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Ring-opening copolymerization of cyclohexene oxide and maleic anhydride catalyzed by mononuclear [Zn(L)(H2O)] or binuclear [Zn2(L)(OAc)2(H2O)] complex based on the Salen-type Schiff-base ligand

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Abstract

From the self-assembly of the typical Salen-type Schiff-base ligand H 2 L and Zn(OAc)2·2H2O in the molar ratio of 1:1 or 1:2, the mononuclear [Zn(L)(H2O)] (1) or binuclear [Zn2(L)(OAc)2(H2O)] (2) are obtained, respectively. For both complexes 1 and 2, the unsaturated five-coordinate coordination environment to the catalytic active centers (Zn2+ ions) permits the monomer insertion for the effective solution copolymerization of cyclohexene oxide and maleic anhydride. All the solution copolymerizations afford poly(ester-co-ether)s, while lower catalyst and co-catalyst concentrations are helpful for the formation of alternating polyester. Of the three co-catalysts, 4-(dimethylamino)pyridine is found to be the most efficient, while an excess thereof is detrimental for chain growth of the copolymers.

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Authors and Affiliations

  1. Shaanxi Key Laboratory of Degradable Medical Material, Northwest University, Xi’an, 710069, China

    Li-ying Wu, Dai-di Fan, Xing-qiang Lü  (吕兴强) & Rong Lu  (卢荣)

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  1. Li-ying Wu
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  2. Dai-di Fan
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  3. Xing-qiang Lü  (吕兴强)
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  4. Rong Lu  (卢荣)
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Corresponding authors

Correspondence to Xing-qiang Lü  (吕兴强) or Rong Lu  (卢荣).

Additional information

This work was financially supported by the National Natural Science Foundation of China (Nos. 91222201, 21173165 and 20871098), the Program for New Century Excellent Talents in Universities from the Ministry of Education of China (No. NCET-10-0936), the State Key Laboratory of Structure Chemistry (20100014), the Provincial Natural Foundation (2011JQ2011) of Shaanxi, the Education Committee Foundation of Shaanxi Province (11JK0588, 12JK0577), Graduate Innovation and Creativity Fund (YZZ12038) of Northwest University and Hong Kong Research Grants Council (HKBU 202407 and FRG/06-07/II-16).

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Wu, Ly., Fan, Dd., Lü, Xq. et al. Ring-opening copolymerization of cyclohexene oxide and maleic anhydride catalyzed by mononuclear [Zn(L)(H2O)] or binuclear [Zn2(L)(OAc)2(H2O)] complex based on the Salen-type Schiff-base ligand. Chin J Polym Sci 32, 768–777 (2014). https://doi.org/10.1007/s10118-014-1425-x

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  • DOI: https://doi.org/10.1007/s10118-014-1425-x

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