Time and location: Unless otherwise noted, seminars will be held on Friday in the Life Sciences Annex Auditorium (A-101) at 3:30 PM. Check the individual notices posted in the hallways or your e-mail box for confirmation of times and locations.
|Date||Talk Title||Speaker||Speaker Institution||Host|
|1/13||Safety Seminar (mandatory attendance)||LSU (Chemistry)||David Spivak|
|1/27||Forum on the LSU Chemistry Graduate Program||Multiple||LSU (Chemistry)||
Dr. Taylor/Dr. Gilman/CGSC
|2/3||Development of Efficient Artificial Nucleases for DNA Cleavage by Metal (II) Complexes||Salah S. Massoud||University of Louisiana, Lafayette||George Stanley|
|2/17||RESERVED FOR RECRUITING / POSTER SESSION||Multiple||LSU (Chemistry)||Caroline Schneider|
|2/24||New Developments in Mass Spectrometry-based Metabolomics||Facundo M Fernadez||Georgia Tech.||Kermit Murray|
|3/3||Engineered Nanomaterials in the Environment: Potential Risks and Processes||Baoshan Xing||UMass||Robert Cook|
|3/10||RESERVED FOR RECRUITING / POSTER SESSION||Multiple||LSU (Chemistry)||Caroline Schneider|
|3/17||Hidden Figures||Carol Taylor|
|3/24||RESERVED FOR RECRUITING / POSTER SESSION||Multiple||LSU (Chemistry)||Caroline Schneider|
|3/31||Spectroscopy of Single Plasmonic Nanoparticles||Greg Hartland||Notre Dame||Louis Haber|
|4/7||RESERVED by Chair||Carol Taylor|
|4/21||Room Temperature Ionic Liquids: Dynamics, Interactions, and the Role of Electric Fields||Michael Fayer||Stanford||Daniel Kuroda|
|4/28||Graduate Awards||Doug Gilman||LSU (Chemistry)||Doug Gilman|
For inquiries regarding the Chemistry Colloquium, please contact Professor Robert L. Cook (firstname.lastname@example.org)
Baoshan Xing's Abstract: Engineered nanomaterials (ENMs) (in a size range of 1-100 nm) are found in an increasing number of the consumer and food products (e.g., lotions, socks, chewing gums), and are being used in many biomedical and environmental applications due to the rapid development and use of nanotechnology. Because of their high-volume production and widespread use, these engineered nanomaterials (ENMs) are being released into the environment. In this seminar, Dr. Xing will discuss the uptake of ENMs by plants, nanotoxicity to various organisms and the environmental processes involved in dispersion and transformation.
Michael Fayer's Abstract: Room temperature ionic liquids (RTILs) have properties that are distinct from other ionic liquids and from common organic liquids. RTILs are liquid around room temperature in contrast to, e.g., liquid NaCl, which melts at 1074 K. The low melting point of RTILs is typically achieved by using molecular ions, often organic, that are asymmetric, large, have diffuse or delocalized charge, or some combination of these properties. The presence of these properties in the cation, anion, or both, prevents crystallization by reducing the enthalpic incentive and/or increasing the entropic cost. The large number of cation and anion combinations result in a vast number of liquids with distinct properties. The wide range of properties makes them useful in, or being considered for, a variety of applications. Ultrafast two dimensional infrared (2D IR) and IR polarization selective pump-probe (PSPP) experiments were used to investigate the dynamics of the room temperature ionic liquids CnmimNTf2 (1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide). The alkyl chains are ethyl, butyl, hexyl, and decyl. Several IR vibrational probes were used to study the RTILs, particularly SeCN‒, BmimSeCN+, and CO2. The 2D IR and PSPP experiments provide a wealth of information on the time scales and nature of the RTILs’ dynamical structures. It is shown that electric fields in the liquids are an important source of the intermolecular interactions of the vibrational probe solutes with the RTILs. RTILs are being developed for CO2 capture. Experiments in bulk EmimNTf2 are compared to experiments in Supported Ionic Liquid Membranes, that is, porous polymer films, which will be important in CO2 capture applications. Substantial differences in dynamics are observed in spite of the large pore sizes in the membranes.