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

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.

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

scholarly journals Electronic–Vibrational Coupling and Electron Transfer

2019 ◽  
Vol 123 (39) ◽  
pp. 23760-23772 ◽  
Author(s):  
Baxter Abraham ◽  
Luis G. C. Rego ◽  
Lars Gundlach
Keyword(s):  
Electron Transfer ◽  
Vibrational Coupling
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