摘要
在分子组装领域,光控自组装是调节分子有序性、多尺度结构和光电特性的一种智能策略.然而,传统光控自组装是通过光化学反应诱导分子结构变化的光化学过程来实施.由于副反应的存在和有限的转化率,光控自组装形成的纳米结构和形态往往难以预测.相反,仅利用分子从基态到激发态的构象变化的光物理过程实现激发态组装则能够避免以上缺点,并能够进一步促进整个材料体系的协同组装或相变.本文着重探讨了以多硫芳烃为基元的光激发诱导组装(photoexcitation-induced assembly,PEIA)策略.多硫芳烃能够产生从基态到激发态的重大分子构象转变,这种转变有利于形成分子间相互作用,进而推动分子运动、聚集和组装.系统介绍在分子水平上探索多硫芳烃的PEIA进展,进一步证明多硫芳烃的PEIA可以协同驱动聚合物体系中的分子运动和相变,并对PEIA未来发展所面临的关键问题和重要挑战进行了展望.
In the field of molecular assembly,photocontrolled self-assembly is an intelligent strategy to regulate molecular ordering,multiscale structure and optoelectronic properties.However,conventional photocontrolled self-assembly is implemented through a photochemical process in which photochemical reactions induce structural changes in molecules.The nanostructures and morphologies formed by photocontrolled self-assembly are often unpredictable due to the presence of side reactions and limited conversion rates.On the contrary,assembly by photophysical processes that only utilize the conformational changes of molecules from the ground state to the excited state can avoid the above drawbacks and can further promote the synergistic assembly or phase transition of the whole material system.In this paper,we focus on the photoexcitation-induced assembly(PEIA)strategy using polysulfide aromatic hydrocarbons(PAHs)as the building blocks.PAHs are capable of generating significant molecular conformational transitions from the ground state to the excited state,which are favorable for the formation of intermolecular interactions that drive molecular motions,aggregation,and assembly.In this paper,we systematically introduce the progress of exploring PEIA of polysulfide aromatics at the molecular level,further demonstrate that PEIA of polysulfide aromatics can synergistically drive molecular motions and phase transitions in polymer systems,and provide an outlook on the key issues and important challenges for the future development of PEIA.
作者
刘谋为
朱亮亮
Mou-wei Liu;Liang-liang Zhu(State Key Laboratory of Molecular Engineering of Polymers,Department of Macromolecular Science,Fudan University,Shanghai 200438)
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2024年第7期802-813,共12页
Acta Polymerica Sinica
关键词
激发态构象
多硫芳烃
光诱导
自组装
磷光
Excited-state conformation
Persulfurated arenes
Photoinduced self-assembly
Phosphorescence
