title: Immobilization of a rhodium catalyst using a diphosphine-functionalized ionic liquid in RTIL for the efficient and recyclable biphasic hydroformylation of 1-octene.
abstract: A highly efficient and stable Rh-P catalytic system in the RTIL of [PEmim]BF4 was developed for the biphasic hydroformylation of 1-octene by using the diphosphine-functionalized ionic liquid (FIL) of 2. While 2-Rh(acac)(CO)2 was immobilized in [PEmim]BF4 (solvent), a typical biphasic catalysis was fulfilled with advantages of facile separation and recycling ability - 9 runs without any loss of activity. It was found that not only the acquired π-acceptor character of 2, but also the synergetic role of the piperidyl group in [PEmim]BF4 as an N-containing donor, cooperatively contributed to the efficient hydroformylation due to the facilitated formation and stability of the Rh-H active species (ν 2045 cm(-1)). This was supported by the in situ high-pressure FT-IR spectral analysis.
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China. yliu@chem.ecnu.edu.cn.
authors.forename: Yong-Qi
authors.initials: YQ
authors.lastname: Li
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China. yliu@chem.ecnu.edu.cn.
authors.forename: Huan
authors.initials: H
authors.lastname: Liu
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China. yliu@chem.ecnu.edu.cn.
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China. yliu@chem.ecnu.edu.cn.
authors.forename: Da
authors.initials: D
authors.lastname: Yang
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China. yliu@chem.ecnu.edu.cn.
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Zhao
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China. yliu@chem.ecnu.edu.cn.
authors.forename: Ye
authors.initials: Y
authors.lastname: Liu