Pressure-tuning infrared and Raman spectroscopy of group 14 tetraphenyl compounds
S D Warner1, I S Butler, I Wharf
1Department of Chemistry, McGill University, Montreal, Quebec, Canada.
Abstract:
The effect of high external pressures on the vibrational spectra of the tetraphenyl Group 14 compounds, Ph4M (M = Si, Ge, Sn, Pb), were examined between ambient pressure and 40 kbar with the aid of a diamond-anvil cell. The four compounds displayed similar behaviour as the pressure was increased and a structural transition at approximately 15 kbar, most probably associated with a phenyl ring rotation, was identified in each case. The pressure dependencies of selected vibrational modes were obtained.
Related Concept Videos
Raman Spectroscopy: Overview
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
IR Spectroscopy: Molecular Vibration Overview
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
Spectroscopy of Carboxylic Acid Derivatives
In the...
Infrared (IR) Spectroscopy: Overview
Different compounds display unique properties due to their...

