Deuterium isotope effects on the ultrafast solvent relaxation of formamide and n,n-dimethylformamide

Y. J. Chang, E. W. Castner

Research output: Contribution to journalArticle

95 Scopus citations

Abstract

We present the results of our study on the ultrafast solvent dynamics of the amides formamide (FA), N-dimethylformamide (DMF), and their deuterated analogs HCOND2 (d2-FA) and DCON(CD3)2 (d7-DMF) us femtosecond optical-heterodyne-detected Raman-induced Kerr effect spectroscopy (OHD-RIKES). As nearly transform-limited 50 fs optical pulses and the Fourier-transform relationship, we have studied liquid dynamics in the frequency range from 0.6 to 400 cm-1. In comparison to the depolarized Rayle spectroscopy technique. OHD-RIKES is shown to provide more accurate and detailed information about low-frequency region that includes the rotational reorientation, librational and collision-induced dynamic. The effect of deuterium isotope substitution on the inertial as well as diffusive reorientational dynamics these amide liquids is discussed.

Original languageEnglish (US)
Pages (from-to)9712-9722
Number of pages11
JournalJournal of physical chemistry
Volume98
Issue number39
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

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