title: Functional graphene by thiol-ene click chemistry.
abstract: Thiol-ene click reaction was successfully employed for chemical modification of graphene oxide (GO) by one-step synthesis. Herein, 2,2-azobis(2-methylpropionitrile) (AIBN) was used as thermal catalyst and cysteamine hydrochloride (HS-(CH2 )2 -NH2 HCl) was used as thiol-containing compound, which is incorporated to GO surface upon reaction with the C=C bonds. The hydrochloride acts as protecting group for the amine, which is finally eliminated by adding sodium hydroxide. The modified GO contains both S- and N-containing groups (NS-GO). We found that NS-GO sheets form good dispersion in water, ethanol, and ethylene glycol. These graphene dispersions can be processed into functionalized graphene film. Besides, it was demonstrated that NS-GO was proved to be an excellent host matrix for platinum nanoparticles. The developed method paves a new way for graphene modification and its functional nanocomposites.
authors.affiliation: Department of Biotechnology and Chemical Technology, Aalto University School of Chemical Technology, Espoo, P.O. Box 16100, I00076 Aalto (Finland).
authors.forename: Nguyen Dang
authors.initials: ND
authors.lastname: Luong
authors.forename: Le Hoang
authors.initials: le H
authors.lastname: Sinh
authors.forename: Leena-Sisko
authors.initials: LS
authors.lastname: Johansson
authors.forename: Joseph
authors.initials: J
authors.lastname: Campell
authors.forename: Jukka
authors.initials: J
authors.lastname: Seppälä
keywords: chemical modification; graphene; nanomaterials; platinum; thiol-ene reactions