Isotope effects on the resonance interactions and vibrational quantum dynamics of fluoroform CHF.

We report a comparison of the analysis of the low energy spectrum of CHF and CHF from the THz (FIR) range to the ν fundamental at high resolution (δ[small nu, Greek, tilde] < 0.001 cm or otherwise Doppler limited) on the basis of FTIR spectra taken both with ordinary light sources and with the synchrotron radiation from the Swiss Light Source. Several vibrational levels are accurately determined including, in particular, the 2ν CH-bending overtone and the ν CH-stretching fundamental of CHF.

Synchrotron-Based Highest Resolution Terahertz Spectroscopy of the ν Band System of 1,2-Dithiine (CHS): A Candidate for Measuring the Parity Violating Energy Difference between Enantiomers of Chiral Molecules.

The chiral C symmetric molecule 1,2-dithiine (1,2-dithia-3,5-hexadiene, CHS) has been identified as a possible candidate for measuring the parity violating energy difference between enantiomers. We report here the observation and analysis of the low-frequency fundamental ν using highest resolution synchrotron-based interferometric Fourier transform infrared (FTIR) spectroscopy in the terahertz range with a band center of ν = 6.95375559 THz (ν̃ = 231.