a.Key Laboratory of Polymer Ecomaterial, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.University of Science and Technology of China, Hefei 230026, China
Yu-Sheng Qin, E-mail ysqin@ciac.ac.cn
Xian-Hong Wang, E-mail xhwang@ciac.ac.cn
收稿:2017-11-06,
录用:2017-11-15,
网络首发:2017-11-29,
纸质出版:2018-02-05
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Chun-Wei Zhuo, Yu-Sheng Qin, Xian-Hong Wang, 等. Steric Hindrance Ligand Strategy to Aluminum Porphyrin Catalyst for Completely Alternative Copolymerization of CO2 and Propylene Oxide[J]. Chinese Journal of Polymer Science, 2018,36(2):252-260. DOI: 10.1007/s10118-018-2093-z.
Chun-Wei Zhuo, Yu-Sheng Qin, Xian-Hong Wang, et al. Steric Hindrance Ligand Strategy to Aluminum Porphyrin Catalyst for Completely Alternative Copolymerization of CO2 and Propylene Oxide[J]. Chinese Journal of Polymer Science, 2018, 36(2): 252-260. DOI: 10.1007/s10118-018-2093-z.
Chun-Wei Zhuo, Yu-Sheng Qin, Xian-Hong Wang, 等. Steric Hindrance Ligand Strategy to Aluminum Porphyrin Catalyst for Completely Alternative Copolymerization of CO2 and Propylene Oxide[J]. Chinese Journal of Polymer Science, 2018,36(2):252-260. DOI: 10.1007/s10118-018-2093-z. DOI:
Chun-Wei Zhuo, Yu-Sheng Qin, Xian-Hong Wang, et al. Steric Hindrance Ligand Strategy to Aluminum Porphyrin Catalyst for Completely Alternative Copolymerization of CO2 and Propylene Oxide[J]. Chinese Journal of Polymer Science, 2018, 36(2): 252-260. DOI: 10.1007/s10118-018-2093-z. DOI:
Aluminum porphyrin complexes are heavy-metal-free and soil-tolerant green catalysts for the copolymerization of CO
2
and propylene oxide (PO)
but they suffer from relatively poor poly(propylene carbonate) (PPC) selectivity. Herein
steric hindrance porphyrin ligand was used to enhance the PPC selectivity. Typically
a bulky anthracene-like group was incorporated into the porphyrin ring to form 5
10
15
20-tetra(1
2
3
4
5
6
7
8-octahydro-1
4:5
8-dimethanoanthracen-9-yl) porphyrin
the aluminum porphyrin complex with this ligand
in combination with bis(triphenylphosphine) iminium chloride as a co-catalyst
produced completely alternate PPC. Additionally
the obtained PPC showed high regioselectivity
with a head-to-tail linkage content (HT) of 92%. Therefore
we demonstrated that introduction of bulky steric ligand into the porphyrin ring could reduce the propylene oxide homopolymerization activity leading to excellent PPC selectivity
and improve regioselectivity for the PO ring-opening during the copolymerization.
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