由合成的含偶氮苯的两亲性手性salen Ti IV构建具有紫外线(UV)控制形态的自组装金属硅化物催化剂。通过改变紫外线照射时间可以很好地调节金属硅化物的形态,这通过TEM分析得到了证实。紫外线引起的形态变化可能会实时调节催化剂浓度和/或可及性,从而可实现光控制水中不对称硫氧化的催化作用。在大范围的金属硅烷基团上,对于宽范围的烷基芳基硫化物都观察到了具有出色选择性的紫外线响应催化活性。此外,催化剂中的热响应性NIPAAm嵌段可通过热控分离使其轻松回收,以实现稳定的再利用。这项工作构建了一个光响应的金属硅化物体系,以可控的方式进行金属硅化物催化。
Self-assembled metallomicelles with ultraviolet (UV)-controlled morphologies were constructed from a synthesized azobenzene-containing amphiphilic chiral salen TiIV catalyst. The morphologies of the metallomicelles could be well adjusted by changing the UV irradiation time, and this was confirmed by TEM analyses. The UV-induced change in morphology potentially adjusted the catalyst concentration and/or
由合成的含偶氮苯的两亲性手性salen Ti IV构建具有紫外线(UV)控制形态的自组装金属硅化物催化剂。通过改变紫外线照射时间可以很好地调节金属硅化物的形态,这通过TEM分析得到了证实。紫外线引起的形态变化可能会实时调节催化剂浓度和/或可及性,从而可实现光控制水中不对称硫氧化的催化作用。在大范围的金属硅烷基团上,对于宽范围的烷基芳基硫化物都观察到了具有出色选择性的紫外线响应催化活性。此外,催化剂中的热响应性NIPAAm嵌段可通过热控分离使其轻松回收,以实现稳定的再利用。这项工作构建了一个光响应的金属硅化物体系,以可控的方式进行金属硅化物催化。
Preparation of Azobenzene-Containing Polymer Membranes That Function in Photoregulated Molecular Recognition
Selective, stable, molecularly imprinted polymers having intrinsic photoresponsive properties were synthesized for the purpose of photoregulated binding of a predetermined ligand. Highly crosslinked, free-standing polymer membranes were synthesized from an optimized mixture of two cross-linkers-ethylene glycol dimethacrylate and tetraethylene glycol diacrylate. For synthesizing molecularly imprinted polymers, p-phenylazoacrylanilide (PhAAAn) was used as a new photoresponsive functional monomer. A study of the kinetics of photoisomerization of PhAAAn within the polymer membranes before and after treatment with various media showed the excellent functional stability of the membranes. Polymer membranes synthesized in the presence of the template dansylamide possess selective sites for recognizing dansylamide, and the affinity of these sites can be reversibly changed by illumination with ultraviolet or visible light.