离子交换树脂催化合成甲基丙烯酸异冰片酯

以莰烯和甲基丙烯酸为原料,强酸性阳离子交换树脂为催化剂合成甲基丙烯酸异冰片酯. 考察几种强酸性阳离子交换树脂（CT800,CT275,CT269和UPR65）的催化活性,并从催化剂的结构对实验结果进行分析. 结果表明,CT800阳离子交换树脂的离子交换容量和比表面积最大,整体催化性能最佳. 在最佳工艺条件下（反应温度47℃,搅拌速率500r·min^{-1,烯酸比1∶0.8,反应时间4h,催化剂用量为反应物总质量的10%）,甲基丙烯酸异冰片酯的收率可达83.15%,主反应选择性为97.95%. CT800阳离子交换树脂催化剂稳定性高,经多次重复使用,催化活性未见明显下降,且易于再生.}     

Synthesis and Theoretical Investigation of a New Hybrid Polymeric Iodoplumbate Based on Co-template： [（ipq）2（pea）（Pb3I9）·DMF]n

A new iodiplumbate polymer [（ipq）2（pea）（Pb3I9）-DMF]n 1 （ipq = N-（isopentyl）- quinolinium, pea = protonated ethylamine） was synthesized by self-assembly reaction of ipq·I, PbI2 with ethylamine and structurally characterized. 1 crystallizes in the triclinic system, space group P1 with α= 1.0731（4）, b = 1.2560（4）, c = 2.0785（7） nm, α = 96.378（5）, β= 91.132（2）, γ= 100.303（5）°, V= 2.7369（16） nm^3, Z= 2, Dc = 2.770 g/cm^3,μ = 14.307 mm^-1, F（000） = 2014, R = 0.0588 and wR = 0.1345. 1 features its hybrid structure concertedly templated by two kinds of organic cations, which exhibits interesting semiconductor property. In 1, the [Pb2I6]^2 n infinite chains shape the sketch of the title compound constructed from face-sharing of ideal and distorted PbI6 octahedra. Based on the crystal structure data, quantum chemistry calculation with DFT was used to reveal the electronic structure of 1.