CAU-11-COOH with a V-Shaped Linker as a Catalyst for the Solvent-Free Synthesis of Cyclic Carbonates from CO₂ and Epoxides

Ga-Hyeong Kim; Jintu Francis Kurisingal; Yunjang Gu; Mi-Hye Lee; Youngson Choe; Dae-Won Park

doi:10.1166/jnn.2020.16910

CAU-11-COOH with a V-Shaped Linker as a Catalyst for the Solvent-Free Synthesis of Cyclic Carbonates from CO₂ and Epoxides

J Nanosci Nanotechnol. 2020 Feb 1;20(2):752-759. doi: 10.1166/jnn.2020.16910.

Authors

Ga-Hyeong Kim¹, Jintu Francis Kurisingal¹, Yunjang Gu¹, Mi-Hye Lee², Youngson Choe¹, Dae-Won Park¹

Affiliations

¹ School of Chemical and Biomolecular Engineering, Pusan National University, Busan 609-735, Korea.
² Brain Korea 21 Center of Chemical Engineering, Pusan National University, Busan 609-735, Korea.

PMID: 31383070
DOI: 10.1166/jnn.2020.16910

Abstract

An Al₃₊-based metal-organic framework (MOF), CAU-11-COOH, with a V-shaped ligand, DPSDA (3,3'-4,4'-diphenylsulfonetetracarboxylic dianhydride), was prepared using the solvothermal method, and was characterized using powder X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, elemental analysis, thermogravimetric analysis, Brunauer-Emmett-Teller analysis, and CO₂ adsorption. The catalytic efficiency of CAU-11-COOH was investigated in the solvent-free cycloaddition of carbon dioxide with epoxides, which yielded five-membered cyclic carbonates under mild reaction conditions. CAU-11-COOH with a co-catalyst, tetrabutylammonium bromide (TBAB), gave higher than 98% yield of epichlorohydrin carbonate at 80 °C without a solvent. A plausible reaction mechanism in which the Lewis acidic metal center, an uncoordinated carboxyl group, and a nucleophilic bromide anion operate synergistically is proposed. The CAU-11-COOH catalysts were found to exhibit high thermal stability and could be reused more than four times without any significant reduction in activity.

Publication types

Research Support, Non-U.S. Gov't