope of the linear dependence ν vs ν+ of the C=C stretching vibration of the ethylenic group was found to be more than two times higher than that of the analogous correlation of the C=O stretching vibration. Positive values of anharmonicity for asymmetric C=O stretching vibration can be considered as an evidence of the vibrational coupling in a cyclic 1,3-dicarbonyl system similarly, as with derivatives of 1,3-indanedione. The relationship between the wave numbers of the symmetric and asymmetric C=O stretching vibrations indicates that the effect of structure upon both vibrations is symmetric. The vibrational coupling in 1,3-cycloheptanediones and the application of Seth-Paul-Van-Duyse equation is discussed in relation to analogous results obtained for other cyclic 1,3-dicarbonyl compounds.

Heterionic vibrational coupling in crystalline methylammonium nitrate

1992 ◽  
Vol 88 (12) ◽  
pp. 1631 ◽  
Author(s):  
Upali A. Jayasooriya ◽  
Sidney F. A. Kettle ◽  
Richard Mortimer ◽  
Juergen Eckert ◽  
Nancy K. McGuire
Keyword(s):  
Vibrational Coupling

Theoretical vibrational spectra of OH−(H2O)2: the effect of quantum distribution and vibrational coupling

2015 ◽  
Vol 17 (38) ◽  
pp. 25505-25515 ◽  
Author(s):  
Yudai Ogata ◽  
Yukio Kawashima ◽  
Kaito Takahashi ◽  
Masanori Tachikawa
Keyword(s):  
Vibrational Spectra ◽  
Quantum Distribution ◽  
Vibrational Coupling

Quantum distribution of OH−(H2O)2 and the vibrational spectra computed using these geometries.

Electron-vibrational coupling on the absorption spectrum of dithienyl-diketopyrrolopyrrole dye

2021 ◽  
Vol 187 ◽  
pp. 109140
Author(s):  
Luis O. de Araujo ◽  
Alfredo L. Neto ◽  
Lucas Scalon ◽  
Paula C. Rodrigues ◽  
João B. Floriano ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Vibrational Coupling
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