Infrared spectroscopy of chloromethyl radical in solid parahydrogen and its nuclear spin conversion

Yuki Miyamoto, Masaaki Tsubouchi, Takamasa Momose

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We present high-resolution infrared absorption spectra of chloromethyl radical produced by in situ UV photolysis of chloroiodomethane isolated in solid parahydrogen. The radicals were stable over a few days in solid parahydrogen kept at 3.6 K. Analysis of the rotation-vibration spectra revealed that the radical exhibited quantized one-dimensional rotational motion about the C-Cl bond, while the ortho and para nuclear spin species were still clearly distinguishable in the spectra. Temporal change of the spectra indicated that the nuclear spin conversion between the ortho and para nuclear spin species of the radical in solid parahydrogen occurred in a time scale of a few hours at 3.6 K. It was also found that the nuclear spin conversion became significantly slower in a higher concentration of chloroiodomethane.

Original languageEnglish
Pages (from-to)9510-9517
Number of pages8
JournalJournal of Physical Chemistry A
Volume117
Issue number39
DOIs
Publication statusPublished - Oct 3 2013

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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