Exploration of nanoscale metal coordination polymer synthesis using self-assembled block copolymer motifs

利用自组装嵌段共聚物基序合成纳米级金属配位聚合物的探索

• 批准号: 402137-2011
• 负责人: Wang, Xiaosong
• 金额: $ 3.28万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=573172
• 关键词: Exploration; nanoscale; metal; coordination; polymer

Metal coordination polymers (MCP) possess rich functions derived from their framework structures and chemical composition. But they usually have poor solubility in solvents and therefore can not be processed once prepared. This limitation is hindering the widespread applicability of MCP. To address this challenge and to study nanostructure related properties, synthesis of processible nanoscale MCP (NMCP) particles becomes attractive and have potential to deliver richer functionality to MCP nanotechnologies. Unfortunately, our knowledge on this rising area is rudimentary and there is no technique available for rational structure variation. In contrast, conventional organic polymers are processible and their preparation has reached an advanced level with a few techniques available for molecular engineering. One type of structure-defined polymers is block copolymer, in which chemically different polymer segments are covalently bonded in one molecules. This type of molecules undergoes self-assembly in a block selective solvent or oil/water mixed solvents, leading to the formation of micelle-like aggregates or oil droples, respectively. This aspect of block copolymer supramolecular chemistry has been intensively studied and exerts great control on the resulting assemblies in terms of their size, shape, and even architecture. We therefore intend to apply this developed knowledge in block copolymer self-assembly to the recently emerged area of NMCP for nanomaterial innovation. Prusian blue will be used as a MCP model system because of its simplicity and generality in preparation. The research will involve well-defined cyanoferrate metallo-polymer synthesis, self-assembly and metal coordination polymerization in an attempt to develop strategies for the preparation of processible, structure-defined functional PB nanoparticles. Ultimately, the proposed research will lead to the establishment of a research subfield at the boundary of block copolymer and NMCP. A brand new type of processible polymeric porous nanomaterials, which is highly demanded for energy, healthcare and security applications, can be expected from the establishment and exploration of this area.

金属配位聚合物（MCP）因其骨架结构和化学组成而具有丰富的功能。但它们通常在溶剂中的溶解度较差，因此一旦制备就无法进行加工。这种限制阻碍了 MCP 的广泛应用。为了应对这一挑战并研究纳米结构相关特性，合成可加工的纳米级 MCP (NMCP) 颗粒变得很有吸引力，并且有可能为 MCP 纳米技术提供更丰富的功能。不幸的是，我们对这个上升领域的了解还很初级，并且没有可用于合理结构变化的技术。相比之下，传统的有机聚合物是可加工的，并且通过一些可用于分子工程的技术，其制备已达到先进水平。一种结构限定的聚合物是嵌段共聚物，其中化学上不同的聚合物片段共价键合在一个分子中。此类分子在嵌段选择性溶剂或油/水混合溶剂中进行自组装，分别形成胶束状聚集体或油滴。嵌段共聚物超分子化学的这一方面已得到深入研究，并对所得组件的尺寸、形状甚至结构进行了很大的控制。因此，我们打算将嵌段共聚物自组装方面的成熟知识应用到最近出现的 NMCP 纳米材料创新领域。由于普鲁士蓝制备简单、通用，因此将采用普鲁士蓝作为MCP模型系统。该研究将涉及明确的氰基铁酸盐金属聚合物合成、自组装和金属配位聚合，试图制定可加工、结构明确的功能性PB纳米颗粒的制备策略。最终，所提出的研究将导致在嵌段共聚物和 NMCP 边界建立一个研究子领域。该领域的建立和探索可以期待一种全新的可加工聚合物多孔纳米材料，其在能源、医疗保健和安全应用中的需求量很大。