Micro‐ and Nanometer‐Scale Porous,Fibrous, and Sheet Architectures Constructed by Supramolecular Assemblies of Dipyrrolyldiketones |
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| Authors: | Hiromitsu Maeda Prof. Dr. Yukio Kusunose Masahiro Terasaki Yoshihiro Ito Chikoto Fujimoto Rika Fujii Takashi Nakanishi Dr. |
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| Affiliation: | 1. Department of Bioscience and Biotechnology, Faculty of Science and Engineering, Ritsumeikan University, Kusatsu 525‐8577, Japan, Fax: (+81)?77‐561‐2659;2. Department of Applied Molecular Science, Institute for Molecular Science (IMS), Okazaki 444‐8787, Japan;3. Organic Nanomaterials Center (ONC) and International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), Tsukuba 305‐0044, Japan, Fax: (+81)?29‐860‐4706 |
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| Abstract: | X‐ray analysis of some 1,3‐dipyrrolyl‐1,3‐propanediones synthesized from pyrroles and malonyl chloride derivatives revealed 1D supramolecular networks formed by N? H???O?C interactions in the solid state. Micro‐ and nanometer‐scale morphologies of porous, fibrous, and sheet structures were fabricated by hydrogen‐bonding interactions and determined by fine‐tuning the substituents and the solvents used. Of the unique polymorphs, ordered 2D lamellar sheet structures of the derivatives with long alkyl chains (C16H33, C14H29, and so on) were constructed by van der Waals hydrophobic effects between aliphatic chains as well as hydrogen bonding. |
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| Keywords: | hydrogen bonds nanostructures polymorphism self‐assembly supramolecular chemistry |
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