화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.99, 380-387, July, 2021
DOI10.1016/j.jiec.2021.04.049  Export Citation
One-pot synthesis of 3D-ZIF-7 supported on 2D-Zn-Benzimidazole-Acetate and its catalytic activity in the methoxycarbonylation of aniline with dimethyl carbonate
Deliana Dahnum1, 2, Huyen Tran Dang1, 2, Ngoc Tuan Tran1, 2, Jeong-Myeong Ha1, 2, and Hyunjoo Lee1, 2, †
  • 1Clean Energy Research Center, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
  • 2Division of Energy & Environment Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
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For the first 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) was synthesized by reacting Zn(OAc)2 and benzimidazole in a one-pot reaction. By modulating the amount of diethylamine during the reaction, the ZIF-7/Zn(BeIM)OAc with a 1 to 1 molar ratio was obtained when the reactant molar ratio of Zn(OAc)2 and benzimidazole was 1 to 1.5. It was found that 3D-ZIF-7 was synthesized first 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 catalytic performance in the methoxycarbonylation of aniline with dimethyl carbonate. The yield of methyl N-phenyl carbamate reached 92.0% in 2 h at 190 °C, which was higher than yields obtained using the single component catalysts ZIF-7 (69.9%) and Zn(BeIM)OAc (35.4%). Furthermore, this catalyst was successfully reused four times, maintaining an MPC yield of 92.0%-95.8%.
Keywords:ZIF-7;Zn(BeIM)OAc;One-pot synthesis;Methoxycarbonylation
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