Fourier-transform infrared spectra of organic compounds in solution and as thin layers obtained by using an attenuated total internal reflectance fiber-optic cell

1988 ◽  
Vol 60 (18) ◽  
pp. 1908-1910 ◽  
Author(s):  
Shimon. Simhony ◽  
Abraham. Katzir ◽  
Edward M. Kosower
Keyword(s):  
Fourier Transform ◽  
Organic Compounds ◽  
Infrared Spectra ◽  
Fiber Optic ◽  
Fourier Transform Infrared ◽  
Thin Layers ◽  
Fourier Transform Infrared Spectra ◽  
Total Internal Reflectance ◽  
Internal Reflectance

Some Applications of Fourier Transform Infrared Photoacoustic Spectroscopy

1981 ◽  
Vol 35 (6) ◽  
pp. 549-557 ◽  
Author(s):  
K. Krishnan
Keyword(s):  
Fourier Transform ◽  
Infrared Spectra ◽  
Diffuse Reflectance ◽  
High Sensitivity ◽  
Fourier Transform Infrared ◽  
Chemical Systems ◽  
Infrared Photoacoustic Spectroscopy ◽  
Saturation Effects ◽  
Total Internal Reflectance ◽  
Internal Reflectance

A new photoacoustic cell for use with Fourier transform infrared spectrometers is detailed. Photoacoustic infrared spectra showing high sensitivity on a variety of chemical systems are presented. Comparison of the photoacoustic infrared spectra with transmission and attenuated total internal reflectance spectra show that saturation effects can play a prominent role in the photoacoustic spectra. Spectral subtractions and study of the situ chemical reactions are possible using the photoacoustic technique. The photoacoustic and diffuse reflectance techniques yield very similar spectra.

Examinations of the Matrix Isolation Fourier Transform Infrared Spectra of Organic Compounds: Part VIII

1988 ◽  
Vol 42 (2) ◽  
pp. 304-309 ◽  
Author(s):  
W. M. Coleman ◽  
Bert M. Gordon
Keyword(s):  
Fourier Transform ◽  
Organic Compounds ◽  
Vapor Phase ◽  
Infrared Spectra ◽  
Matrix Isolation ◽  
Fourier Transform Infrared ◽  
Argon Matrix ◽  
Fourier Transform Infrared Spectra ◽  
The Matrix ◽  
Ft Ir

Matrix isolation Fourier transform infrared (MI/FT-IR) data has been presented that documents the presence of discrete conformers in an argon matrix for a series of ketones. The distribution of conformers in the matrix was related to the structure of the molecule, in that rigid structures (i.e., small rings, bicyclic systems, and unsaturated systems) displayed simple carbonyl absorption patterns relative to those of their less rigid counterparts. Also, conformer isolation was seen for halosubstituted ketones. These results are in agreement with previous findings concerning the vapor-phase (VP) spectra of these molecules.

Synthesis, characterization, and their some chemical and biological properties of PVA/PAA/nPS hydrogel nanocomposites: Hydrogel and wound dressing

2020 ◽  
Vol 35 (3) ◽  
pp. 203-215
Author(s):  
Mehmet Emin Diken ◽  
Berna Koçer Kizilduman ◽  
Begümhan Yilmaz Kardaş ◽  
Enes Emre Doğan ◽  
Mehmet Doğan ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Acrylic Acid ◽  
Infrared Spectra ◽  
Vinyl Alcohol ◽  
Fourier Transform Infrared ◽  
Poly Vinyl Alcohol ◽  
Seed Particles ◽  
Fourier Transform Infrared Spectra ◽  
Hydrogel Nanocomposites ◽  
Poly Acrylic Acid

The nanocomposite hydrogels were prepared by dispersing of the nanopomegranate seed particles into poly(vinyl alcohol)/poly(acrylic acid) blend matrix in an aqueous medium by the solvent casting method. These hydrogels were characterized using scanning electron microscopy, Fourier transform infrared spectra, differential scanning calorimetry, and optical contact angle instruments. The nanopomegranate seed, blend, and hydrogel nanocomposites were tested for microbial activity. In addition, cytocompatibilities of these blend and hydrogel nanocomposites/composites were tested on human lymphocyte with in vitro MTS cell viability assays. Fourier transform infrared spectra revealed that esterification reaction took place among functional groups in the structure of poly(vinyl alcohol) and poly(acrylic acid). The hydrophilic properties of all hydrogels decreased with increasing nanopomegranate seed content. The mean diameters of the nanopomegranate seed particles were about 88 nm. Nanopomegranate seed particles demonstrated antibacterial properties against gram-positive bacteria, Staphylococcus aureus, and gram-negative bacteria, Escherichia coli. The lymphocyte viabilities increased after addition of nanopomegranate seeds into the polymer blend. The swelling behavior of blend and hydrogels was dependent on the cross-linking density created by the reaction between poly(vinyl alcohol)/poly(acrylic acid) blend and nanopomegranate seed. Scanning electron microscopy images were highly consistent with Fourier transform infrared spectra, differential scanning calorimetry, and antibacterial activity results.

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