Carbon-Containing Molecules Probed by Broadband Microwave Spectroscopy
Carbon in the Universe
Nicholas R. Walker
Newcastle University
J C Mullaney, C Medcraft, L Lewis-Borrell, N R Walker, B.T. Golding
Laser vaporisation of solid starting material is employed to generate and study a wide range of gas phase, carbon-containing molecules. These are stabilised and cooled within a supersonically-expanding pulse of gas prior to interrogation by microwave spectroscopy.1 Broadband microwave spectroscopy now permits the rapid acquisition of laboratory microwave spectra which assist and facilitate the identification of new molecules in interstellar and circumstellar environments. Microwave spectra of a series of carbon-containing molecules, of possible relevance in circumstellar/interstellar chemistry, will be presented. PtC3 and PdC3 can each be generated through the laser vaporisation of Pt/Pd in the presence of a wide range of hydrocarbons.2 Laser vaporisation of imidazole yields a wide variety of carbon-containing molecules such as HC7N generated through fragmentation and further reactions. Finally, results from a study of a complex formed between isocyanic acid and urea will be described.

1 D.P. Zaleski, S.L. Stephens and N.R. Walker, Phys. Chem. Chem. Phys. 2014, 16, 25221.2 D.M. Bittner, D.P. Zaleski, D.P. Tew, N.R. Walker and A.C. Legon, Angew. Chem. Int. Ed,


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