pH Control on the Sequential Uptake and Release of Organic Cations by Cucurbit[7]uril
作者:Lukas Mikulu、Romana Michalicova、Vivian Iglesias、Mirza A. Yawer、Angel E. Kaifer、Premysl Lubal、Vladimir Sindelar
DOI:10.1002/chem.201604417
日期:2017.2.16
macrocycle with the ability to form the most stable supramolecular complexes in water ever reported for an artificial receptor. Its use for the design of advanced functional materials is, however, very limited because there is no example of a fully reversible CB7 based supramolecular complex enabling repetitious dissociation/association controlled by external stimuli. We report the synthesis of a new
葫芦[7]尿素(CB7)是一种大环化合物,具有在水中形成最稳定的超分子复合物的能力,这是人工受体所报道的。然而,由于没有完全可逆的基于CB7的超分子复合物能够通过外部刺激控制重复解离/缔合的例子,因此其在高级功能材料设计中的用途非常有限。我们报告了新的二茂铁氨基酸的合成,该氨基酸与CB7形成了1:1的包合物,该包合物在低pH下在亚微摩尔浓度下稳定,但在高pH下会解离。此可逆过程用于通过CB7顺序吸收和释放双吡啶和蒽醌客体,而CB7是通过调节溶液的pH值来控制的。