News & Events
Chemistry Weekly Seminar - Sahan Neelakanni
Posted on 2017-09-20 in Events
Dec 1, 2017
Systematic Investigation of Intermolecular Interactions in Near Edge X-ray Absorption Spectroscopy (NEXAFS)
Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy can be used to study molecular packing and order in organic materials, if the effect of intermolecular interactions on this spectroscopy is understood. This work aims to contribute towards a general understanding of intermolecular effects on NEXAFS spectroscopy by studying the variation in Rydberg-valence interactions for saturated molecules and π-π interactions for unsaturated molecules.
The effect of π-π interactions with the spacing between co-facial benzene rings is significant and could provide a mechanism to study molecular packing and order in unsaturated materials. Orthorhombic and monoclinic n-alkane single crystals were used to study Rydberg-valence mixing in saturated molecules. In the NEXAFS spectra of crystalline n-alkanes, different crystalline environments are found to not have a significant effect on the NEXAFS spectra. However, a contribution from nuclear motion to broadening of the NEXAFS features was observed; this broadening varies with the n-alkane chain length. Nuclear motion refers to the energetically accessible molecular conformations present at the experimental temperature. Intermolecular interactions and different nuclear motions of a molecule modify the NEXAFS spectroscopy.
Chemistry Special Seminar - Dr. Mukund Jha
Posted on 2019-07-16
Dr. Mukhund Jha, Nipissing University, will present a special seminar at 10:30 a.m. in Thorvaldson 205A.
Chemistry Special Seminar - Dr. John Sorensen
Posted on 2019-07-08
Dr. John Sorensen, University of Manitoba, will present a special seminar at 10:30 am in Thorvaldson 205A.
Chemistry Special Seminar - Dr. Ashok Kakkar
Posted on 2019-07-04
Dr. Ashok Kakkar, McGill University, will present a special seminar at 10:00 a.m. in Thorvaldson 159.
Chemistry Special Seminar - Dr. Jean-Francois Morin
Posted on 2019-06-27
Dr. Jean-Francois Morin of Universite Laval will present a special seminar at 10:30 am in Thorvaldson 159.
Chemistry Special Seminar - Dr. Sanjai Kumar Pathak
Posted on 2019-06-14
Dr. Sanjai Kumar Pathak, Queens College and Graduate Center of CUNY, New York will present a special seminar.
Chemistry Special Seminar - Dr. Claude Spino
Posted on 2019-05-21
Dr. Claude Spino, Universite de Sherbrooke, will present a special seminar at 11:00 a.m. in Thorvaldson 159.