title: Bifunctional organic polymeric catalysts with a tunable acid-base distance and framework flexibility.
abstract: Acid-base bifunctional organic polymeric catalysts were synthesized with tunable structures. we demonstrated two synthesis approaches for structural fine-tune. In the first case, the framework flexibility was tuned by changing the ratio of rigid blocks to flexible blocks within the polymer framework. In the second case, we precisely adjusted the acid-base distance by distributing basic monomers to be adjacent to acidic monomers, and by changing the chain length of acidic monomers. In a standard test reaction for the aldol condensation of 4-nitrobenzaldehyde with acetone, the catalysts showed good reusability upon recycling and maintained relatively high conversion percentage.
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Huanhui
authors.initials: H
authors.lastname: Chen
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Yanan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Qunlong
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Junhui
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Shiqi
authors.initials: S
authors.lastname: Yang
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Zhirong
authors.initials: Z
authors.lastname: Zhu