Octadecyltrichlorosilane

Octadecyltrichlorosilane (ODTS or n-octadecyltrichlorosilane) is an organosilicon chemical. It is used in semiconductor industry to form self-assembled monolayer thin films on silicon dioxide substrates. Its structural chemical formula is CH3(CH2)17SiCl3. It is flammable, reacts with water, and is also sensitive to air. It is corrosive and can severely damage mucous membranes. Its EINECS number is 203-930-7.

Octadecyltrichlorosilane
Names
Preferred IUPAC name
Trichloro(octadecyl)silane
Other names
Trichlorooctadecylsilane
Stearyltrichlorosilane
Identifiers
3D model (JSmol)
Abbreviations ODTS
ChemSpider
ECHA InfoCard 100.003.573
EC Number
  • 203-930-7
UNII
  • InChI=1S/C18H37Cl3Si/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22(19,20)21/h2-18H2,1H3 N
    Key: PYJJCSYBSYXGQQ-UHFFFAOYSA-N N
  • InChI=1/C18H37Cl3Si/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22(19,20)21/h2-18H2,1H3
    Key: PYJJCSYBSYXGQQ-UHFFFAOYAA
  • CCCCCCCCCCCCCCCCCC[Si](Cl)(Cl)Cl
Properties
C18H37Cl3Si
Molar mass 387.93 g·mol−1
Appearance Colorless liquid
Density 0.984 g/mL, liquid
Boiling point 223 °C (433 °F; 496 K) at 10 Torr
Solubility soluble in ether, THF, THP, hydrocarbons, tetrachloroethylene[1]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 flammable, corrosive
GHS labelling:[2]
Danger
H314
P280, P305+P351+P338, P310
NFPA 704 (fire diamond)
3
2
2
Related compounds
Dodecyltrichlorosilane
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Octadecyltrichlorosilane is an amphiphilic molecule consisting of a long-chain alkyl group (C18H37–) and a polar head group (SiCl3–), which forms self assembled monolayers (SAMs) on various oxidic substrates.[3]

ODTS finds its use in molecular electronics, as thin insulating gates in metal-insulator-semiconductor field-effect transistors.[4]

Dodecyltrichlorosilane, an ODTS analog with shorter alkyl chain, is used for the same purpose as well.

ODTS-PVP films are used in organic-substrate LCD displays.[5]

References
  1. "Archived copy". www.chemical-reagent.com. Archived from the original on 15 June 2013. Retrieved 17 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)
  2. GHS: GESTIS 510649
  3. "Beauty is Just One Layer: Introduction to Self Assembled Monolayers". Archived from the original on May 5, 2004.
  4. http://www.ruhr-uni-bochum.de/pc1/deutsch/pub/131.htm%5B%5D
  5. XTECH, NIKKEI. "Sony Develops TFT Substrate Entirely Formed by Organic Materials". NIKKEI XTECH.
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