Macromolecular Ionophore II. Metal Cation-Binding Property of (1→6)-2,5-Anhydro-D-glucitol
Macromolecular Ionophore II. Metal Cation-Binding Property of (1→6)-2,5-Anhydro-D-glucitol
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(1→6)-2,5-脱水-D-葡萄糖醇的大分子离子载体II.金属阳离子结合特性
DOI：
10.1295/polymj.31.293
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发表时间：
1999
期刊：
影响因子：
2.8
通讯作者：
H. Kaga
中科院分区：
文献类型：
--
作者：
T. Kakuchi;Takeshi Hatakeyama;H. Kanai;T. Satoh;K. Yokota;K. Haraguchi;H. Kaga
研究了由3,4-二-O-甲基-D-葡萄糖醇单元、(1→6)-2,5-脱水-3,4-二-O-甲基-D-葡萄糖醇单元组成的聚合物1和由1,2:5,6-二酐0-3,4-O-异亚丙基-D-甘露醇聚合合成的环化单元摩尔分数为0.52的聚合物2的阳离子结合性能。聚合物1表现出的阳离子结合选择性顺序为K+>Rb+>Cs+>Na+>Li+，这是使用液液萃取和液膜传输方法估计的。另一方面，2 在萃取率和选择性方面都显示出极低的阳离子结合特性，并且 2 的 K+ 收率约为 10%。 1 的八分之一。需要大约。 21—25 左右1和2与K+的复合物中分别有200-400个重复单元。 1 的结合能力很大程度上取决于金属阳离子的半径，半径为 1.12 Å 及以下的阳离子（Mg2+、Li+、Ni2+、Co2+、Cu2+、Zn2+、Cd2+、Na+、Ca2+ 和 Sr2+）的萃取率相对较低，而半径为 1.20 Å 及以上的阳离子（Pb2+、Ag+、 K+、Ba2+、Rb+ 和 Cs+）。
The cation-binding property has been studied for polymer 1 consisting of 3,4-di-O-methyl-D-glucitol units, (1→6)-2,5-anhydro-3,4-di-O-methyl-D-glucitol, and polymer 2 with a mole fraction of cyclized units of 0.52 synthesized by the polymerization of 1,2:5,6-dianhydr0-3,4-O-isopropylidene-D-mannitol. Polymer 1 exhibited cation-binding selectivity in the order of K+>Rb+>Cs+>Na+>Li+, which was estimated using both liquid–liquid extraction and liquid-membrane transport methods. On the other hand, 2 showed an extremely low cation-binding characteristic in both extraction yield and selectivity, and the yield of K+ for 2 was ca. one-eighth of that for 1. There was a need for ca. 21—25 and ca. 200—400 repeating units in the complexes of 1 and 2 with K+, respectively. The binding ability of 1 strongly depended on the radius of the metal cations, and the extraction yields were relatively low for a cation with a radius of 1.12 Å and below (Mg2+, Li+, Ni2+, Co2+, Cu2+, Zn2+, Cd2+, Na+, Ca2+, and Sr2+) and high for a cation with a radius of 1.20 Å and above (Pb2+, Ag+, K+, Ba2+ Rb+, and Cs+).