Applications of broadband Chirped-Pulse Fourier Transform Microwave spectroscopy
Abstract
Rotational spectroscopy is a powerful and sensitive technique that can be used to study the structure of gas phase molecules exhibiting a permanent dipole moment. The principal moments of inertia of a molecule determine the frequencies of the rotational transitions for the molecule. This dependence can be exploited in modern rotational spectroscopy to provide a direct method for the structural characterization of gas phase molecules. Experimentally, the rotational transitions of a molecule are observed in the microwave spectral range, and these transition frequencies often can be accurately predicted using theoretical calculations. In this work we used the broadband technique of Chirped-Pulse Fourier Transform Microwave (CP-FTMW) spectroscopy to experimentally study the structure and rotational spectra of chemically interesting molecules in the gas phase. We also performed a number of calculations to compare and understand our experimental observations. We start with a review of the extensive literature on rotational spectroscopy, including Stark-field spectroscopy, microwave spectroscopy with Fabry-Perot cavities, and the relatively new technique of broadband CP-FTMW spectroscopy. We also describe some advanced modifications to the CP-FTMW technique that we have pursued in the course of our studies, including an extension into Two-Dimensional CP-FTMW spectroscopy. We finish with a review of our recent cross-departmental collaboration results and an outlook for developing the CP-FTMW technique even further.
Degree
Ph.D.
Advisors
Dian, Purdue University.
Subject Area
Analytical chemistry|Physical chemistry
Off-Campus Purdue Users:
To access this dissertation, please log in to our
proxy server.