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Investigation of time-dependent phenomena by use of step-scan FT-IR

Publication ,  Journal Article
Palmer, RA; Chao, JL; Dittmar, RM; Gregoriou, VG; Plunketf, SE
Published in: Applied Spectroscopy
December 1, 1993

The development, during the last decade, of modern step-scan interferometry instrumentation has allowed FT-IR to be applied to the study of time-dependent phenomena in ways not previously possible, because of the problems of uncoupling the spectral multiplexing from the temporal domain in the continuous-scan FT-IR mode. Specifically, the time regime from tens of nanoseconds to tens of milliseconds has been accessible to time-domain measurements to only a very limited degree with continuous- scan instrumentation and not at all for modulation-demodulation (frequency-domain) experiments in this time range. The step-scan technique not only works very well in this time regime and for slower phenomena, but is only prevented from application to faster processes by the signal strength, the speed of available detectors, the intensity of sources, and the speed and sophistication of the electronics. This paper surveys the various types of experiments which are either enhanced by use of step-scan FT-IR methods or are only possible by use of these techniques. The principles of step-scan instrumentation are reviewed, particularly those of retardation control, signal generation, and data acquisition, as well as the place of step-scan FT-IR relative to other techniques of dynamic vibrational spectroscopy. The importance of path difference (phase) modulation, particularly in frequency-domain measurements, the extraction and use of the signal phase, the creation of 2D FT-IR spectra, and the strategies for acquisition of both time- and frequency-domain data in the step-scan mode are discussed and illustrated. © 1993 Society for Applied Spectroscopy.

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Published In

Applied Spectroscopy

DOI

EISSN

1943-3530

ISSN

0003-7028

Publication Date

December 1, 1993

Volume

47

Issue

9

Start / End Page

1297 / 1310

Related Subject Headings

  • Analytical Chemistry
  • 0913 Mechanical Engineering
  • 0306 Physical Chemistry (incl. Structural)
  • 0301 Analytical Chemistry
 

Citation

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Palmer, R. A., Chao, J. L., Dittmar, R. M., Gregoriou, V. G., & Plunketf, S. E. (1993). Investigation of time-dependent phenomena by use of step-scan FT-IR. Applied Spectroscopy, 47(9), 1297–1310. https://doi.org/10.1366/0003702934067568
Palmer, R. A., J. L. Chao, R. M. Dittmar, V. G. Gregoriou, and S. E. Plunketf. “Investigation of time-dependent phenomena by use of step-scan FT-IR.” Applied Spectroscopy 47, no. 9 (December 1, 1993): 1297–1310. https://doi.org/10.1366/0003702934067568.
Palmer RA, Chao JL, Dittmar RM, Gregoriou VG, Plunketf SE. Investigation of time-dependent phenomena by use of step-scan FT-IR. Applied Spectroscopy. 1993 Dec 1;47(9):1297–310.
Palmer, R. A., et al. “Investigation of time-dependent phenomena by use of step-scan FT-IR.” Applied Spectroscopy, vol. 47, no. 9, Dec. 1993, pp. 1297–310. Scopus, doi:10.1366/0003702934067568.
Palmer RA, Chao JL, Dittmar RM, Gregoriou VG, Plunketf SE. Investigation of time-dependent phenomena by use of step-scan FT-IR. Applied Spectroscopy. 1993 Dec 1;47(9):1297–1310.
Journal cover image

Published In

Applied Spectroscopy

DOI

EISSN

1943-3530

ISSN

0003-7028

Publication Date

December 1, 1993

Volume

47

Issue

9

Start / End Page

1297 / 1310

Related Subject Headings

  • Analytical Chemistry
  • 0913 Mechanical Engineering
  • 0306 Physical Chemistry (incl. Structural)
  • 0301 Analytical Chemistry