Graphene oxide was found to be a highly efficient, reusable and cost-effective organocatalyst for the aza-Michael addition of amines to activated alkenes to furnish corresponding β-amino compounds in excellent yields.

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Sulfonated graphitic carbon nitride (Sg-CN) is synthesized and deployed in the conversion of carbohydrates to furanics; enhanced acidity and stability of Sg-CN are exploited for converting carbohydrates to biologically important scaffolds and platform chemicals.

Sulfonation of graphitic carbon nitride (g-CN) affords a polar and strongly acidic catalyst, Sg-CN, which displays unprecedented reactivity and selectivity in biodiesel synthesis and esterification reactions at room temperature.