University of North Dakota Faculty/Staff Newsletter

Physics and Astrophysics colloquium is Feb. 26

Physics and Astrophysics will host a colloquium at 4 p.m. Friday, Feb. 26, in 211 Witmer Hall featuring Darin Ulness, chemistry, Concordia College. Coffee and cookies will be served at 4 p.m. in 215 Witmer Hall.

Abstract: Halogen bonding is very much analogous to hydrogen bonding in that it is a relatively strong direction interaction between a halogen on one molecule and an oxygen or nitrogen on an adjacent molecule. Although halogen bonding has been known for some time, it has only recently seen extensive study in areas as diverse as pharmacology and nanocrystal engineering. Our work centers on studying the effects of halogen bonding of iodo perfluoroalkanes on the vibrational modes of pyridine in liquid mixtures. This talk will present an introduction to halogen bonding, some recent spectroscopic results from our group and what we think those results imply about the nature of several iodo perfluoroalkanes.

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