BROADBAND MICROWAVE SPECTROSCOPY OF TRANS 3-PENTENENITRILE AND ITS PYROLYSIS PRODUCTS

Mishra, Piyush

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https://hdl.handle.net/2142/104589 Copy

Description

Title

BROADBAND MICROWAVE SPECTROSCOPY OF TRANS 3-PENTENENITRILE AND ITS PYROLYSIS PRODUCTS

Author(s)

Mishra, Piyush

Contributor(s)

Zwier, Timothy S.; Hays, Brian M; Fritz, Sean

Issue Date

2019-06-19

Keyword(s)

Structure determination

Abstract

Titan, a moon of Saturn, has an atmosphere that is similar to prebiotic earth, which is nitrogen rich. Pentenenitriles are of importance as they are potential precursors to hetro-aromatic compounds like pyridine. This talk will describe our broadband microwave studies of \textit{trans} 3-pentenenitrile (\textit{t}-3PN) under jet-cooled conditions. Strong-field coherence breaking (SFCB) was used to selectively modulate the intensities of microwave transitions in a conformer-specific manner, aiding analysis. Two conformers of \textit{t}-3PN were identified and the rotational transitions were assigned. The talk will compare the conformational preferences of 3-pentenenitrile with its isomer, 4-pentenenitrile, previously studied in our laboratory. The studies of \textit{t}-3PN serve as a necessary foundation for subsequent studies of its pyrolysis over the 300K-850K temperature range, using a modified Chen nozzle followed by supersonic expansion. We combined CP-FTMW instrument with vacuum ultraviolet (VUV) time-of-flight mass spectrometry (TOF-MS) to obtain mass-correlated broadband microwave spectra. The temperature dependence of the mass spectra aid in identifying the carriers of new transitions appearing in the microwave spectrum. The thermal decomposition of t-3PN produces a range of products, including those that are both radical and molecular in nature.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/104589

DOI

10.15278/isms.2019.WI06

Copyright and License Information

Copyright 2019 Piyush Mishra

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