Extending the limits of rotationally resolved absorption spectroscopy: Pyrene

Brian E. Brumfield, Jacob T. Stewart, Benjamin J. McCall

Research output: Contribution to journalArticlepeer-review


We report the rotationally resolved gas phase spectrum of pyrene (C 16H 10), which is now the largest molecule to be observed with rotational resolution using absorption spectroscopy. This represents a significant advance in the application of absorption spectroscopy to large carbon-containing molecules of fundamental chemical and astronomical importance. Such spectra will facilitate the search for large and highly symmetric molecules in interstellar space, where they may be abundant but cannot be detected without the support of high-resolution laboratory spectra. Detailed assignment and analysis of our spectrum indicates that pyrene is the most rigid rotor yet observed, and that a supersonic expansion cools both the rotational and vibrational temperatures of pyrene vapor produced in an oven source.

Original languageEnglish (US)
Pages (from-to)1985-1988
Number of pages4
JournalJournal of Physical Chemistry Letters
Issue number15
StatePublished - Aug 2 2012

ASJC Scopus subject areas

  • General Materials Science
  • Physical and Theoretical Chemistry


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