采用对苯二酚、多缩乙二醇二氯化物为原料。合成了4个聚多缩乙二醇对苯二酚醚新单体,这些单体分别与甲醛和甲醛对苯二酚聚合,得到两个系列含多个氧化乙烯结构交联酚醛聚合物.这些聚合物含有假冠醚结构,对 K^+,Na^+配合容量在0.8～2.3 m ...采用对苯二酚、多缩乙二醇二氯化物为原料。合成了4个聚多缩乙二醇对苯二酚醚新单体,这些单体分别与甲醛和甲醛对苯二酚聚合,得到两个系列含多个氧化乙烯结构交联酚醛聚合物.这些聚合物含有假冠醚结构,对 K^+,Na^+配合容量在0.8～2.3 m mol·g^(-1)之间,可作为配合树脂使用,富集多种金属离子.展开更多
Phenolic polymers synthesized by reactions of p-benzoquinone with 15N-labelled protein or(15NH4)2SO4 were studied by using 15N CP-MAS NMR technique in combination with chemical approaches.Results showed that more than...Phenolic polymers synthesized by reactions of p-benzoquinone with 15N-labelled protein or(15NH4)2SO4 were studied by using 15N CP-MAS NMR technique in combination with chemical approaches.Results showed that more than 80% of nitrogen in quinone-protein polymers was in the form of amide with some present as aromatic and/or aliphatic alone and less than 10% of nitrogen occurred as heterocyclic N.The nitrogen distribution in the non-hydrolyzable residue of the quinone-protein polymers was basically similar to that of soil humic acid reported in literature with the exception that a higher proportion of N as heterocyclic N and aromatic amine and a lower proportion of N as amide and aliphatic amine were found in the former than in the latter. More than 70% of total nitrogen in quinones(NH4)2SO4 polymer was acid resist ant,of which about 53% occurred as pyrrole,nitrile and imino type N.The possible roles of the reactions of phenols or quinones with proteins in the formation of humic acid,especially the non-hydrolyzable nitrogen in humic acid,are discussed.展开更多
文摘采用对苯二酚、多缩乙二醇二氯化物为原料。合成了4个聚多缩乙二醇对苯二酚醚新单体,这些单体分别与甲醛和甲醛对苯二酚聚合,得到两个系列含多个氧化乙烯结构交联酚醛聚合物.这些聚合物含有假冠醚结构,对 K^+,Na^+配合容量在0.8～2.3 m mol·g^(-1)之间,可作为配合树脂使用,富集多种金属离子.
文摘Phenolic polymers synthesized by reactions of p-benzoquinone with 15N-labelled protein or(15NH4)2SO4 were studied by using 15N CP-MAS NMR technique in combination with chemical approaches.Results showed that more than 80% of nitrogen in quinone-protein polymers was in the form of amide with some present as aromatic and/or aliphatic alone and less than 10% of nitrogen occurred as heterocyclic N.The nitrogen distribution in the non-hydrolyzable residue of the quinone-protein polymers was basically similar to that of soil humic acid reported in literature with the exception that a higher proportion of N as heterocyclic N and aromatic amine and a lower proportion of N as amide and aliphatic amine were found in the former than in the latter. More than 70% of total nitrogen in quinones(NH4)2SO4 polymer was acid resist ant,of which about 53% occurred as pyrrole,nitrile and imino type N.The possible roles of the reactions of phenols or quinones with proteins in the formation of humic acid,especially the non-hydrolyzable nitrogen in humic acid,are discussed.
