Next Section Meeting
Date: Thursday, April 6
Place: Berry Auditorium (C101)
Glaske Science and Engineering Building
Dinner: On your own
Time: Speaker 7:00 P.M. (No charge for the talk)
Student Research Presentations
This research focuses on the use of electrochemical devices for identification and quantification of chemical compounds in forensic chemistry. By determining the reduction and oxidation of chemical compounds, electrochemical devices provide an accurate and fast way to analyses and detect a range of concentration of illicit drugs. This portion of the research, aims at detecting the redox reaction of caffeine in order to be able to perform the same experiments with illicit drugs.
Zapping Reactions and Imagining New Lithium‐Ion Batteries:
Practical and Theoretical LeTourneau Chemistry Research Darby Ball
As the title implies, this presentation will be split between two sets of chemistry research performed at LeTourneau University. The first set is the testing and optimization of several organic reactions in a home microwave modified to perform reflux reactions with Dr. Hathaway. The second is the first principle development of Gilbert‐Ida potentials of oxy‐sulfide glasses from cluster calculations with Dr. DeBoer.
Many organic reactions take significant time to complete, which can be detrimental to an undergraduate lab experience. The goal of this study was to investigate the viability of performing several organic reactions in a home microwave modified to allow reflux, with a particular focus on the Diels‐Alder reaction between substituted N‐phenylmaleimides and anthracene. In a typical lab setup, the reaction took upwards of an hour, with significant time spent on just getting the solution up to a high enough temperature to react. In a microwave oven, the solution can in minutes be raised to the same temperatures, greatly reducing the time spent on the reaction. This study compared yields and purity of product, and in the case of this Diels‐Alder reaction, found the microwave reaction to be comparable while saving time.
Lithium‐ion batteries have enabled a dramatic revolution in portable electronics while currently operating a full 10 times below their theoretical capacity. Current lithium‐ion batteries use flammable organic liquid electrolytes which can be replaced with a solid electrolyte to enable the safe use of significantly higher capacity lithium metal anodes. The goal of this study is to develop accurate, predictive parameters for atomic interactions of the lithium ion with the solid, glass electrolytes of varying oxy‐sulfide compositions: Li2SiO3 and Li2SiS3, and Li2SiO(3‐x)Sx. Using the electronic structure program Gaussian 09, potential energy scans were performed on small molecule clusters in a simulated crystalline structure, using several different basis sets at a Hartree‐Fock level. The data was fit to obtain pairwise Gilbert‐Ida potential parameters which can be used in molecular dynamics studies using LAMMPS to model Li+ mobility in the oxy‐sulfide glass systems.
Flooding along the Red River is rare across portions of the Red River Basin of Northwest Louisiana. However, several events of heavy rainfall fell across the middle and lower portions of the Red River Basin of Southern Oklahoma, Northeast Texas, Southwest Arkansas, and Northwest Louisiana between May 2015 and May 2016, resulting in multiple flood crests along numerous points between Lake Texoma along the Texas‐Oklahoma border to Alexandria, Louisiana.
This accounted for five separate flood crests at the Red River in Shreveport, Louisiana, including the highest crest since April 1945 and the first flood since May 1990. These series of crests occurred during one of the strongest El Niño events on record. Several other flood and near flood crests are also noted in Shreveport’s history during past El Niño events since 1950.
This study will compare synoptic patterns and rainfall distributions during past El Niño events when flooding occurred along the Red River in Shreveport. The synoptic patterns associated with El Niño will also be compared with the 1950‐2015 means for that time period. In addition, past flood event analysis and impacts will be addressed to determine any correlations between the effects of El Niño, as well as other potential atmospheric, geologic, and manmade factors that may have contributed to the increased instances of flooding along the Red River in Shreveport.