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Deliana Dahnum,Huyen Tran Dang,Ngoc Tuan Tran,하정명,이현주 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.99 No.-
For thefirst time, three-dimensional Zeolitic Imidazole Framework (3D) ZIF-7 (Zn(BeIM)2, BeIM= benzimidazole) supported on two-dimensional (2D) Zn(BeIM)OAc (Zinc–Benzimidazole–Acetate) wassynthesized by reacting Zn(OAc)2 and benzimidazole in a one-pot reaction. By modulating the amount ofdiethylamine during the reaction, the ZIF-7/Zn(BeIM)OAc with a 1 to 1 molar ratio was obtained when thereactant molar ratio of Zn(OAc)2 and benzimidazole was 1 to 1.5. It was found that 3D-ZIF-7 wassynthesizedfirst and then transformed into 2D-Zn(BeIM)OAc by the reaction with remaining Zn(OAc)2. The synthesized ZIF-7 (Zn(BeIM)2) supported on Zn(BeIM)OAc (1/1) showed enhanced catalyticperformance in the methoxycarbonylation of aniline with dimethyl carbonate. The yield of methylN-phenyl carbamate reached 92.0% in 2 h at 190 C, which was higher than yields obtained using thesingle component catalysts ZIF-7 (69.9%) and Zn(BeIM)OAc (35.4%). Furthermore, this catalyst wassuccessfully reused four times, maintaining an MPC yield of 92.0%–95.8%.