Enhancement of Fourier transform infrared spectrometry by the flow-injection technique: Transmittance and internal total reflectance cell in a single-line system

1991 ◽  
Vol 2 (1) ◽  
pp. 1-14 ◽  
Author(s):  
M. Guzman ◽  
J. Ruzicka ◽  
G.D. Christian ◽  
P. Shelley
Keyword(s):  
Fourier Transform ◽  
Flow Injection ◽  
Fourier Transform Infrared ◽  
Single Line ◽  
Infrared Spectrometry ◽  
Injection Technique ◽  
Fourier Transform Infrared Spectrometry ◽  
Line System ◽  
Total Reflectance

Fourier Transform Infrared Spectrometry/Attenuated Total Reflectance Study of the Reaction of Pentanal and Propanal with 2-(Hydroxymethyl)Piperidine

1992 ◽  
Vol 46 (2) ◽  
pp. 266-272 ◽  
Author(s):  
Eugene R. Kennedy ◽  
Kevin Ashley
Keyword(s):  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Solution Phase ◽  
Attenuated Total Reflectance ◽  
Infrared Spectrometry ◽  
Fourier Transform Infrared Spectrometry ◽  
Total Reflectance ◽  
Solid Interface ◽  
Ft Ir ◽  
Flow Through

The reactions of propanal and pentanal with 2-(hydroxymethyl)piperidine were investigated by Fourier transform infrared spectrometry/attenuated total reflectance in both the solution phase and at the gas/solid interface. The reactions were studied with the use of a flow-through cylindrical internal reflection (“circle”) cell. Reaction intermediates were tentatively identified by their characteristic infrared absorption frequencies. At the gas/solid interface the reaction is thought to yield a hemiaminal intermediate. In the solution phase a hemiaminal intermediate is believed to form initially, followed by loss of water to generate an enamine product. In both gas-phase and solution-phase studies, an oxazolidine product is prepared only after an ultrasound treatment. The FT-IR/ATR technique reveals detailed mechanistic information concerning reactions between aldehydes and ethanol amines.

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