FTIR emission

Pibel C D, Sirota E, Brenner J and Dai H L 1998 Nanosecond time-resolved FTIR emission spectroscopy monitoring the energy distribution of highly vibrationally excited molecules during collisional deactivation J. Chem. Phys. 108 1297-300... 

Leone S R 1989 Time-resolved FTIR emission studies of molecular photofragmentation Accounts Chem. Res. 22 139-44... 

FTIR Emission Studies, Time Resolved, of Photochemical Reactions... 

The chapter is set out in the following way. Section II contains elements of the theory of Fourier transformations which, rather than being exhaustive (and exhausting), aims to cover the details and limitations of the technique which are of importance for the experimentalist to understand. Section III contains descriptions and comparisons of the SS and CS methods and outlines the advantages and pitfalls of each, together with recommendations for their suitability for specific applications. Section IV presents recent results from time-resolved FTIR emission experiments, emphasizing photochemical applications. 

III. A PRACTICAL GUIDE TO TIME-RESOLVED FTIR EMISSION STUDIES... 

Figure 1. Schematic diagram of the Michelson stop-scan interferometer used for time-resolved FTIR emission studies. Reproduced with permission from Ref. 38.

The following sections are not intended to give an exhaustive account of the application of time-resolved FTIR emission spectroscopy, but highlight particular problem areas in chemical physics to which the technique is particularly suited and focus on photochemical reactions, and results which have emerged since the previous reviews on the subject [26,27]. 

Figure 19, Emission spectra at 50, 200, and 500 fts following the IRMPD of CF2HC1 (24 mTorr) in the presence of O atoms (11.3 mTorr) and Ar (4.05 Torr), obtained from FTIR emission experiments. Data are unapodized with resolution (FWHM) 3.18cm 1, Nyquist wavenumber 3950cm-1, and were obtained at one C02 laser pulse per sampling point. The P, R envelope of the (0,0,1) - (0,0,0) transition of COz is clearly seen in the 500-/JS data. Reproduced with permission from Ref. 82.

Figure 25. FTIR emission spectra at two times following the IRMPE of 70njTorr PhNCO. Unapodized FWHM 3.18 cm 1, Nyquist wavenumber 3950.7 cm the spectrum is corrected for the instrument response function and the maxima of ot spectra have been scaled to unity.

This review has attempted to highlight recent progress in the development and use of time-resolved FTIR emission in three areas of chemical kinetics and dynamics, namely, product state distributions in photodissociation processes, product state distributions in chemical reactions, and rate processes involving the formation and loss of the internally excited species... 

---