New click reactions for conjugated polymers

共轭聚合物的新点击反应

• 批准号: 1970393
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1970393
• 关键词: New; click; reactions; conjugated; polymers

Conjugated polymers are a highly promising class of materials for a diverse range of applications, from the active components of optoelectronic devices like lasers or displays, to solar cells, sensors, actuators, capacitors and bioelectronics devices. The key to their application in these areas is the ability to tune both the electronic and physical properties of the polymer. To date most approaches to manipulate such properties have relied on the copolymerisation of appropriate monomeric materials. For example the incorporation of varying amounts of electron deficient monomers into an electron rich backbone can result in significant influence on the band gap due to the hybridisation of the frontier molecular orbitals, whereas the incorporation of branched or linear sidechains can be utilised to tune polymer crystallinity and processability. However the establishment of structure-property relationships in such copolymers is complicated by the necessity to synthesise batches of varying comonomer ratios, in which it is difficult to disentangle the influence of changes in the backbone chemistry from variations in the molecular weight, end-groups and dispersities of different batches. The later are known to have a significant impact on polymer performance, and are difficult to control as comonomer ratios vary. This work will overcome these difficulties by the development of methods to directly modify the aromatic backbone of the conjugated polymer post-polymerisation, thus enabling the synthesis of libraries with consistent dispersity and length.

共轭聚合物是一类极具前景的材料，具有广泛的应用前景，从激光器或显示器等光电器件的活性组件，到太阳能电池、传感器、执行器、电容器和生物电子器件。它们在这些领域应用的关键是能够调节聚合物的电子和物理性能。迄今为止，大多数控制此类性质的方法都依赖于适当单体材料的共聚。例如，由于前沿分子轨道的杂化，将不同量的缺电子单体掺入到富电子主链中可能会对带隙产生显着影响，而支化或线性侧链的掺入可用于调节聚合物结晶度和可加工性。然而，由于需要合成不同共聚单体比例的批次，因此在此类共聚物中建立结构-性能关系变得复杂，其中很难将主链化学变化与不同批次的分子量、端基和分散度变化的影响分开。众所周知，后者对聚合物性能有显着影响，并且随着共聚单体比例的变化而难以控制。这项工作将通过开发直接修饰共轭聚合物后聚合的芳香族主链的方法来克服这些困难，从而能够合成具有一致分散性和长度的文库。