What are Organosilanes used for?
What are Organosilanes used for?
Organosilanes are widely used in the surface modification of finely dispersed organic and inorganic substances to produce materials used for liquid, gas, and affine chromatography; ion exchange technologies; and enzyme immobilization.
What does Organosilane mean?
Organosilane meaning (organic chemistry) Any organic derivative of a silane containing at least one carbon to silicon bond.
Are Organosilanes toxic?
Most attention has focused on organosilanes, compounds that do not have the toxicity associated with organotin reagents. Initially, the outlook was not promising because simple organosilanes are poor hydrogen-atom transfers when reacting with alkyl radicals and do not support chain reactions under normal conditions.
Is SiH polar?
The difference in electronegativity for both bonds is approximately 0.3, but the C-H bond is considered to be nonpolar covalent, while the Si-H bond is considered to be polar covalent. Because silicon is a larger atom than carbon, it will also have a larger electron cloud.
What is the systematic name of silane?
Silicon tetrahydride Silicon hydride
| Silane | |
|---|---|
| Systematic name | Silane |
| Other names | Silicon tetrahydride Silicon hydride Monosilane Silicane |
| Molecular formula | SiH4 |
| Molar mass | 32.12 g mol−1 |
How are silanes made?
Silanes have been prepared by the reaction of magnesium silicide (Mg2Si) with acids or by the reduction of silicon chlorides with lithium aluminum hydride. All the silanes burn or explode upon contact with air, and they are decomposed by alkaline solutions with formation of hydrogen and hydrous silica.
What are organosilanes made of?
Organosilanes are monomeric silicone-based chemicals, similar to hydrocarbons, which have at least one direct bond between a silicon atom and a carbon atom in the molecule (de Buyl, n.d.). The structure of a typical organosilane molecule is shown in Fig. 4.3a.
When was the first organosilicon compound prepared?
The first organosilicon compound, tetraethylsilane, was prepared by Charles Friedel and James Crafts in 1863 by reaction of tetrachlorosilane with diethylzinc . The bulk of organosilicon compounds derive from organosilicon chlorides (CH 3) 4-x SiCl x.
What is the structure of a typical organosilane molecule?
The structure of a typical organosilane molecule is shown in Fig. 4.3a. Organosilane monomers consist of an organic functional group and an inorganic functional group that are both attached to a silicon atom.
What are the organosilanes used for surface modification?
Organosilanes are examples of molecules used to form SAMs on a wide variety of hydroxylated surfaces. APTES is one of the most widely used organosilanes for surface modification as it is an economical and efficient method.
