Anharmonic coupling behind vibrational spectra of solvated ammonium: lighting up overtone states by Fermi resonance through tuning solvation environments

2020 ◽  
Vol 22 (41) ◽  
pp. 24059-24069
Author(s):  
Chih-Kai Lin ◽  
Qian-Rui Huang ◽  
Jer-Lai Kuo
Keyword(s):  
Vibrational Spectra ◽  
Fermi Resonance ◽  
Anharmonic Coupling ◽  
Anharmonic Couplings

Fascinating Fermi resonance bands emerge from anharmonic couplings between NH stretching fundamentals and bending overtones in ammonium-centered clusters.

Anharmonic Coupling Revealed by the Vibrational Spectra of Solvated Protonated Methanol: Fermi Resonance, Combination Bands, and Isotope Effect

2021 ◽  
Vol 125 (9) ◽  
pp. 1910-1918
Author(s):  
Chih-Kai Lin ◽  
Qian-Rui Huang ◽  
Ying-Cheng Li ◽  
Ha-Quyen Nguyen ◽  
Jer-Lai Kuo ◽  
...  
Keyword(s):  
Isotope Effect ◽  
Vibrational Spectra ◽  
Fermi Resonance ◽  
Anharmonic Coupling ◽  
Combination Bands

Fermi Resonance Effects on the Vibration Modes of Hydrogen-Passivated Boron in Silicon

1989 ◽  
Vol 163 ◽  
Author(s):  
G.D. Watkins ◽  
W.B. Fowler ◽  
G.G. Deleo ◽  
M. Stavola ◽  
D.M. Kozuch ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Fermi Resonance ◽  
Vibration Modes ◽  
Natural Explanation ◽  
Resonance Effects ◽  
Quantum Mechanical Treatment ◽  
Simple Quantum ◽  
Anharmonic Coupling ◽  
Quantitative Explanation ◽  
Direct Confirmation

Abstract10B - 11B isotope shifts have been reported recently for the vibrational frequencies of hydrogen (H) and its isotope deuterium (D) in the H-B complex in silicon. The D-10 B - D11 B shift was found to be anomalously large. We show that this effect finds a natural explanation in a phenomenon called “Fermi resonance”, arising from a weak anharmonic coupling between the second harmonic of the transverse B vibration and the longitudinal D vibration. We first present a simple classical explanation of the effect in terms of a “parametric oscillator”, or a child pumping a swing. We then outline a simple quantum mechanical treatment that provides a satisfactory quantitative explanation of the results. Our calculations also predict infrared absorption at the boron second harmonic frequencies. These are observed for both 10B and 11B with intensities and polarization as predicted, providing direct confirmation of the interpretation. The Pankove Si-H-B model, therefore, remains intact.

Understanding Fermi resonances in the complex vibrational spectra of the methyl groups in methylamines

2021 ◽  
Vol 23 (6) ◽  
pp. 3739-3747
Author(s):  
Qian-Rui Huang ◽  
Tomoya Endo ◽  
Saurabh Mishra ◽  
Bingbing Zhang ◽  
Li-Wei Chen ◽  
...  
Keyword(s):  
Vibrational Spectra ◽  
Fermi Resonance ◽  
Methyl Groups ◽  
Spectral Features ◽  
Fermi Resonances

Vibrational spectra of the methyl groups in mono-methylamine (MMA), dimethylamine (DMA), and trimethylamine (TMA) monomers and their clusters were measured to capture their spectral features as a result of bend/umbrella-stretch Fermi resonance (FR).

Manifestation of Fermi resonance in the vibrational spectra of 5-ioduracil, and its deutero-derivatives isolated in low-temperature Ar matrices

2014 ◽  
Vol 40 (12) ◽  
pp. 1097-1103 ◽  
Author(s):  
A. Yu. Ivanov ◽  
Yu. V. Rubin ◽  
S. A. Egupov ◽  
L. F. Belous ◽  
V. A. Karachevtsev
Keyword(s):  
Low Temperature ◽  
Vibrational Spectra ◽  
Fermi Resonance

Anharmonic interactions and Fermi resonance in the vibrational spectra of alcohols

2002 ◽  
Vol 605 (2-3) ◽  
pp. 187-198 ◽  
Author(s):  
N.A. Atamas ◽  
A.M. Yaremko ◽  
L.A. Bulavin ◽  
V.E. Pogorelov ◽  
S. Berski ◽  
...  
Keyword(s):  
Vibrational Spectra ◽  
Fermi Resonance ◽  
Anharmonic Interactions

Vibrational spectroscopy of protonated amine–water clusters: tuning Fermi resonance and lighting up dark states

2020 ◽  
Vol 22 (38) ◽  
pp. 22035-22046 ◽  
Author(s):  
Chih-Kai Lin ◽  
Ryunosuke Shishido ◽  
Qian-Rui Huang ◽  
Asuka Fujii ◽  
Jer-Lai Kuo
Keyword(s):  
Vibrational Spectroscopy ◽  
Water Clusters ◽  
Fermi Resonance ◽  
Protonated Amine ◽  
Pass Through ◽  
Anharmonic Couplings

The H-bonded NH stretching fundamentals of protonated amine–water clusters pass through the “Fermi resonance window” formed by bending overtones, generating split bands due to anharmonic couplings.

Strong Fermi Resonance Associated with Proton Motions Revealed by Vibrational Spectra of Asymmetric Proton‐Bound Dimers

2020 ◽  
Author(s):  
Qian‐Rui Huang ◽  
Ryunosuke Shishido ◽  
Chih‐Kai Lin ◽  
Chen‐Wei Tsai ◽  
Jake A. Tan ◽  
...  
Keyword(s):  
Vibrational Spectra ◽  
Fermi Resonance
Sign in / Sign up

Export Citation Format

Share Document