Octadecyltrimethoxysilane
"OTMS" redirects here. For scheme to keep older cattle out of the human food chain, see Over Thirty Months Scheme.
![]() | |
Names | |
---|---|
Preferred IUPAC name
Octadecyltrimethoxysilane | |
Systematic IUPAC name
Trimethoxy(octadecyl)silane | |
Other names
n-Octadecyltrimethoxysilane Trimethoxyoctadecylsilane | |
Identifiers | |
3069-42-9 ![]() | |
3D model (Jmol) | Interactive image Interactive image |
Abbreviations | OTMS |
5791830 | |
ChemSpider | 68956 ![]() |
ECHA InfoCard | 100.019.400 |
EC Number | 221-339-2 |
MeSH | n-Octadecyltrimethoxysilane |
PubChem | 76486 |
| |
| |
Properties | |
C21H46O3Si | |
Molar mass | 374.68 g·mol−1 |
Appearance | Colorless liquid |
Density | 0.883 g cm−3 |
Melting point | 16 to 17 °C (61 to 63 °F; 289 to 290 K) |
Boiling point | 170 °C (338 °F; 443 K) |
Refractive index (nD) |
1.438-1.44 |
Hazards | |
Safety data sheet | |
EU classification (DSD) |
![]() |
R-phrases | R36, R37, R38 |
S-phrases | S26, S36 |
NFPA 704 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
Octadecyltrimethoxysilane is an organosilicon compound, commonly called OTMS. This colourless liquid is used for preparing hydrophobic coatings and self-assembled monolayers. It is sensitive toward water, irreversibly degrading to a siloxane polymer.[1] It places a C18H39SiO3 "cap" on oxide surfaces. The formation of OTMS monolayers is used for converting hydrophilic surfaces to hydrophobic surfaces, e.g. for use in certain areas of nanotechnology and analytical chemistry.
References
- ↑ P. Fontaine and F. Rondelez, Kinetics of Polymerisation in Langmuir Monolayers of n-Alkyltrimethoxysilane, Short and Long Chains at Interfaces, Edited by: J. Daillant, P. Guenoun, C. Marques, P. Muller, J. Tran Thanh Van. 1995.
Further reading (specialized articles)
- R. Hild, C. David, H. U. Müller, B. Völkel, D. R. Kayser, and M. Grunze. Formation and Characterization of Self-assembled Monolayers of Octadecyltrimethoxysilane on Chromium: Application in Low-Energy Electron Lithography", Langmuir, 1998, 14 (2), pp 342–346.
- Vidon, S., Leblanc, Langmuir study of octadecyltrimethoxysilane behavior at the air-water interface, Journal of Physical Chemistry B, 1998.
This article is issued from Wikipedia - version of the 6/23/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.