A Visible‐Light‐Induced Dynamic Mechanical Bond as a Linkage for Dynamic Materials. (5th August 2019)

• Record Type: Journal Article
• Authors: Yin, Yong‐Fei; Yun, Meng‐Yan; Wu, Lin; Duan, Hong‐Ying; Jiang, Xia‐Min; Zhan, Tian‐Guang; Cui, Jiecheng; Liu, Li‐Juan; Zhang, Kang‐Da
• Is Part Of: Angewandte Chemie. Volume 131:Number 36(2019)
• Page Start: 12835
• Page End: 12840
• Publication Date: 2019-08-05
• Subjects: Dynamische Bindungen -- Dynamische Materialien -- Mechanische Bindungen -- Photoresponsivität -- Rotaxane; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201906761
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Exploring dynamic bonds and their applications in fabricating dynamic materials has received great attention. A photoinduced [2]rotaxane‐based dynamic mechanical bond (DMB) features visible‐light‐triggered dynamic bonding behavior that is essentially distinguished from conventional dynamic chemical bonds. In this DMB, a photoisomerizable ortho ‐fluoroazobenzene unit is introduced as a steric‐controllable stopper, the visible‐light‐induced dynamic wagging movement of which enables the photoregulated threading of the macrocycle. This allows reversible in situ de‐/reforming of the mechanical bond without involving dynamic chemical linkage. The DMB‐cross‐linked polymeric gel shows interesting photoinduced degradation behavior upon visible light irradiation. Benefiting from the distinctive dual dynamic nature of reversible bonding behavior and mechanical interlocked structure, this DMB is expected to serve as a new type of dynamic bond that can be applied in designing dynamic soft materials. Abstract : Hochdynamisch : Eine durch sichtbares Licht induzierte dynamische mechanische Bindung (DMB) wurde konstruiert. Das photoinduzierte dynamische Bindungsverhalten ermöglicht die Herstellung eines DMB‐quervernetzten dynamischen polymeren Gels.