Weak hydrogen bonding interactions in aqueous triethylamine hydrochloride probe by high pressure methods

PHYS 404

Chao-Yen Chang, m9512024@em95.ndhu.edu.tw and Hai-Chou Chang, hcchang@mail.ndhu.edu.tw. Department of Chemistry, National Dong Hwa University, Taiwan, Department of Chemistry, National Dong Hwa University, Taiwan, Hualien, Taiwan
During past years much scientific interest has been dedicated to the weak intermolecular interactions involving C–H…O or C–H…N hydrogen bonds. Several studies have shown the potential significant effect that pressure has on controlling the strength of C–H…O interactions. Our present study is an attempt to provide the experimental spectroscopic evidence of charge enhanced C–H…O interactions. For pure triethylamine, an increase in pressure leads to a blue frequency shift of the C–H bands. The high pressure study of the C–H bands for a dilute protonated triethylamine/ D2O solution yielded an unusual nonmonotonic pressure dependence. This result indicates charge-enhanced C–H…O hydrogen-bond formation at high pressure.
 

PHYS Poster Session - General Experiment
7:30 PM-10:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Hall A, Poster

Division of Physical Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008