Cell design for picosecond time-resolved infrared spectroscopy in high-pressure liquids and supercritical fluids

Xue Zhong Sun, Peter Portius, David C. Grills, Alexander J. Cowan, Michael W. George

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The design of a new high-pressure infrared (IR) cell for carrying out picosecond time-resolved infrared (ps-TRIR) spectroscopy in supercritical fluids is described. We have employed thin (2 mm) MgF2 windows in order to overcome possible undesirable nonlinear optical effects caused by the extremely high peak powers of ultrashort ultraviolet (UV)/visible pulses. The design of our cell allows for the study of systems at pressures of up to 5500 psi at temperatures of up to approximately 50°C. The MgF2 windows enable the excitation of samples with both UV and visible light pulses and these windows are transparent across much of the midinfrared region. We have demonstrated the use of this cell by examining the photochemistry of Fe(CO) 5 in supercritical Kr (scKr).

Original languageEnglish
Pages (from-to)24-29
Number of pages6
JournalApplied Spectroscopy
Volume62
Issue number1
DOIs
Publication statusPublished - Jan 2008

Keywords

  • Organometallic chemistry
  • Picosecond time-resolved infrared spectroscopy
  • Spin-state changes
  • Super-critical fluids

ASJC Scopus subject areas

  • Instrumentation
  • Spectroscopy

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