Solid supported gold nanoparticles, methods of use thereof, and methods for making same
Solid-supported gold nanoparticles for use as a catalyst for the synthesis of quinolines from anilines and aldehydes using oxygen as an oxidant are provided. Also provided are a method for the preparation of SiO 2 -supported gold nanoparticles by in situ deposition of gold nanoparticles to silica gel and a method for synthesizing quinolines from anilines and aldehydes using oxygen as an oxidant.
1. A catalyst composition, comprising:
gold nanoparticles on a silica gel support, wherein gold loading on silica gel is from 0.001mmol/g to 100 mmol/g; and
the gold nanoparticles have a monodispersity in the silica gel from 1% to 40%.
2. A catalyst composition according to claim 1 , wherein the gold nanoparticles have an average size from about 1 nm to 100 nm.
3. A catalyst composition according to claim 1 , wherein the gold nanoparticles have an average size from about 5 nm to 75 nm.
4. A catalyst composition according to claim 1 , wherein the gold loading on silica gel is from 0.01 mmol/g to 10 mmol/g.
5. A catalyst composition according to claim 1 , wherein the gold nanoparticles have a monodispersity in the silica gel from 2% to 30%.
6. A catalyst composition according to claim 1 , wherein the gold nanoparticles have a monodispersity in the silica gel from 5% to 20%.
7. A catalyst composition according to claim 1 , further having an average particle size from 5 nm to 1 micron.
8. A catalyst composition according to claim 1 , further having an average particle size from 10 nm to 0.5 micron.