Design of thermoresponsive poly(ionic liquid) gels containing proline units to catalyse aldol reaction in water
Design of thermoresponsive poly(ionic liquid) gels containing proline units to catalyse aldol reaction in water
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DOI：
10.1016/j.polymer.2017.11.047
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发表时间：
2018-01
期刊：
影响因子：
4.6
通讯作者：
A. Okafuji;Y. Kohno;N. Nakamura;H. Ohno
中科院分区：
文献类型：
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作者：
A. Okafuji;Y. Kohno;N. Nakamura;H. Ohno
离子液体单体和含脯氨酸单体在交联剂存在下共聚，形成离子液体聚合物凝胶，该凝胶在水中表现出较低临界溶液温度型相变。所得凝胶用作水中羟醛反应的催化剂。由于脯氨酸催化的羟醛反应由脱水缩合反应和水解反应三个平衡步骤组成，因此产物的收率受到凝胶中脯氨酸单元周围的水含量的影响。由于由此制备的离子液体聚合物凝胶表现出水含量的热响应变化，因此发现产物产率受到相变温度附近的温度的影响。
Ionic liquid monomers and a proline-containing monomer were copolymerised in the presence of cross-linker to form ionic liquid polymer gels that show lower critical solution temperature-type phase change in water. The obtained gels were utilised as catalysts for aldol reaction in water. Since proline-catalysed aldol reaction is composed of three equilibrium steps including dehydration condensation reaction and hydrolysis reaction, yield of product was affected by the water content around the proline unit in the gel. Since thus prepared ionic liquid polymer gels showed the thermo-responsive change in water content, the product yield was found to be affected by the temperature around the phase transition temperature.