If excess reagent is used, the product will require flash chromatography to remove excess silanol and siloxane.
2.
When R = H, the Si-H group can undergo hydrosilylation or oxidation to the silanol.
3.
These films can be contaminated with significant carbon and hydrogen as silanol, and can be unstable in air.
4.
In chromatography, derivitization of accessible silanol groups in a bonded stationary phase with trimethylsilyl groups is referred to as endcapping.
5.
Once formed, the particles are treated with oleic acid, which is proposed to react with the surface silanol groups.
6.
Later, calcination leads to a condensation of the silanol groups so that the silicon atoms are bridged by oxygen atoms.
7.
Although the compound is stable in normal conditions, the presence of basic impurities can accelerate the condensation of the silanol groups.
8.
Piranha solution is used to make glass hydrophilic by hydroxylating the surface, thus increasing the number of silanol groups on the surface.
9.
The annealing therefore provides a certain amount of thermal energy which forces more silanol groups to react among each other and new, highly stable chemical bindings are formed.
10.
The increase of the bonding energy is based on the conversion of silanol-( Si-OH ) into siloxane-groups ( Si-O-Si ).
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