Footprint Catalysis. IV. Structural Effects of Templates on Catalytic Behavior of Imprinted Footprint Cavities

摘要: Footprint catalysts are silica(alumina)gel with tailored specificities. Their catalytic sites “molecular footprint-like” cavities formed by a molecular imprinting procedure templates, which referred to as transition-state or reactive-intermediate analogs of the catalyzed reactions. To clarify relationship between structural feature template molecules and behavior, seven footprint were prepared templates several types closely related substrates, benzoic anhydride acetic anhydride; their activity thermodynamic parameters for 2,4-dinitrophenolysis then estimated. Among these catalysts, catalyst imprinted N,N′-dibenzoylbenzenephosphonediamide, tetrahedral intermediate analog substrate, showed 10-fold higher than did other catalysts.