Jump to content



Recommended Posts

I'm trying to make gold nanoshells and had an idea, but am unsure as to whether gold would be able to undergo oxidative insertion to add between a Si-Cl bond.


My idea was to take silica nanospheres, react with oxalyl or thionyl chloride to turn the hydroxyls (on the outside of the SiO2) into chlorides and then have the gold insert to form Si-Au-Cl. Furthermore I was wondering as to whether a reducing solution of HAuCl4 and NaBH4 would continue to add gold to form Si-Au-Au-Cl, Si-Au-Au-Au-Cl, etc.


The most obvious problem with this is that I can't think of too many divalent gold compounds. Apparently the oxidation state exists, but is only existent in "rare complexes." The only one I know of is [AuXe4]+2 but that is unstable and at +2 already. Are there any that are either at ground state or +1?


Also a possibility would be a +1 gold salt such as AuCl, but I'm not sure that it would insert well.


Also, does anyone here have any thoughts on my proposal?

Link to comment
Share on other sites

Interesting idea. I think thatif you maded SiCl bonds they would hydrolyse as soon as you took the stuff into suspension in water.

It would be interesting to reduce a gold salt in the presence of some nanoparticulate silica and see if the Au "plated" out onto the surface. I think that converting the "SiOH" to "SiSH" might help. Not sure about that but peopele seem to use thiols for putting monolayers onto gold electrodes (and I'm not sure how you would do it anyway).

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.