Determination of Surface Coverage and Orientation of Reduced Cytochromecon a Silica Surface with Polarized ATR Spectroscopy

2007 ◽  
Vol 111 (35) ◽  
pp. 13062-13067 ◽  
Author(s):  
Casey M. Kraning ◽  
Tara L. Benz ◽  
Kayla S. Bloome ◽  
Gregory C. Campanello ◽  
Victoria S. Fahrenbach ◽  
...  
Keyword(s):  
Surface Coverage ◽  
Silica Surface ◽  
Atr Spectroscopy

The determination of the surface area of silica by laser Raman spectroscopy

1976 ◽  
Vol 29 (3) ◽  
pp. 507 ◽  
Author(s):  
RP Cooney ◽  
NT Tam
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectrum ◽  
Surface Area ◽  
Surface Coverage ◽  
Silica Surface ◽  
Quantitative Agreement ◽  
Laser Raman Spectroscopy ◽  
Laser Raman ◽  
Bet Method

Changes in the Raman spectrum of pyridine on a silica surface with increasing surface coverage may be used to determine the monolayer capacity. The method, which is independent of the BET method, produces a result which is in quantitative agreement with the BET result.

scholarly journals Luminescence Determination of Copper(I), Silver(I), Gold(I), and Platinum(II) Using 2-Mercapto-5-Benzimidazolesulfonic Acid, also Immobilized on a Silica Surface

2018 ◽  
Vol 73 (1) ◽  
pp. 50-57 ◽  
Author(s):  
V. N. Losev ◽  
S. I. Metelitsa ◽  
S. L. Didukh ◽  
A. I. Kashkevich ◽  
A. K. Trofimchuk ◽  
...  
Keyword(s):  
Silica Surface ◽  
Determination Of Copper

Determination of the Orientation of Silanes on Silica Surfaces by Fourier Transform Infrared Photoacoustic Spectroscopy

1986 ◽  
Vol 40 (4) ◽  
pp. 513-519 ◽  
Author(s):  
Marek W. Urban ◽  
Jack L. Koenig
Keyword(s):  
Fourier Transform ◽  
Photoacoustic Spectroscopy ◽  
Surface Coverage ◽  
Silica Surface ◽  
Fourier Transform Infrared ◽  
Coupling Agents ◽  
Surface Hydroxyl ◽  
Silica Surfaces ◽  
Quantitative Surface Analysis ◽  
Infrared Photoacoustic Spectroscopy

Fourier transform infrared photoacoustic spectroscopy has been used for quantitative surface analysis of silica treated with trifunctional coupling agents such as γ-Methacryloxypropyltriethoxysilane (γ-MPS), γ-Glycidoxypropyltrimethoxysilane (γ-GPS), and γ-Aminopropyltri-ethoxysilane (γ-APS). The calibration curves are obtained for several characteristic bands of the coupling agents. Using a highly polarizable gas in the photoacoustic cell and comparing the spectra with a nonpolarizable coupling gas, it is possible to evaluate orientation of the coupling agents on the silica surface. The type of orientation is a function of the extent of surface coverage. At low surface coverage, coupling agents tend to take a perpendicular orientation with respect to the surface, and increasing surface coverage leads to parallel orientation. Increasing the coupling agent concentration also causes orientational changes of the species which form chemical bonds with the silica surface (hydroxyl, water, and carbonyl groups).

Determination of the Orientation of Adsorbed Pyridine and γ-MPS on Alumina Surface by Photoacoustic FT-IR Spectroscopy

1986 ◽  
Vol 40 (6) ◽  
pp. 851-856 ◽  
Author(s):  
Marek W. Urban ◽  
Jack L. Koenig
Keyword(s):  
Surface Coverage ◽  
Hydroxyl Groups ◽  
Alumina Surface ◽  
Surface Hydroxyl ◽  
Adsorbed Pyridine ◽  
Ft Ir ◽  
Infrared Photoacoustic Spectroscopy ◽  
Pyridinium Ion ◽  
Ft Ir Spectroscopy

Fourier transform infrared photoacoustic spectroscopy has been applied to determine the structure and orientation of pyridine and γ-Metacryl-oxypropyltriethoxysilane (γ-MPS) on γ-Al2O3 surface. Adsorption of pyridine on activated γ-Al2O3 leads to formation of a pyridinium ion (pyN+-H) and pyridine N-oxide. The orientation of pyridinium ion on the alumina surface is random, whereas the pyridine N-oxide is parallel with respect to the surface. The adsorption of oligomers of γ-MPS gives parallel layers on the alumina surface. At low γ-MPS surface coverage, the carbonyl groups interact with the surface hydroxyl groups. Increasing surface coverage leads to an excess of the free C=O species.

scholarly journals Determination of Polymerization Degree of Maltooligosaccharides by FT-IR/ATR Spectroscopy.

2001 ◽  
Vol 48 (6) ◽  
pp. 401-408 ◽  
Author(s):  
Mikihito KANOU ◽  
Atsushi HASHIMOTO ◽  
Yasuhiko SHIINOKI ◽  
Kensuke ITO ◽  
Yoshitaka MOTONAGA ◽  
...  
Keyword(s):  
Polymerization Degree ◽  
Ft Ir ◽  
Atr Spectroscopy

Determination of the secondary structure of proteins in different environments by FTIR-ATR spectroscopy and PLS regression

Biopolymers ◽  
2008 ◽  
Vol 89 (11) ◽  
pp. 895-905 ◽  
Author(s):  
Yeqiu Wang ◽  
Reinhard I. Boysen ◽  
Bayden R. Wood ◽  
Mustafa Kansiz ◽  
Don McNaughton ◽  
...  
Keyword(s):  
Secondary Structure ◽  
Pls Regression ◽  
Atr Spectroscopy ◽  
Secondary Structure Of Proteins ◽  
Structure Of Proteins
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