Time-Resolved Spectroscopy Using Step-Scan Fourier Transform Interferometry

Palmer, Richard A.; Manning, Christopher J.; Rzepiela, Jeffrey A.; Widder, Jeffrey M.; Ji, Chao

doi:10.1366/0003702894203101

Cited by 57 publications

(19 citation statements)

References 17 publications

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“…Time-resolved step-scan Fourier transform infrared (FT-IR) spectroscopy has proven to be a powerful tool for the study of the m olecular mechanism of photochemical and photobiological reactions. Although it was initially regarded as a rather exotic technique, 1,2 as soon as manufacturers of FT-IR instrum ents could offer not only interferometers capable of step-wise positioning of the movable mirror but also software and complete packages to perform time-resolved infrared m easurements, it became a technique that promised quite general applicability.…”

Section: Introductionmentioning

confidence: 99%

Errors and Artifacts in Time-Resolved Step-Scan FT-IR Spectroscopy

Rödig

Siebert

1999

Appl Spectrosc

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Several sources of errors leading to distortions in time-resolved step-scan Fourier transform infrared (FT-IR) measurements are described, and their effect on difference spectra and time traces is discussed. Fluctuations of the movable interferometer mirror as well as interference of the power line frequency are shown to be able to cause oscillations in the time traces of absorbance changes obtained by step-scan measurements. It is demonstrated that absorbance changes of the sample and thermal IR signals due to heating of the sample by laser excitation both contribute to the IR intensity changes at a fixed sampling position. Therefore, intensity variations of the laser pulses used to drive the sample reaction can cause considerable fluctuations of the time-dependent IR signals and, thereby, introduce multiplicative noise into the difference spectra. Means to correct these errors are proposed for some cases.

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Section: Introductionmentioning

confidence: 99%

Errors and Artifacts in Time-Resolved Step-Scan FT-IR Spectroscopy

Rödig

Siebert

1999

Appl Spectrosc

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“…In step-scan interferometers, as shown schematically in Figure 2b, the mirror retardation is quickly changed to a desired value and held constant (14)(15)(16). After completing measurements at this mirror retardation, the interferometer is stepped rapidly to the next retardation.…”

Section: Step-scan Interferometermentioning

confidence: 99%

“…In this manner, the temporal evolution of signal from a transient molecular reorganization (∼10 ns time resolution) can be determined. This procedure forms the basis of timeresolved FTIR spectroscopy and has been widely employed over the past decade (15,16).…”

Section: Step-scan Interferometermentioning

confidence: 99%

FOURIER TRANSFORM INFRARED VIBRATIONAL SPECTROSCOPIC IMAGING: Integrating Microscopy and Molecular Recognition

Levin

Bhargava

2005

Annu. Rev. Phys. Chem.

273

203

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The recent development of Fourier transform infrared (FTIR) spectroscopic imaging has enhanced our capability to examine, on a microscopic scale, the spatial distribution of vibrational spectroscopic signatures of materials spanning the physical and biomedical disciplines. Recent activity in this emerging area has concentrated on instrumentation development, theoretical analyses to provide guidelines for imaging practice, novel data processing algorithms, and the introduction of the technique to new fields. To illustrate the impact and promise of this spectroscopic imaging methodology, we present fundamental principles of the technique in the context of FTIR spectroscopy and review new applications in various venues ranging from the physical chemistry of macromolecular systems to the detection of human disease.

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“…Infrared spectroscopy is well known as one of the simplest and most powerful techniques for studying the molecular response of a macroscopic sample subjected to an external periodic stimulus. A variety of infrared approaches, including step scan Fourier transform infrared (FT-IR) spectroscopy, 1 asynchronous FT-IR, 2 and single-channel dispersive IR, 3 have been employed to study systems under the influence of cyclic changes in pH, electric field, and tensile strain. These techniques suffer from the necessity of repeatedly perturbing the sample over hundreds or thousands of cycles to acquire one spectral data set.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Infrared Study of Polyphenylene Sulfide Using Planar Array Infrared Spectroscopy

et al. 2008

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Planar array infrared (PA-IR) spectroscopy was used to study polyphenylene sulfide (PPS) at room temperature during the application of a sinusoidal elastic deformation. All of the intensity in the dynamic spectra was contained within the in-phase spectrum, which was expected since the measurements were carried out at room temperature, far below the glass transition temperature. The contributions of chain orientation, sample thinning, and stress-induced band shifts were separated in the dynamic spectra. It was found that the effects of chain orientation and sample thinning canceled each other out. Stress-induced band shifts far below the spectral resolution, on the order of 0.01 cm(-1), were quantified and used to calculate the stress optical coefficients and mode Gruneisen parameters for PPS.

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Time-Resolved Spectroscopy Using Step-Scan Fourier Transform Interferometry

Cited by 57 publications

References 17 publications

Errors and Artifacts in Time-Resolved Step-Scan FT-IR Spectroscopy

Errors and Artifacts in Time-Resolved Step-Scan FT-IR Spectroscopy

FOURIER TRANSFORM INFRARED VIBRATIONAL SPECTROSCOPIC IMAGING: Integrating Microscopy and Molecular Recognition

Dynamic Infrared Study of Polyphenylene Sulfide Using Planar Array Infrared Spectroscopy

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