Synchrotron-Based Highest Resolution Terahertz Spectroscopy of the ν24Band System of 1,2-Dithiine (C4H4S2): A Candidate for Measuring the Parity Violating Energy Difference between Enantiomers of Chiral Molecules.
The chiral C2symmetric molecule 1,2-dithiine (1,2-dithia-3,5-hexadiene, C4H4S2) 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 ν24using highest resolution synchrotron-based interferometric Fourier transform infrared (FTIR) spectroscopy in the terahertz range with a band center of ν0= 6.95375559 THz (ν̃0= 231.952319 (10) cm-1) and two related hot bands, the (ν13+ ν24) ← ν13band at ν0= 6.97256882 THz (ν̃0= 232.579861 (33) cm-1) and the 2ν24← ν24band at ν0= 7.01400434 THz (ν̃0= 233.962001 (14) cm-1). This success in the difficult analyses of the THz spectrum of a complex chiral molecule of importance for fundamental tests on molecular parity violation is enabled by the ideal setup of an FTIR experiment of currently unique resolution with the very stable and bright synchrotron radiation at the Swiss Light Source (SLS).
Physical Chemistry, ETH Zurich , CH 8093 Zurich, Switzerland.
Sieghard
S
Albert
Physical Chemistry, ETH Zurich , CH 8093 Zurich, Switzerland.
Fabienne
F
Arn
Physical Chemistry, ETH Zurich , CH 8093 Zurich, Switzerland.
Irina
I
Bolotova
Physical Chemistry, ETH Zurich , CH 8093 Zurich, Switzerland.
Ziqiu
Z
Chen
Physical Chemistry, ETH Zurich , CH 8093 Zurich, Switzerland.
Csaba
C
Fábri
Physical Chemistry, ETH Zurich , CH 8093 Zurich, Switzerland.
Guido
G
Grassi
Swiss Light Source, PSI Villigen , CH 5232 Villigen, Switzerland.
Philippe
P
Lerch
Physical Chemistry, ETH Zurich , CH 8093 Zurich, Switzerland.
Martin
M
Quack
Physical Chemistry, ETH Zurich , CH 8093 Zurich, Switzerland.
Georg
G
Seyfang
Energy Department, PSI Villigen , CH 5232 Villigen, Switzerland.
Alexander
A
Wokaun
Physical Chemistry, ETH Zurich , CH 8093 Zurich, Switzerland.
Daniel
D
Zindel