Faithin Omaha eBook Collection

Download or read book Ultrafast Multi-Dimensional Infrared Spectroscopy of Gases at Low and High Pressures written by and published by . This book was released on 2005 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared pump-probe experiments were used to study vibrational relaxation of polyatomic molecules in supercritical fluids and the gas phase. IR pump-probe experiments and theory were used to investigate hydrogen bond dynamics in oligomers of alcohols. Vibrational echo correlation spectroscopy (VECS) was developed and experiments were performed on molecules in liquids and gases. VECS is an ultrafast multidimensional approach that is in many respects the vibrational equivalent of multidimensional NMR. VECS experiments have been performed on molecules in liquids and gases. The OD hydroxyl stretch of HOD in water was studied and the results were compared to theoretical simulation models of water. The time evolution of the vibrational echo correlation spectrum reflects the structural evolution of the hydrogen bond networks in water. The experiments and theory provide detailed tests of water models. A gas cell for performing ultrafast infrared experiments was developed and the first vibrational echo correlation spectroscopy experiments were performed in the gas phase. VECS was also been demonstrated as a new type of analytical tool that can aid in sorting out congested vibrational spectra.