A trinuclear [Zn-3(L)(2)(OAc)(2)] complex based on the asymmetrical bis-Schiff-base ligand H2L for ring-opening copolymerization of CHO and MA

作者：Zhu Luqun; Liu Dengfeng; Wu Liying; Feng Weixu; Zhang Xingmei; Wu Jing; Fan Daidi; Lu Xingqiang^*; Lu Rong; Shi Qi

来源：Inorganic Chemistry Communications, 2013, 37: 182-185.

DOI：10.1016/j.inoche.2013.09.059

• Trinuclear Zn2+ complex
• Asymmetrical bis-Schiff-base ligand
• Ring-opening copolymerization from CHO and MA
• Polyester and poly(ester-co-ether)

Based on asymmetrical bis-Schiff-base ligand H2L from o-vanillin and the half-unit Schiff-base precursor HL synthesized from 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) and o-phenylenediamine, a trinuclear [Zn-3(L)(2)(OAc)(2)] (1) is obtained. In complex 1, the unsaturated five and four-coordinate coordination environment for the catalytic active centers (Zn2+ ions) permits the monomer insertion for the effective bulk or solution copolymerization of CHO (cyclohexene oxide) and MA (maleic anhydride) in the presence of co-catalyst of DMAP (4-(dimethylamino)pyridine), TPP (triphenylphosphine) or n-Bu4NBr. All the bulk copolymerizations afford poly( ester-co-ether)s, while some of the solution copolymerizations produce perfectly alternating polyester copolymers. Of the three co-catalysts, DMAP is found to be the most efficient, while an excess thereof is detrimental for chain growth of the copolymers.

• 出版日期2013-11
• 单位西北大学