Tannic Acid as a Polyphenol Material‐Assisted Synthesis of Cyclic Carbonates Using CO₂ as a Feedstock: Kinetic Characteristic and Mechanism Studies

Tannic acid (TA)/KI as a cheap, green, highly‐efficient, biocompatible, and recyclable catalytic system represents the excellent synergistic effect in the cycloaddition reactions of CO 2 and epoxides under solvent‐free conditions, which is originated from hydrogen bonding between the hydrogen atoms of phenolic hydroxyl groups within TA and the oxygen atom of the epoxide. Therefore, it is considerable to be a sustainable methodology for the utilization of bio‐resources.