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Title:DESIGN AND APPLICATIONS OF A MASS-CORRELATED BROADBAND MICROWAVE SPECTROMETER
Author(s):Fritz, Sean
Contributor(s):Zwier, Timothy S.; Hays, Brian M.; Hernandez-Castillo, Alicia O.
Subject(s):Structure determination
Abstract:Chirped pulse Fourier transform microwave (CP-FTMW) spectroscopy serves as a faster-than-ever technique for structure determination that is being utilized in an ever-widening range of applications. Vacuum ultraviolet (VUV) time-of-flight mass spectrometry (TOFMS) provides a gentle and general ionization scheme for measurement of the masses, and hence molecular formulae, of the components of a gas mixture, as long as these components have ionization potentials below the threshold for single-photon photoionization (118 nm = 10.5 eV in this case). By combining these two methods, a powerful tool is created for determining the structures of the components in a mixture. By following the correlation between the microwave transition intensities and the mass-resolved signals in the TOF mass spectrum, the molecular formulae of the carriers of the microwave transitions can be determined. In this sense, the combination of CP-FTMW with VUV TOFMS produces mass-correlated broadband microwave spectra. Herein, we discuss the design, construction and initial applications of a new chamber that was designed to acquire simultaneous mass and rotational spectra. Proof of concept will be demonstrated by examining a gaseous mixture of 2-methoxyfuran, furan and furfural. The new spectrometer is also being used to characterize resonance stabilized radicals formed by a pyrolysis source. Application in this context will also be discussed.
Issue Date:06/20/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100688
DOI:10.15278/isms.2018.WK01
Other Identifier(s):WK01
Date Available in IDEALS:2018-08-17
2018-12-12


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