Tags: Physical Seminar


Energetics of Formation of Cyclacenes from
2,3-Didehydroacenes and Implications for Astrochemistry

The carriers of the diffuse interstellar bands (DIBs) are still largely unknown although polycyclic aromatic hydrocarbons, carbon chains, and fullerenes are likely candidates. A recent analysis of the properties of n-acenes of general formula C4n+2H2n+4 suggested that these could be potential carriers of some DIBs. Dehydrogenation reactions of n-acenes after absorption of an interstellar UV photon may result in dehydroacenes. Here the…


Research Seminar: Daelyn Ashley


Research Seminar: Carson Tang


An Introduction to Gamma-Ray Spectroscopy and Its Applications

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…


Building Quantum-State Resolved Ultrafast Spectroscopy: Azulene as the Best (or Worst?) Test Molecule

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…


Downstream Regulatory Element Antagonist Modulator and Neuronal Calcium Sensor One As Potential Targets for Neurotoxins, Drugs, and Pollutants

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…


Research Seminar: Alexander Heide


Magnetic Fields in TiO2 Synthesis: Targeting Multicarbon Products from the CO2 Reduction Reaction

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

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…


Enthalpies of Formation for Criegee Intermediates: A Correlation Energy Convergence Study

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…
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