Carbon-carbon Decoupling Reaction Rate Enhancement by Cation-pi Interaction of Cation-coordinated Graphitic Carbon Nitride
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Graphitic carbon nitride(g-C3N4) is the promising green material which can alternate molecular catalysts. Because the Ir, Ru-based molecular catalysts are expensive and harmful, replacement of them is meaningful. Moreover, by carbon-carbon decoupling reaction with g-C3N4, highly value-added products can be given from nature polymer, such as lignin. In this research, carbon-carbon decoupling reaction rate of lignin β-O-4 model is enhanced by maximizing adsorption. Additional adsorption is driven by strong cation-pi interaction between aromatic reactants and coordinated cations in g-C3N4 heptazine(tri-s-triazine) melon structure. Li, Na, K cations were doped and the reaction rate enhancement tendency was exhibited according to cation-pi interaction strength order. The reaction yield was measured by Gas chromatography, and catalysts were characterized with UV-vis spectroscopy, XRD and solid-state NMR.