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Polarized Resonance Synchronous Spectroscopy For Characterization Of Materials’ Optical Properties, Xiu Zhu Xu
Polarized Resonance Synchronous Spectroscopy For Characterization Of Materials’ Optical Properties, Xiu Zhu Xu
Theses and Dissertations
Optical spectroscopy is an essential tool for characterization of materials’ optical properties. Quantitatively understanding material absorption, scattering and emission properties is challenging with existing spectrometric and fluorometric techniques. The direct Polarized Resonance Synchronous Spectroscopy (PRS2) is a breakthrough to the existing spectroscopic techniques for differentiation and quantification of material absorption, scattering and emission properties including their light depolarizations and optical cross-sections. However, there are some limitations and unchecked assumptions in the direct PRS2 technique that need to be addressed during my PhD study. We first examined the effect of light scattering and absorption on their innerilter-effect (IFE) and validated that …
Interpreting Time-Resolved Spectra And Excited State Reactivity With Computational Methods, Robert Lamb
Interpreting Time-Resolved Spectra And Excited State Reactivity With Computational Methods, Robert Lamb
Theses and Dissertations
Light-harvesting compounds are developed for a variety of purposes pertaining to areas such as energy-capture, chemical transformations, and lighting. There is a need to better understand the reactivity and excited state properties of these compounds. Many experiments focus on gleaning information about reactivity by observing spectral changes over time intervals ranging from femtoseconds to minutes (IR, UV-VIS, and UV-VIS pump-probe spectroscopy). This dissertation focuses on the interpretation of the experimental data from a computational perspective and methodological studies to determine reasonable levels of theory for each system. Three vignettes of this approach will be discussed. First, a mononuclear tungsten complex …