Reversible covalent chemistry for property modification of conjugated materials

用于共轭材料性能改性的可逆共价化学

• 批准号: RGPIN-2020-05149
• 负责人: Skene, William
• 金额: $ 4.66万
• 依托单位: Université de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=740414
• 关键词: Reversible; covalent; chemistry; property; modification

The intrinsic properties of conjugated materials are well-suited for their use in a range of plastic electronic devices. Such materials are prepared by coupling aromatic building blocks with robust covalent bonds. Tuning the properties of conjugated materials to match the requirements of a given application requires the judicious selection of monomer building blocks. Once coupled, the properties are locked and they cannot be adjusted. Material degradation during standard device operation results in performance deterioration. The device must then be discarded, resulting in environmental waste. The overarching program goal is to increase the reusability of devices by rejuvenated the intrinsic properties of conjugated materials. This will have ecological rewards, by improving the recycling of devices and reducing electronic waste that is disposed in land fills. Towards this end, it is proposed to leverage the reversibility of dynamic covalent bonds for property tuning. By incorporating the reversible bond into aromatic precursors, conjugated materials with reversible properties will be possible. Reversible property tuning will be done by exchanging the components of conjugated materials. Attaching the conjugated materials to an electroactive surface via covalent bonds will lead to electrodes whose color, fluorescence, and redox chemistry can be modified by reversibly exchanging the components. Different reversible covalent bonds will be explored to develop robust electroactive layers whose properties can be indefinitely adjusted and rejuvenated by component exchange. A combined electrochemical-spectrometer setup will be used to simultaneously measure the change in electrochemistry, color, and fluorescence with component exchange. Property regeneration and materials recycling will be applied to electrochromic devices for improving both their lifetime and end-of-life recyclability. Ultimately, devices can be reused in a different application by rewriting their properties via component exchange, making plastic electronics truly recyclable. Reversible covalent bonds will also be implemented into conductive-stretchable surfaces to make them self-healing. Towards this goal, new monomers will be prepared for developing reparable conductive elastomers. Fatigue induced breaks in the rubber-like electrodes that form when they are repeatedly stretched and bent can be repaired. The developed monomers will also be applied to other substrates, especially those from sustainable and degradable feedstocks. This will lead to the "greening" of plastic electronics by extending their lifetime. Developing electrodes from renewable resources coupled with the self-healing and recyclable properties will reduce the environmental footprint of plastic electronics. Collectively, these properties will move plastic electronics closer towards being truly sustainable, recyclable, and degradable.

共轭材料的固有特性非常适合在一系列塑料电子设备中使用。通过将芳族构建块与稳健的共价键耦合来制备此类材料。调整共轭材料的特性以符合给定应用的要求，需要明智地选择单体构建块。耦合后，属性将被锁定，无法调整它们。标准设备操作期间的材料降解会导致性能恶化。然后必须丢弃该设备，从而导致环境浪费。总体计划的目标是通过恢复共轭材料的内在特性来提高设备的可重复性。通过改善设备的回收并减少在土地填充物中处置的电子废物，这将获得生态奖励。为此，提议利用动态共价键的可逆性进行财产调整。通过将可逆键合成芳香的前体，将有可能具有可逆性的共轭材料。可逆的属性调整将通过交换共轭材料的组件来完成。通过共价键将共轭材料连接到电活性表面，将导致电极通过可逆交换组件来修饰其颜色，荧光和氧化还原化学的电极。将探索不同的可逆共价键，以开发出可靠的电活性层，其性能可以通过组件交换无限期地调整和恢复活力。组合的电化学 - 光谱计设置将用于同时测量与组件交换的电化学，颜色和荧光的变化。财产再生和材料回收将应用于电致质设备，以改善其寿命和寿命终止可回收性。最终，可以通过通过组件交换重写其属性来重复使用设备，从而使塑料电子设备真正可回收。可逆的共价债券也将被实施到可触发性的表面中，以使其自我修复。为了实现这一目标，将为开发可调节的导电弹性体做好准备。疲劳引起的橡胶状电极的断裂，可以反复拉伸并弯曲时形成。开发的单体也将应用于其他底物，尤其是来自可持续和降解原料的底物。这将通过延长塑料电子产品的“绿色”。从可再生资源以及自我修复和可回收特性的开发电极将减少塑料电子产品的环境足迹。总的来说，这些特性将使塑料电子设备更加接近真正可持续，可回收和降解。