Ishijima Yukiko, Okaniwa Mamoru, Oaki Yuya, Imai Hiroaki
Department of Applied Chemistry , Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi, Kohoku-ku , Yokohama 223-8522 , Japan . Email:
Chem Sci. 2017 Jan 1;8(1):647-653. doi: 10.1039/c6sc03350d. Epub 2016 Aug 30.
Nanosheets have attracted much interest because of their characteristic properties originating from anisotropic and flexible structures. Inorganic nanosheets are synthesized from precursor layered compounds through exfoliation in a liquid phase. In contrast, a versatile exfoliation approach has not been fully studied for organic layered compounds. Here we report two exfoliation approaches for organic layered compounds. Hydrophilic and hydrophobic polydiacetylene (PDA) nanosheets, around 5 nm in thickness, are obtained through exfoliation of the layered precursor in aqueous and nonpolar organic media, respectively. The intercalation of ions and molecules in the interlayer space facilitates swelling and exfoliation. The resultant PDA nanosheets showed characteristic photochemical properties originating from the flexible structure. The exfoliation approach can be applied to a variety of organic layered compounds for the generation of designed nanosheets.
由于其源于各向异性和柔性结构的特性，纳米片引起了广泛关注。无机纳米片是通过前驱体层状化合物在液相中剥离而合成的。相比之下，一种通用的剥离方法尚未针对有机层状化合物进行充分研究。在此，我们报告了两种用于有机层状化合物的剥离方法。通过分别在水性和非极性有机介质中剥离层状前驱体，可获得厚度约为5纳米的亲水性和疏水性聚二乙炔（PDA）纳米片。离子和分子插入层间空间有助于膨胀和剥离。所得的PDA纳米片表现出源于柔性结构的特征光化学性质。该剥离方法可应用于多种有机层状化合物以生成设计的纳米片。
