CROSS-LINKED POLYSTYRENE RESINS WITH 2,6-DIFORMYLPYRIDINE BIS(2'-PYRIDYLHYDRAZONE) GROUPS - SYNTHESES AND METAL-ION CHELATION PROPERTIES

被引:19
作者
CHESSA, G
MARANGONI, G
PITTERI, B
机构
[1] Facoltà di Chimica Industriale, Dipartimento di Chimica, Università di Venezia, 30123 Venice
来源
REACTIVE POLYMERS | 1990年 / 12卷 / 03期
关键词
D O I
10.1016/0923-1137(90)90072-C
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Gel-type and macroporous chloromethylated poly(styrene-divinylbenzene) have been functionalized with 2,6-diformylpyridine bis(2′-pyridylhydrazone) groups. The synthetic route involved stepwise chemical modification of the polymer support. Polymer-bound 2,6-dimethoxycarbonylpyridine was converted to the diformyl derivative via a dihydroxymethyl intermediate, and condensation of the resin containing formyl groups with 2-hydrazinopyridine yielded the required chelating functionality. The entire sequence of reactions was also carried out in solution using 4-benzyloxy-2,6-dimethoxycarbonylpyridine as a model compound. The macroporous polystyrene-based resin exhibited a higher loading capacity for Cu(11) than the gel-type resin, the maximum capacity of the former being in the range 0.54-0.57 mmol/g. The resin proved to be stable under acid stripping conditions and showed a higher affinity for Cu(II) than for Co(II), Ni(II) or Zn(II). © 1990.
引用
收藏
页码:219 / 228
页数:10
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