15min:

S. ALBERT, K. K. ALBERT, M. QUACK, PHYSICAL CHEMISTRY, ETH ZÜRICH, CH-8093 ZÜRICH, SWITZERLAND; S. BAUERECKER, INSTITUT FÜR TECHNISCHE UND PHYSIKALISCHE CHEMIE, TU BRAUNSCHWEIG, D-38106 BRAUNSCHWEIG, GERMANY.

The experimental detection of molecular parity violation\footnoteM.~Quack, J.~Stohner and M.~Willeke, Annu.~Rev.~Phys.~Chem. \textbf2008, 59 , 741, A.~Bakasov, T.K.~Ha and M.~Quack, J.~Chem.~Phys. \textbf1998, 109 , 7263, R.~Berger and M.~Quack, J.~Chem.~Phys. \textbf2000, 112 , 3148. _PVE is of great interest because of its importance in the understanding of fundamental aspects of molecular dynamics and symmetries. One possible method for this is measuring the rovibrational or rotational frequency shifts in the infrared or microwave spectra of enantiomers\footnoteM.~Quack and J.~Stohner, PRL \textbf2000, 84 , 3807, M.~Quack and J.~Stohner. J.~Chem.~Phys. \textbf2003, 119 , 11228.. A value of 50~mHz is predicted for vibrational frequency shifts in CHFBrI\footnoteJ.K.~Laerdahl, P.~Schwerdtfeger and H.M.~Quiney, PRL \textbf2000, 84 , 3811, R.~Berger and J.L.~Stuber, Mol.~Phys. \textbf2007, 105 , 41., which is almost within the range of current infrared\footnoteC.~Daussy, T.~Marrel, A.~Amy-Klein, C.~Nguyen, C.~Borde and C.~Chardonnet, Phys.~Rev.~Lett. \textbf1999, 83 , 1554 and submm wave spectroscopic resolution. We report here IR-spectroscopic results and a first high resolution analysis of the infrared spectrum of CHFBrI. The FTIR spectrum of CHFBrI was recorded at 190~K and 295~K in the regions 600--1300~cm^-1 and 1800--2350~cm^-1\footnoteS.~Albert and M.~Quack, ChemPhysChem \textbf2007, 8 , 1271.. We were able to analyse the rovibrational spectra of CHF⁷⁹BrI ( ₀ = 1060.81569~cm^-1) and CHF⁸¹BrI ( ₀ = 1060.77864~cm^-1) in the CF-stretching ( ₆) and its overtone regions with band centers ₀ = 2103.75730~cm^-1 for CHF⁷⁹BrI and ₀ = 2103.65974~cm^-1 for CHF⁸¹BrI. We will discuss a possible application of CO₂ laser quasi-resonant two photon transitions in the overtone region of CHFBrI. Finally, we will show submm spectra of CHFBrI recorded with the Zürich-FASSST spectrometer and discuss how submm wave spectroscopy based on FASSST\footnoteD.~T.~Petkie, T.~M.~Goyette, R.~P.~A.~Bettens, S.~P.~Belov, S.~Albert, P.~Helminger and F.~C.~De~Lucia, Rev. Sci. Instr. \textbf1997, 68 , 1675. and phase-locked backward wave oscillators\footnoteF.~Lewen, R.~Gendriesch, I.~Pak, D.G.~Paveliev, M.~Hepp, R.~Schieder and G.~Winnewisser, Rev.~Sci.~Instrum. \textbf1998, 69 , 32. can be used to determine line shifts on the order of mHz.