Probing organometallic reactions by time-resolved infrared spectroscopy in solution and in the solid state using quantum cascade lasers

James A. Calladine, Raphael Horvath, Andrew J. Davies, Alisdair Wriglesworth, Xue Zhong Sun, Michael W. George

Research output: Journal PublicationReview articlepeer-review

11 Citations (Scopus)

Abstract

The photochemistry and photophysics of metal carbonyl compounds (W(CO)6, Cp∗Rh(CO)2 (Cp∗= η5-C5Me5), and fac-[Re(CO)3(4,4′-bpy)2Br] [bpy = bipyridine]) have been examined on the nanosecond timescale using a time-resolved infrared spectrometer with an external cavity quantum cascade laser (QCL) as the infrared source. We show the photochemistry of W(CO)6 in alkane solution is easily monitored, and very sensitive measurements are possible with this approach, meaning it can monitor small transients with absorbance changes less than 10-6 ΔOD. The C-H activation of Cp∗Rh(CO)(C6H12) to form Cp∗Rh(CO)(C6H11)H occurs within the first few tens of nanoseconds following photolysis, and we demonstrate that kinetics obtained following deconvolution are in excellent agreement with those measured using an ultrafast laser-based spectrometer. We also show that the high flux and tunability of QCLs makes them suited for solid-state and time-resolved measurements.

Original languageEnglish
Pages (from-to)519-524
Number of pages6
JournalApplied Spectroscopy
Volume69
Issue number5
DOIs
Publication statusPublished - 1 May 2015

Keywords

  • Infrared
  • Photochemistry
  • QCL
  • Quantum cascade laser
  • TRIR
  • Time-resolved

ASJC Scopus subject areas

  • Instrumentation
  • Spectroscopy

Fingerprint

Dive into the research topics of 'Probing organometallic reactions by time-resolved infrared spectroscopy in solution and in the solid state using quantum cascade lasers'. Together they form a unique fingerprint.

Cite this