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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Synthesis and catalytic activity of polymer supported schiff base complexes of copper(II) and iron(III) ions in comparison to unsupported complexes
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Synthesis and catalytic activity of polymer supported schiff base complexes of copper(II) and iron(III) ions in comparison to unsupported complexes

机译：聚合物负载的席夫碱铜（II）和铁（III）离子与未负载的配合物的合成及其催化活性

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The polymer supported metal complexes of N,N'-bis(acetyl acetone)o-phenylene-diamine (ACPDA) Schiff base were synthesized by suspension copolymerization of styrene and allyl chloride in the presence of divinyl benzene (DVB) as cross-linker and azobisisobutyronitrile (AIBN) as initiator at 70 +/- 0.1 degrees C and then ACPDA Schiff base and metal ions were loaded on the resulting polymer beads. The cross-linked density in polymer beads was varied by taking different concentrations of divinyl benzene in the reaction mixture. The polymer beads were characterized for their cross-linked density, size (phi), density (rho), degree of swelling (%S-w) and loading of ACPDA Schiff base and metal ions. The polymer beads prepared with 1.5 mmol of DVB (Type III) had a sufficient amount of allyl chloride (4.90 mmol, 0.367 g) and showed optimum loading for ACPDA Schiff base (1.96 mmol g(-1)) and metal ions. The structures of copper(II) and iron(III) ions complexes (ACPDA-M) and their loading on polymer beads (P-ACPDA-M) was characterized with spectral analysis. The catalytic activity of unsupported and polymer supported ACPDA Schiff base complexes of copper(II) and iron(III) ions was evaluated by studying the rate of decomposition of hydrogen peroxide. The rate of decomposition (Rp) of hydrogen peroxide varied linearly with a concentration of hydrogen peroxide and catalyst, but varied inversely with hydrogen ions concentration. Finally reaction steps for decomposition of H2O2 were proposed and a rate expression was derived considering the experimental data.
机译：N，N'-双（乙酰丙酮）邻苯二胺（ACPDA）Schiff碱的聚合物负载金属配合物是在二乙烯基苯（DVB）作为交联剂存在下通过苯乙烯和烯丙基氯的悬浮共聚反应合成的。在70 +/- 0.1摄氏度下，将偶氮二异丁腈（AIBN）作为引发剂，然后将ACPDA Schiff碱和金属离子负载在所得的聚合物微珠上。通过在反应混合物中采用不同浓度的二乙烯基苯来改变聚合物珠粒中的交联密度。表征聚合物珠粒的交联密度，大小（phi），密度（rho），溶胀度（％S-w）以及ACPDA Schiff碱和金属离子的负载量。用1.5 mmol DVB（III型）制备的聚合物珠具有足够量的烯丙基氯（4.90 mmol，0.367 g），并且显示出ACPDA Schiff碱（1.96 mmol g（-1））和金属离子的最佳负载量。通过光谱分析表征了铜（II）和铁（III）离子配合物（ACPDA-M）的结构及其在聚合物珠粒上的负载（P-ACPDA-M）。通过研究过氧化氢的分解速率评估了铜（II）和铁（III）离子的无载体和聚合物载体的ACPDA Schiff碱配合物的催化活性。过氧化氢的分解速率（Rp）与过氧化氢和催化剂的浓度成线性关系，但与氢离子浓度成反比。最后提出了分解H2O2的反应步骤，并结合实验数据推导了速率表达式。

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