scholarly journals Clean chlorination of silica surfaces by a single-site substitution approach

2018 ◽  
Vol 47 (12) ◽  
pp. 4301-4306 ◽  
Author(s):  
Niladri Maity ◽  
Samir Barman ◽  
Edy Abou-Hamad ◽  
Valerio D'Elia ◽  
Jean-Marie Basset
Keyword(s):  
Silica Surface ◽  
Single Site ◽  
Silanol Groups ◽  
Silica Surfaces ◽  
Selective Chlorination ◽  
Hydrogen Bonded

Unveiling a clean, selective chlorination method for the quantitative substitution of well-defined non-hydrogen bonded silanol groups of the silica surface.

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).

Surface Induced Hydrogen-Bonded Macrocluster Formation of Methanol on Silica Surfaces

Langmuir ◽  
2005 ◽  
Vol 21 (21) ◽  
pp. 9402-9405 ◽  
Author(s):  
Masashi Mizukami ◽  
Yasuhiro Nakagawa ◽  
Kazue Kurihara
Keyword(s):  
Silica Surfaces ◽  
Hydrogen Bonded

scholarly journals Peculiarities of Chemisorption of Dimethyl Carbonate on Silica Surface

2016 ◽  
Vol 17 (1) ◽  
pp. 88-92
Author(s):  
I.S. Protsak ◽  
E.M. Pakhlov ◽  
V.A. Tertykh
Keyword(s):  
Ir Spectroscopy ◽  
Fumed Silica ◽  
Dimethyl Carbonate ◽  
Silica Surface ◽  
Chemical Interaction ◽  
Spectroscopy Method ◽  
Silanol Groups

This paper presents the results of studies of dimethyl carbonate interaction with sites of the fumed silica surface. The investigations were performed in a vacuum quartz cuvette using IR spectroscopy method. Chemical interaction of dimethyl carbonate with sites of the dehydrated silica surface was shown to occur at temperature of 200 °C and higher, chemisorption processes take place involving both structural silanol groups and siloxane bridges on the surface.

Modelling the surface of amorphous dehydroxylated silica: the influence of the potential on the nature and density of defects

2018 ◽  
Vol 42 (2) ◽  
pp. 1356-1367 ◽  
Author(s):  
Stéphanie Halbert ◽  
Simona Ispas ◽  
Christophe Raynaud ◽  
Odile Eisenstein
Keyword(s):  
Molecular Dynamics ◽  
Silica Surface ◽  
Silanol Groups

The nature and density of defects on the amorphous dehydroxylated silica surface are studied by molecular dynamics for information on the silanol groups of pretreated silica.

Grafting Strategy to Develop Single Site Titanium on an Amorphous Silica Surface

Langmuir ◽  
2009 ◽  
Vol 25 (12) ◽  
pp. 7148-7155 ◽  
Author(s):  
M. C. Capel-Sanchez ◽  
G. Blanco-Brieva ◽  
J. M. Campos-Martin ◽  
M. P. de Frutos ◽  
W. Wen ◽  
...  
Keyword(s):  
Amorphous Silica ◽  
Silica Surface ◽  
Single Site

A method for introducing organic functional groups on silica surfaces using a functionalized vinylsilane containing polymer

2015 ◽  
Vol 6 (4) ◽  
pp. 555-560 ◽  
Author(s):  
Jung-Woo Park ◽  
Dong-Su Kim ◽  
Min-Seok Kim ◽  
Ji-Hwan Choi ◽  
Chul-Ho Jun
Keyword(s):  
Functional Groups ◽  
Silica Surface ◽  
New Method ◽  
Silica Surfaces ◽  
Organic Functional Groups

A new method for introducing robustly bound organic functional groups on the silica surface using a vinylsilane-containing polymer is developed.

Models for biomedical interfaces: a computational study of quinone-functionalized amorphous silica surface features

2017 ◽  
Vol 19 (11) ◽  
pp. 7793-7806 ◽  
Author(s):  
Marta Corno ◽  
Massimo Delle Piane ◽  
Patrick Choquet ◽  
Piero Ugliengo
Keyword(s):  
Amorphous Silica ◽  
Silica Surface ◽  
Computational Study ◽  
Antimicrobial Properties ◽  
Surface Features ◽  
Silica Surfaces

The structural and IR features of amorphous silica surfaces, functionalized by ortho-benzoquinone groups, were computed to obtain a deeper knowledge of multifunctional coatings with antimicrobial properties.

Interaction of trimethylchlorosilane with silanol groups silica surface in the presence of amines

1993 ◽  
Vol 50 (1-2) ◽  
pp. 305-310
Author(s):  
E. M. Pakhlov ◽  
V. M. Gun'ko ◽  
E. F. Voronin
Keyword(s):  
Silica Surface ◽  
Silanol Groups
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