Synthesis of imidazole-terminated hyperbranched polymers with POSS-branching points and their pH responsive and coordination properties
Synthesis of imidazole-terminated hyperbranched polymers with POSS-branching points and their pH responsive and coordination properties
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DOI：
10.1002/pola.26664
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发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
Yasuyuki Irie;K. Naka
中科院分区：
文献类型：
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作者：
Yasuyuki Irie;K. Naka
将过量的三（2-氨基乙基）胺与第一代甲基酯端端POSS核心聚（氨基胺）型枝状大分子聚合，与丙烯酸甲酯反应，与3-氨基丙基咪唑交换反应，制备了具有八官能团POSS分支单元的咪唑端超支化聚合物POSS- hypam - im。以甲基酯端部超支化聚脒胺为原料，通过酯-酰胺交换反应，以1-（3-氨基丙基）咪唑为原料合成了端部咪唑超支化聚脒胺（HYPAM-Im）。当溶液pH大于8.2时，POSS-HYPAM-Im溶液的透过率急剧下降。另一方面，当溶液pH为8.5且大于9时，HYPAM-Im溶液的透过率逐渐降低。用分光光度法滴定了含Cu2+离子的超支化聚合物水溶液，结果表明POSS-HYPAM-Im的配位模式从Cu2+ -N4络合物转变为Cu2+ -N2O2络合物，并且随着浓度的增加，Cu2+离子与HYPAM-Im之间存在唯一的Cu2+ -N4络合模式。©2013 Wiley期刊公司j .变异较大。科学。A部分：Polym。化学，2013,51,2695-2701
An imidazole-terminated hyperbranched polymer with octafunctional POSS branching units denoted as POSS-HYPAM-Im was prepared by the polymerization of excess amounts of tris(2-aminoethyl)amine with the first-generation methyl ester-terminated POSS-core poly(amidoamine)-typed dendrimer, reacting with methyl acrylate, and ester-amide exchange reaction with 3-aminopropylimidazole. The imidazole-terminated hyperbranched poly(amidoamine) denoted as HYPAM-Im was also synthesized with 1-(3-aminopropyl)imidazole from a methyl ester-terminated hyperbranched poly(amidoamine) by the ester-amide exchange reaction. The transmittance of the POSS-HYPAM-Im solution drastically decreased when the solution pH was greater than 8.2. On the other hand, the transmittance of the HYPAM-Im solution gradually decreased when the solution pH at 8.5 and was greater than 9. Spectrophotometric titrations of the hyperbranched polymer aqueous solutions with Cu2+ ions indicated the variation of the coordination modes of POSS-HYPAM-Im from the Cu2+–N4 complex to the Cu2+–N2O2 complex and the existence of the only one complexation mode of Cu2+–N4 between Cu2+ ion and HYPAM-Im with increasing the concentrations. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 2695–2701