Dispersive spectrometer, time-resolved measurements using

Time-Resolved Measurements Using a Dispersive Infrared Spectrometer... 

TR in potential modulation experiments is limited to 10 -10 s by the response of the thin-layer cell and, in the case of ATR, to 10 s by the response of the electrochemical equipment, especially the potentiostat (0.5-10 p,s) [478] and the A/D converter [473] used. The first millisecond time-resolved IR spectra of an ultrathin film at the electrode-electrolyte interface were also measured with a dispersive spectrometer by repetitive measurements of IR absorption at fixed wavenumbers and conversion of the data into TR spectra [623]. The disadvantage of this technique was long collection times (on the order of a few tens of hours). 

Time resolved hole burning spectra were measured by means of a femtosecond transient absorption spectrometer system. A second harmonics of a mode locked cw Nd + YAG laser (Quantronix, 82MHz) was used for a pumping source. A synchronously pumped rhodamine 6G dye laser with a saturable absorber dye jet (DODCl/DQOCI) and dispersion compensating prisms in the cavity was used. The output of the dye laser (lOOfs fwhm, 600pJ/pulse) was... 

For microsecond to nanosecond time-resolved infrared absorption measurements, three types of spectroscopic methods have been developed (i) a method using an infrared laser, (ii) a method using a dispersive spectrometer, and (iii) a method using an FT-IR spectrometer. The time resolution of each of these is limited to the fastest time-response capability of the detector used. 

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