First-Order London Dispersion Forces and Microwave Spectral Linewidth

Krishnaji,; Srivastava, S. L.

doi:10.1063/1.1726257

Cited by 47 publications

(3 citation statements)

References 7 publications

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“…At a fundamental level, it is important to remember that the spectral line width of infrared and microwave spectra depend on electrostatic, induction, and dispersion forces. In the last case, the line widths must naturally be related to the mutual spontaneous polarization of the interacting partners 220. Dispersion is the only force that holds together noble gas clusters (e.g.…”

Section: Manifestations and Consequencesmentioning

confidence: 99%

London Dispersion in Molecular Chemistry—Reconsidering Steric Effects

2015

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London dispersion, which constitutes the attractive part of the famous van der Waals potential, has long been underappreciated in molecular chemistry as an important element of structural stability, and thus affects chemical reactivity and catalysis. This negligence is due to the common notion that dispersion is weak, which is only true for one pair of interacting atoms. For increasingly larger structures, the overall dispersion contribution grows rapidly and can amount to tens of kcal mol(-1) . This Review collects and emphasizes the importance of inter- and intramolecular dispersion for molecules consisting mostly of first row atoms. The synergy of experiment and theory has now reached a stage where dispersion effects can be examined in fine detail. This forces us to reconsider our perception of steric hindrance and stereoelectronic effects. The quantitation of dispersion energy donors will improve our ability to design sophisticated molecular structures and much better catalysts.

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Section: Manifestations and Consequencesmentioning

confidence: 99%

London Dispersion in Molecular Chemistry—Reconsidering Steric Effects

2015

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“…To derive the expression for the cross section Eq. ( 21) Krishnaji [11] used the London dispersive potential for the molecule^atom system [11,18,22],…”

Section: Discussionmentioning

confidence: 99%

Molecular Collision Cross Section of the CHF₃Molecule Due to Higher Order Interactions

Gierszal¹,

Galica²,

Miś-Kuźmińska³

2000

Phys. Scr.

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“…DI water is pure polar in nature whereas turmeric is a non-polar compound having no permanent dipole moment. The interaction of non-polar molecules inside the turmeric leads to redistribute their electron density and thereby initiates the formation of instantaneous dipoles [257,258]. Thus, the dielectric behavior of a turmeric-DI water dispersed system will be primarily governed by such instantaneous dipoles.…”

Section: Gradual Change Of Effective Dipole Moment With Adulterant Co...mentioning

confidence: 99%

On-chip detection and quantification of soap as an adulterant in milk employing electrical impedance spectroscopy

Das

Chakraborty

Karmakar

et al. 2018

2018 International Symposium on Devices, Circuits and Systems (ISDCS)

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Electrical Impedance Spectroscopy (EIS) technique is found to be an excellent candidate for bio-sensing and food quality monitoring applications due to its rapid, robust, cost-effective and point-of-care approach. The present research work investigates the implementation of EIS technique supported by several optical spectroscopic techniques such as Ultraviolet-Visible (UV-Vis) and Fourier Transform Mid Infrared (FT-MIR) to detect and quantify several toxic adulterants in foods and bio-consumables. A comprehensive understanding on the background theory related to the study has been developed to analyze the overall polarization of the system and the effect of frequency on complex permittivity of such system have been observed. In the current work, the technique is applied to adulterated saccharides, honey and turmeric samples through a prototype sensing device. All the corresponding measurements have been performed by dipping a custom-made parallel plate conductivity cell with unity cell constant inside the solution under test. EIS study exhibited a steady variation of electrical parameters such as Contents List of Figures (i-v) List of Tables (vi-vii) List of Symbols (viii-xii) List of Publications (xiii-xvi)

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First-Order London Dispersion Forces and Microwave Spectral Linewidth

Abstract: A theory for the collision cross section due to first-order London dispersion forces has been developed on the basis of the Anderson—Tsao—Curnutte's theory of pressure broadening. The widths of OCS J = 1→2 line broadened by helium and argon are explained.

Cited by 47 publications

References 7 publications

London Dispersion in Molecular Chemistry—Reconsidering Steric Effects

London Dispersion in Molecular Chemistry—Reconsidering Steric Effects

Molecular Collision Cross Section of the CHF₃Molecule Due to Higher Order Interactions

On-chip detection and quantification of soap as an adulterant in milk employing electrical impedance spectroscopy

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First-Order London Dispersion Forces and Microwave Spectral Linewidth

Abstract: A theory for the collision cross section due to first-order London dispersion forces has been developed on the basis of the Anderson—Tsao—Curnutte's theory of pressure broadening. The widths of OCS J = 1→2 line broadened by helium and argon are explained.

Cited by 47 publications

References 7 publications

London Dispersion in Molecular Chemistry—Reconsidering Steric Effects

London Dispersion in Molecular Chemistry—Reconsidering Steric Effects

Molecular Collision Cross Section of the CHF3Molecule Due to Higher Order Interactions

On-chip detection and quantification of soap as an adulterant in milk employing electrical impedance spectroscopy

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Molecular Collision Cross Section of the CHF₃Molecule Due to Higher Order Interactions