Synthesis and applications of conjugated polymers with controllable microporosity and electroactivity

微孔率和电活性可控共轭聚合物的合成及应用

• 批准号: 312643-2011
• 负责人: Zhao, Yuming
• 金额: $ 4.01万
• 依托单位: Memorial University of Newfoundland
• 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=571791
• 关键词: Synthesis; applications; conjugated; polymers; controllable

Carbon-based nanomaterials constitute the centerpiece of current "nano"-oriented sciences and technologies, the advancement and fruition of which will lead to immediate, visible, and continuing impacts in the ongoing technology developments. Construction of defined microstructures on the nanometer (one-billionth of a meter) scale in a precise and controlled manner is a sine qua non for the technological applications of nanomaterials, while "molecular tailoring" provides the most effective means to achieving this goal. The proposed research will investigate novel conjugated polymer/oligomer-based nanomaterials designed with "intelligences" to show defined structural and luminescence responses to external stimuli (electric or photonic). By means of multi-step organic synthesis, two types of nanostructured organic materials will be prepared and investigated. (i) Microporous network polymer membranes that possess nanometer-scale tiny "pores", the sizes of which can be expanded and contracted under the control of electric potential. Such microscopic behavior mimics that of the skin pores and can be used as a key component for building a novel type of "opto-electronic noses" for sensing various vaporous chemicals. (ii) Linear molecular wires (oligomers) that show multi-stage folding behavior regulated by electric or chemical inputs. These molecular wires are designed to exhibit the Rubik's Snake-like electromechanical properties, and we will explore the use of these materials in fabrication of switchable "nano-containers" to encapsulate and sort out molecular or macromolecular hosts, such as single-walled carbon nanotubes. Implementation of the proposed research program will not only enrich our fundamental understanding on advanced nanomaterials and train highly qualified young researchers, but find wide-ranging applications in cutting-edge technologies such as chemical sensors, molecular switches, artificial membranes and skins, and ultra-miniaturized optoelectronic devices.

碳基纳米材料构成了当前“纳米”科学技术的核心，其进步和成果将对当前的技术发展产生直接、可见和持续的影响。以精确、可控的方式构建纳米（十亿分之一米）尺度的特定微观结构是纳米材料技术应用的必要条件，而“分子剪裁”则为实现这一目标提供了最有效的手段。 拟议的研究将研究新型共轭聚合物/低聚物纳米材料，其设计具有“智能”，以显示对外部刺激（电或光子）的明确结构和发光响应。通过多步有机合成，将制备并研究两种类型的纳米结构有机材料。 (i) 微孔网络聚合物膜，具有纳米级的微小“孔”，其尺寸可以在电势的控制下膨胀和收缩。这种微观行为模仿了皮肤毛孔的行为，可以用作构建新型“光电鼻”以感知各种气态化学物质的关键组件。 (ii) 线性分子线（低聚物），表现出受电或化学输入调节的多级折叠行为。这些分子线旨在表现出魔蛇般的机电特性，我们将探索如何使用这些材料来制造可切换的“纳米容器”，以封装和分类分子或大分子主体，例如单壁碳纳米管。拟议研究计划的实施不仅将丰富我们对先进纳米材料的基本了解，培养高素质的年轻研究人员，而且会在化学传感器、分子开关、人造膜和皮肤以及超纳米材料等尖端技术中找到广泛的应用。小型化光电器件。