用于阴离子识别的二茂铁基偶氮苯化合物的合成（英文）

目的:研究二茂铁基偶氮苯化合物的光电响应性能及离子识别性能,并研究取代基对其离子识别性能的影响。创新点:考察取代基对于二茂铁基偶氮苯化合物的影响,并提出可能的机理。方法:循环伏安(CV)法和紫外可见吸收光谱(UV-vis)法。结论:通过CV法和UV-vis法研究二茂铁基偶氮苯化合物的离子识别性能,发现硝基取代的化合物对于F^-和H_2PO_4^-具有选择性离子识别作用,而氨基取代的化合物则识别作用不明显。

Surface pattern based on an azobenzene-containing copolymer thin film and its light-driven morphology modulation

A type of azobenzene-containing block copolymer polymethyl methacrylate-b-poly (n-butylmethacrylate-co-6-(4-(phenylazo) benzoate) hexyl methacrylate) (PMMA-b-(PnBMA-co-PAzoMA)) was synthesized by the atom transfer radical polymerization (ATRP). Macroinitiator polymethyl methacrylate (PMMA) was prepared by ATRP and used to initiate the copolymerization of monomer n-butyl methacrylate (nBMA) and azobenzene-based methacrylate monomer (AzoMA). Herein, three block copolymers with different molecular weights and block volume fractions were obtained and spin-coated on a silicon substrate or quartz plate before annealing at 180℃ for 14 h. The surface morphologies in these annealed copolymer films were observed by atomic force microscopy (AFM). Bicontinuous stripe or island patterns with different sizes were formed dependent on the film thickness. These ordered patterns are considered to be formed arising from the dewetting process of the surface layer in the copolymer film. Photoisomerization of azobenzene units in the copolymer films changed the dewetting behaviors of the surface layer of the thin film. Therefore, some copolymer annealed films showed a reversible morphology conversion between bicontinuous stripe and island structure when exposed to UV light and upon being stored in the dark. It was found that the composition of the block copolymer had obvious influences on the photoinduced morphology conversion behaviors in these copolymer thin films. When the volumes of PnBMA and PAzoMA phases in the block copolymer were large enough, the surface morphology could be modulated by UV light irradiation and storage in the dark. This work proposes a new possibility for photoinduced control and design of the dewetting processes of thin films using a linear block copolymer.

磁性多孔四氧化三铁/聚(甲基丙烯酸甲酯-co-二乙烯基苯)微球的制备、表征及其去除罗丹明B的应用研究（英文）

目的:通过悬浮聚合法合成含有Fe3O4磁性核的多孔聚合物微球,研究不同单体比例、致孔剂类型及用量对所合成磁性微球的形貌影响以发现最佳反应条件,最终将所合成的磁性多孔微球应用于从水溶液中去除阳离子染料罗丹明B,并证明成功。方法:1.通过改进的悬浮聚合法合成了磁性多孔四氧化三铁/聚(甲基丙烯酸甲酯-co-二乙烯基苯);2.通过红外及能谱表征产物的组成,使用扫描电镜及透射电镜表征产物的表面及内部形貌,通过热失重分析表征产物的聚合物包覆率,通过X射线粉末衍射表征产物的晶型,使用压汞法表征产物的多孔性及孔结构,利用超导量子干涉仪测定产物的磁性能;3.通过紫外分光光度法验证产物对于罗丹明B的吸附及其效果。结论:1.通过改进的悬浮聚合法成功合成磁性多孔四氧化三铁/聚(甲基丙烯酸甲酯-co-二乙烯基苯);2.表面聚合物的包覆并不影响四氧化三铁的晶型;3.产物的形貌及孔结构受到单体甲基丙烯酸甲酯与致孔剂二乙烯基苯的比例、致孔剂类型及用量等多方面影响;4.所合成的产物对于罗丹明B有很好的吸附效果,同时具有很好的重复利用性;5.所合成的聚合物在废水中重金属的去除、酶固定化、药物的靶向释放及生物分离等方面都有潜在应用价值。