Cube-octameric silsesquioxane-mediated cargo copper Schiff base for efficient click reaction in aqueous media

• Copper(II)—polyhedral oligomeric silsesquioxane (POSS)—bridged Schiff base was synthesized.
• Excellent yield has been achieved.
• Recoverability and reusability of catalyst was studied.

The azide–alkyne cycloaddition reaction was investigated under catalytic conditions involving a copper(II)—polyhedral oligomeric silsesquioxane (POSS)—bridged Schiff base. This material demonstrated a high catalytic activity in organic synthesis of 1,4-triazoles. No additive such as a base or a reductant was required. Finally, recoverability and reusability of the POSS-bridged Schiff base–Cu(II) catalyst was analyzed.

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