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Octadecyltrichlorosilane

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Octadecyltrichlorosilane
Names
IUPAC name
n-Octadecyltrichlorosilane
Other names
Trichlorooctadecylsilane
Stearyltrichlorosilane
Identifiers
3D model (JSmol)
Abbreviations ODTS
ChemSpider
ECHA InfoCard 100.003.573 Edit this at Wikidata
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
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g. diesel fuelInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazards (white): no code
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).
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Octadecyltrichlorosilane (ODTS, or n-octadecyltrichlorosilane) is an organometallic 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 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.[2]

ODTS finds its use in molecular electronics, as thin insulating gates in Metal-Insulator-Semiconductor Field-Effect Transistors.[3]

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.[4]

References

  1. ^ [1]
  2. ^ "Beauty is Just One Layer: Introduction to Self Assembled Monolayers". Archived from the original on May 5, 2004.
  3. ^ http://www.ruhr-uni-bochum.de/pc1/deutsch/pub/131.htm[dead link]
  4. ^ XTECH, NIKKEI. "Sony Develops TFT Substrate Entirely Formed by Organic Materials". NIKKEI XTECH.
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