Synthesis of Photodimerizable Poly(crown ether)s and Their Application

1.制备了具有冠醚部分作为阳离子结合位点和肉桂酰基部分作为可光二聚基团的聚合物。发现光反应聚合物的阳离子结合能力高于原始聚合物。研究了聚合物的光二聚化程度和模板剂阳离子的种类对聚合物光二聚化的影响.制备了具有不同尺寸冠醚和肉桂酰基单元的聚合物。一个显着的1：2络合物形成的碱金属阳离子与两个不同大小的冠醚单元在侧链的聚合物被证实。聚合物的碱金属阳离子结合能力和选择性明显不同于相同环尺寸冠醚单元的聚合物的组合所预期的那些。聚合物的光二聚作用在不改变阳离子选择性的情况下增强了其阳离子结合能力.制备了具有非环状聚醚（苯并二甘醇二甲醚）和肉桂酰基单元的聚合物。乙二醇二甲醚单元链长的增加增强了阳离子的结合能力，长的乙二醇二甲醚单元优先于大的阳离子的结合。虽然聚合物的阳离子结合能力和选择性低于相应的环状聚醚（冠醚）聚合物，但它们通过肉桂酰基单元的光二聚得到了很大的改善.在以光二聚冠醚为固定相、水为移动的流动相的离子色谱中，实现了碱金属阳离子和卤阴离子的分离。

1. Polymers having both crown ether moieties as cation binding sites and cinnamoyl moieties as photodimerizable groups were prepared. The cation binding ability of the photoreacted polymers was found to be higher than that of original polymers. The effects of the degree of photodimerization of the polymers and of the kind of cations used as a template during photodimerization of the polymers were studied.2. Polymers which have different sized crown ethers and cinnamoyl units were prepared. A significant 1:2 complex formation of alkali metal cations with two different sized crown ether units in the side chain of the polymers was confirmed. The alkali metal cation binding ability and selectivity of the polymers were markedly different from those expected from the combination of polymers of same ring-size crown ether units. The photodimerization of the polymers enhanced their cation binding ability without change in the cation selectivity.3. Polymers with both non-cyclic polyethers (benzodiglymes) and cinnamoyl units were prepared. The increase in the chain length of glyme units enhanced the binding ability of cations and the long oxyethylene units were preferable to the binding of large cations. Although the cation binding ability and selectivity of the polymers were lower than those of polymers bearing corresponding cyclic polyethers (crown ethers), they were much improved by the photodimerization of the cinnamoyl units.4. In the ion chromatography using silica gels coated with the photodimerizable poly(crown ether)s as stationary phase and water as mobile phase, the separation of alkali metal cations and halide anions was accomplished.