Porphyrin counter anion in imidazolium-modified graphene-oxide

Investigation of double-layer and pseudocapacitance of surface-modified ionic liquid-functionalized graphene oxide

“…Covalently bonding ionic liquids to graphene oxide may enhance pseudocapacitance and increase the hybrid material's ability to store energy, in addition to the expected increase in double-layer capacitance due to modification of the graphene oxide surface. We follow a similar synthesis procedure as that proposed recently by Karousis and coworkers [37], although in contrast to their approach, we do not exchange the counterion of the hybrid material. Following their terminology, although the ionic liquid is no longer a liquid when attached to graphene oxide, we continue to say that the graphene oxide is functionalized with an ionic liquid to avoid confusion.…”

A novel sensing platform based on ionic liquid integrated carboxylic-functionalized graphene oxide nanosheets for honokiol determination

“…Using photoactive anionic porphyrin as counter anions towards the ionic liquid which was grafted onto graphene nanosheets through the noncovalent interactions of anion and/or cation, Karousis and coworkers [16] developed some optoelectronic devices. Recent studies [17,18] show that for a hydrophobic imidazolium based ionic liquid, the imidazolium ring slightly tilted to the surface plane, so that ionic liquid molecules can be orientated at the graphene surface.…”

Graphene oxide based solid acid as an efficient and reusable nano-catalyst for the green synthesis of diindolyl-oxindole derivatives in aqueous media

“…GO has attracted great attention due to its remarkable physical and chemical characteristics including high mechanical properties, large surface area and good thermal and electrical conductivity [2][3][4]. GO was synthesized by the Hummers method, which is based on the exhaustive oxidation of graphite using strong acid conditions by permanganate and hydrogen peroxide [5].…”