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Homogeneous rhodium ion catalyst encapsulated by benzoyl-terminated dendrimer: high hydrogenation and separation capabilities for diene copolymers

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Abstract

Benzoyl chloride has been employed to react with primary amino groups on the surface of the second generation of poly(propylene imine) (G2-PPI) dendrimer to synthesize benzoyl-terminated dendrimer (G2-B) by a nucleophilic substitution reaction. A novel homogeneous catalyst of G2-B(Rh3+) has been prepared by complexing RhCl3·3H2O with G2-B, and further applied to the catalytic hydrogenation of nitrile butadiene rubber (NBR) and styrene butadiene rubber (SBR). The hydrogenation degrees (HDs) of HNBR and HSBR catalyzed by G2-B(Rh3+) are 99.2 and 92.1% respectively. The contents of Rh residue in the HNBR and HSBR catalyzed by G2-B(Rh3+) are only 41 and 31 ppm, respectively, which are respectively decreased by 84.5 wt% and 83.2 wt%, respectively, compared to those catalyzed by RhCl(PPh3)3.

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Funding

The authors were financially supported by the National Natural Science Foundation of China (Grants 51273071 and 52003304).

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Authors and Affiliations

  1. Department of Science, Kunming University of Science and Technology, Kunming, People’s Republic of China

    Wei Zhou & Wenwen Qu

  2. Department of Materials Science and Engineering, South China University of Technology, Guangzhou, People’s Republic of China

    Wei Zhou & Xiaohong Peng

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  1. Wei Zhou
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  2. Wenwen Qu
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Correspondence to Wenwen Qu or Xiaohong Peng.

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Zhou, W., Qu, W. & Peng, X. Homogeneous rhodium ion catalyst encapsulated by benzoyl-terminated dendrimer: high hydrogenation and separation capabilities for diene copolymers. Colloid Polym Sci 299, 1587–1593 (2021). https://doi.org/10.1007/s00396-021-04862-1

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  • DOI: https://doi.org/10.1007/s00396-021-04862-1

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