Realtime observation of the desorption process of isobutene from zeolite using picosecond infrared lasers

Ken Onda, Akihide Wada, Kazunari Domen, Chiaki Hirose

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The transient absorption spectra of OD stretching mode of isobutene-adsorbed hydroxyl groups of DM20 zeolite were measured by picosecond infrared-infrared pump-probe experiment. The vibrational relaxation time (T1) of the ν = 1 state was estimated to be 12±2 ps from the temporal profile of the bleaching and hot bands of the OD stretching mode. We found a band indicating the production of a short-lived species at 40 ps after excitation. Moreover we observed the course of isobutene-desorption in the time region from 40 to 100 ps. This result implies that this desorption does not occur immediately but occurs after local vibrational relaxation.

Original languageEnglish
Pages (from-to)319-324
Number of pages6
JournalSurface Science
Volume502-503
DOIs
Publication statusPublished - Apr 10 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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