Design, Synthesis and Characterization of Self-Assembling Nanotubes and Nanospheres

自组装纳米管和纳米球的设计、合成和表征

• 批准号: RGPIN-2017-05409
• 负责人: Dory, Yves
• 金额: $ 2.04万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=649498
• 关键词: Design; Synthesis; Characterization; Self; Assembling

The goal of the program is to obtain several new organic clusters having controlled shapes, tubes and spheres, through predicted self-assembly. The tubular and spherical clusters that we are targeting are held together by means of weak interactions: H-bonds and van der Walls contacts.****** Most sub-units leading to tubes have C3, Ci and S2 symmetry and are either cyclic peptides made from unusual amino-acids or polyamides of cis geometry. The cyclic peptides sub-units can stack on top of each other to generate wires or tubes having either very strong dipoles like alpha helices or no dipole at all. *** The other type of sub-units having disk shapes can either form sheets like graphite or balls of T, O or I symmetry, like buckminsterfullerene, that could encapsulate metals and other molecular objects. ***Supermolecules of these types could have direct applications in many areas of research and technology such as biological transport, drug delivery, sensing, non-linear optics, conductivity, photonics, gels and other new materials, catalysis…****** The program is based on an iterative process involving all the following steps to finally get a complete structure – properties relationship chart:***Step 1) The sub-units will be carefully designed and their self-assembly will be studied by molecular modelling. ***Step 2) The synthesis of the sub-units will be carried out in the laboratory.***Step 3) Their self-assembly and the properties of the supramolecular architectures will be studied with several modern techniques, like NMR, MS, SEM, TEM, crystallography, etc.***Step 4) Analysis of the results will either lead to useful supramolecules (that can be published and/or find applications) or necessitate a fine tuning, in which case the process will be restarted (step 1) with accumulated knowledge.

该计划的目标是通过预测的自组装获得几种具有可控形状，管和球的新有机簇。我们所针对的管状和球形簇通过弱相互作用保持在一起：氢键和货车der Walls接触。*导致管的大多数亚基具有C3、C1和S2对称性，并且是由不寻常的氨基酸制成的环肽或顺式几何构型的聚酰胺。环肽亚单元可以彼此堆叠以产生具有非常强的偶极如α螺旋或根本没有偶极的线或管。* 另一种具有圆盘形状的子单元可以形成像石墨一样的薄片，也可以形成T，O或I对称的球，如巴克敏斯特富勒烯，可以封装金属和其他分子物体。*** 这些类型的超分子可以直接应用于许多研究和技术领域，如生物运输，药物输送，传感，非线性光学，导电性，光子学，凝胶和其他新材料，催化... ***** 该程序是基于一个迭代过程，涉及所有以下步骤，最终得到一个完整的结构-性能关系图：* 步骤1）将仔细设计子单元，并通过分子建模研究它们的自组装。* 步骤2）亚单位的合成将在实验室中进行。*第三步：利用NMR、MS、SEM、TEM、结晶学等现代技术，研究它们的自组装和超分子结构的性质。步骤4）对结果的分析将导致有用的超分子（其可以被发表和/或找到应用）或需要微调，在这种情况下，该过程将利用积累的知识重新开始（步骤1）。