Tags: Physical Seminar

Gamma-ray spectroscopy provides answers to the questions of What, How (much), and Where. These questions are answered via different types of detectors and using different techniques. Multiple detector systems and the reasons for developing those systems will be discussed. Next an overview/quick history of the National Labs (Manhattan project to now) will be presented and current job / internships/ and other opportunities for collaboration with…
Azulene, a 10-π-electron aromatic molecule, is widely used as a test system due to its bright S₂ singlet state, exhibiting anti-Kasha behavior. Despite extensive studies, its gas-phase time dynamics remain controversial. We revisited Azulene in a jet-cooled molecular beam to address these dynamics with a newly developed Ultrafast Resonance-Enhanced Multiphoton Ionization (REMPI) system. In addition, we obtained the first gas-phase REMPI spectrum…
Neuronal calcium sensors (NCS), including neuronal calcium sensor 1 (NCS1) and downstream regulatory element antagonist modulator (DREAM), constitute a family of calcium-binding proteins involved in a wide range of physiological and pathological processes. These include neuronal development, exocytosis, learning and memory, pain perception, and the progression of disorders such as Alzheimer’s and Parkinson’s diseases, autism, and cancer. Over…
Increasing CO2 emissions into the atmosphere have led to global warming and other climate issues. One way to combat this is through the photocatalytic CO2 reduction reaction. In this reaction, CO2 and water are used as reactants to produce value-added products such as CO, CH4, CH3OH, and C2H5OH. TiO2 is one of the most common photocatalysts due to its relatively high efficiency, low cost, and availability. However, traditionally synthesized TiO2…
Photoelimination of ligands in transition metal complexes can create reactive species that can act as catalysts and reagents for several useful reactions. To better understand the dynamics of this process, the photoelimination of the ligands in the tricarbonylnitrosylcobalt complex was studied as a model for the elimination of nitrosyl ligands from mixed-ligand species. To do this, the cobalt complex can be ionized using resonance-enhanced multi…
Criegee intermediates, formed from the ozonolysis of alkenes, are known to have a role in atmospheric chemistry, including the modulation of the oxidizing capacity of the troposphere. Although studies have been conducted since their discovery, the synthesis of these species in the laboratory has ushered in a new wave of investigations of these structures, both theoretically and experimentally. In some of these theoretical studies, high-order…