Toward a Single-Layer Two-Dimensional Honeycomb Supramolecular Organic Framework in Water

详细信息    查看全文

• 作者：Kang-Da Zhang ; Jia Tian ; David Hanifi ; Yuebiao Zhang ; Andrew Chi-Hau Sue ; Tian-You Zhou ; Lei Zhang ; Xin Zhao ; Yi Liu ; Zhan-Ting Li
• 刊名：Journal of the American Chemical Society
• 出版年：2013
• 出版时间：November 27, 2013
• 年：2013
• 卷：135
• 期：47
• 页码：17913-17918
• 全文大小：437K
• 年卷期：v.135,no.47(November 27, 2013)
• ISSN：1520-5126

文摘

The self-assembly of well-defined 2D supramolecular polymers in solution has been a challenge in supramolecular chemistry. We have designed and synthesized a rigid stacking-forbidden 1,3,5-triphenylbenzene compound that bears three 4,4鈥?bipyridin-1-ium (BP) units on the peripheral benzene rings. Three hydrophilic bis(2-hydroxyethyl)carbamoyl groups are introduced to the central benzene ring to suppress 1D stacking of the triangular backbone and to ensure solubility in water. Mixing the triangular preorganized molecule with cucurbit[8]uril (CB[8]) in a 2:3 molar ratio in water leads to the formation of the first solution-phase single-layer 2D supramolecular organic framework, which is stabilized by the strong complexation of CB[8] with two BP units of adjacent molecules. The periodic honeycomb 2D framework has been characterized by various ¹H NMR spectroscopy, dynamic light scattering, X-ray diffraction and scattering, scanning probe and electron microscope techniques and by comparing with the self-assembled structures of the control systems.