Wu Yanyun, Liu Jiongjiang, Wang Mengya, Wu Xinzhou, Cai Wanan, Niu Haijun, Lang Kai
Key Laboratory of Functional Inorganic Materials Chemistry (Ministry of Education) and School of Chemistry and Materials Science, Heilongjiang University, Harbin, China.
Printable Electronics Research Center, Nano Devices and Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China.
Nat Chem. 2025 Jun 19. doi: 10.1038/s41557-025-01851-7.
The emergence of organic semiconductors has laid the foundation for the field of plastic electronics. Controlling π-conjugation by designing proper conjugated moieties is one of the commonest strategies for achieving desired semiconducting properties in conjugated materials. Despite significant advancements in the field, the reversible formation of extended conjugation to in situ switch the nature of macromolecules between semiconductors and insulators remains elusive. Here we disclose a generic strategy for developing polymeric structures that incorporate molecular switch units. These units enable the controlled activation and deactivation of linear conjugation in response to acid-base or electronic stimuli. This is achieved by copolymerizing non-π-conjugated lactone-functionalized xanthene moieties with traditional π-conjugated building blocks. With 2,6-dihydroxynaphthalene as an 'electro-acid', the electrochromic-like properties of these polymers were explored, demonstrating an effective in situ conversion of the non-conjugated, colourless polymers into conjugated, coloured polymers.
有机半导体的出现为塑料电子学领域奠定了基础。通过设计合适的共轭部分来控制π共轭是在共轭材料中实现所需半导体特性的最常见策略之一。尽管该领域取得了重大进展，但通过扩展共轭原位切换大分子在半导体和绝缘体之间性质的可逆形成仍然难以捉摸。在此，我们揭示了一种开发包含分子开关单元的聚合物结构的通用策略。这些单元能够响应酸碱或电子刺激，对线性共轭进行可控的激活和失活。这是通过将非π共轭内酯官能化的呫吨部分与传统的π共轭结构单元共聚来实现的。以2,6 - 二羟基萘作为“电酸”，探索了这些聚合物的类电致变色性质，证明了非共轭无色聚合物有效地原位转化为共轭有色聚合物。
