Application Of Step-Scan Interferometry To Dynamic Infrared Spectroscopy

Palmer, Richard A.; Manning, Christopher J.; Rzepiela, Jeffrey A.; Widder, Jeffrey M.; Thomas, Paula J.; Ji, Chao; Marcott, Curtis; Noda, Isao

doi:10.1117/12.969460

Cited by 9 publications

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“…Palmer and Marcott , have demonstrated the use of a step-scanning interferometer for acquisition of dynamic dichroic difference spectra of isotactic polypropylene. Photoacoustic/photothermal depth-profiling applications of step-scan FT-IR continue to increase, − and Palmer and Toriumi 14,15 reported the effects of electric field perturbations on the orientation of liquid crystals using step-scan interferometry. These applications have demonstrated that step-scan interferometry is useful in the characterization of dynamic repeatable or reversible processes.…”

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Step-Scan FT-IR Spectroelectrochemical Analysis of Surface and Solution Species in the Ferricyanide/Ferrocyanide Redox Couple

and

Griffiths

1997

Anal. Chem.

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Fourier transform infrared (FT-IR) spectrometry adds complementary structural information to sensitive electroanalytical measurements. In this work, in situ, external reflection FT-IR techniques allowed for examination of interfacial electrochemical events through a thin-layer spectroelectrochemical cell in which a sinusoidally modulated potential was applied to the electrode. The infrared spectra of electrochemically modulated species were measured by a step-scan FT-IR spectrometer. The phasesensitive detection capability of this technique has been used to provide information about dynamic electrode processes and to enhance sensitivity to surface species. The cause of decreases in the heterogeneous rate constant, k°, of the ferricyanide/ferrocyanide redox process with time has been investigated. Previous authors offer a variety of opinions for the variation of k°for this reaction including the adsorption of polymeric hexacyanoferrate complexes, ferrocyanide, or ferricyanide on the electrode surface; other reports indicate that no species adsorb on the electrode during the electron-transfer process. Our results indicate that, with KCl as electrolyte, a hexacyanoferrate complex can form during potential cycling in the ferri-/ferrocyanide redox couple, but only under rather extreme experimental parameters. Measurements made by electrochemical modulation combined with step-scan FT-IR spectrometry show that, under other conditions, the change in rate constant of this redox process can be attributed to the adsorption of ferrocyanide ion.

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confidence: 99%

Step-Scan FT-IR Spectroelectrochemical Analysis of Surface and Solution Species in the Ferricyanide/Ferrocyanide Redox Couple

and

Griffiths

1997

Anal. Chem.

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Characterization of biological samples by two-dimensional infrared spectroscopy: Simulation of frequency, bandwidth, and intensity changes

et al. 1998

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Dynamic Infrared Linear Dichroism Spectroscopy

Marcott

Noda

2001

Handbook of Vibrational Spectroscopy

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The sections in this article are Introduction IR Linear Dichroism and Molecular Orientations Dichroic Parameters Classical Theory of Linear Dichroism and Molecular Orientation Limitation of the Classical Theory Dynamic Mechanical Analysis DMA and Viscoelasticity Mechanical Spectra Dynamic Infrared Linear Dichroism Spectroscopy Combination of IR Dichroism and DMA DIRLD Spectra Wavenumber Dependence of β(ν) Instrumentation General Considerations for Dynamic IR Spectrometers Dispersive Dynamic IR Spectrometer Mechanical and Thermal Components Optical Components Signal Demodulation, Data Acquisition, and Processing Fourier Transform Dynamic IR Spectrometer Dispersive vs Interferometric Instrumentation Rapid‐Scanning FT ‐ IR Spectrometer Step‐Scanning FT ‐ IR Spectrometer Examples of DIRLD Measurements Measurements with a Dispersive Spectrometer Measurements with a Fourier Transform Spectrometer Experimental Procedure Conclusions

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Application Of Step-Scan Interferometry To Dynamic Infrared Spectroscopy

Cited by 9 publications

References 0 publications

Step-Scan FT-IR Spectroelectrochemical Analysis of Surface and Solution Species in the Ferricyanide/Ferrocyanide Redox Couple

Step-Scan FT-IR Spectroelectrochemical Analysis of Surface and Solution Species in the Ferricyanide/Ferrocyanide Redox Couple

Characterization of biological samples by two-dimensional infrared spectroscopy: Simulation of frequency, bandwidth, and intensity changes

Dynamic Infrared Linear Dichroism Spectroscopy

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