Preparation of a thermosensitive cobalt phthalocyanine/N-isopropylacrylamide copolymer and its catalytic activity on thiol.
Preparation of a thermosensitive cobalt phthalocyanine/N-isopropylacrylamide copolymer and its catalytic activity on thiol.
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DOI：
10.1016/j.jcis.2006.04.008
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发表时间：
2006-08
影响因子：
9.9
通讯作者：
Wenxing Chen;Baoyan Zhao;Yong Pan;Yuyuan Yao;Shenshui Lu;Shiliang Chen;L. Du
中科院分区：
文献类型：
--
作者：
Wenxing Chen;Baoyan Zhao;Yong Pan;Yuyuan Yao;Shenshui Lu;Shiliang Chen;L. Du
采用水溶液氧化还原聚合法合成了四（N-丙烯酰羰基）氨基邻苯二甲酸钴（Co-TACAPc）与N-异丙基丙烯酰胺（NIPA）的温敏共聚物，并研究了其对2-巯基乙醇氧化反应的催化活性。用元素分析、IR、UV/维斯、TGA等方法对Co-TACAPc及其共聚物的产物进行了表征。该共聚物可以溶解在大多数溶剂中，特别是在宽pH范围内溶解在水中。该共聚物还显示出在32.6 °C下在水中的较低临界溶解温度（LCST）现象;即，它溶于冷水（低于32.6 °C），但不溶于热水（高于32.6 °C）。因此，与Co-TACAPc相反，该共聚物能够在低于31.0 °C的2-巯基乙醇氧化中充当均相催化剂，并且由于其在高于31.0 °C的较低溶解度而随着温度升高而回收。
A thermosensitive copolymer of cobalt tetra(N-acryliccarbonyl)aminophthalocyanine (Co-TACAPc) and N-isopropylacrylamide (NIPA) was prepared through redox polymerization in aqueous solution, and its catalytic activity for oxidation of 2-mercaptoethanol was investigated. The products of Co-TACAPc and its copolymer were characterized by elemental analysis, IR, UV/vis, and TGA. The copolymer can be dissolved into most solvents, particularly into water over a wide range of pH. The copolymer also revealed a lower critical solution temperature (LCST) phenomenon at 32.6 °C in water; i.e., it was soluble in cold water (below 32.6 °C) but insoluble in hot water (above 32.6 °C). As a result, in contrast to Co-TACAPc, the copolymer is able to serve as a homogeneous catalyst on oxidation of 2-mercaptoethanol below 31.0 °C and be recovered with increasing temperature due to its lower solubility above 31.0 °C.