Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
Nat Commun. 2012 May 15;3:831. doi: 10.1038/ncomms1841.
The formation of macroscopic assemblies based on molecular recognition is promising in a wide variety of fields of materials science. Switching of the selectivity of macroscopic assemblies is of increasing importance to produce highly functional materials. Here we show macroscopic assembly based on molecular recognition using polyacrylamide gel modified with pyrenyl (Py) moiety (Py-gel) and gels possessing CD moieties (αCD-gel, βCD-gel and γCD-gel) in a mixed solvent of water and dimethyl sulfoxide. Changing the composition of the mixed solvent can switch the selectivity of Py-gel, because the fractions of the monomer and dimer of the Py moieties on the gel surface depend on the mixed solvent composition. The monomer and dimer of the Py moieties prefer βCD and γCD moieties, respectively.
基于分子识别的宏观组装在材料科学的各个领域都具有广阔的应用前景。宏观组装的选择性切换对于制备高功能材料变得越来越重要。在这里，我们展示了使用带有芘基（Py）部分的聚丙烯酰胺凝胶（Py-gel）和在水和二甲基亚砜的混合溶剂中具有环糊精（CD）部分的凝胶（αCD-gel、βCD-gel 和 γCD-gel）进行基于分子识别的宏观组装。改变混合溶剂的组成可以改变 Py-gel 的选择性，因为凝胶表面上的 Py 部分的单体和二聚体的分数取决于混合溶剂的组成。Py 部分的单体和二聚体分别优先与βCD 和γCD 部分结合。
