Dynamic rotaxane-branched dendrimers with precisely arranged luminogens for efficient light harvesting. (June 2022)

• Record Type: Journal Article
• Authors: Li, W.-J.; Jiang, H.; Wang, X.-Q.; Zhang, D.-Y.; Zhu, Y.; Ke, Y.; Wang, W.; Yang, H.-B.
• Is Part Of: Materials today chemistry. Volume 24(2022)
• Publication Date: 2022-06
• Subjects: Platinum acetylide -- Aggregation-induced emission -- Mechanically interlocked molecules -- Mechanically interlocked dendrimers -- Stimuli-responsiveness; AIEgens aggregation-induced emission luminogens -- TIPS triisopropylsilyl ether -- TPE tetraphenylethene; Chemistry -- Periodicals; Materials -- Research -- Periodicals; Materials science -- Periodicals; Chemistry; Materials -- Research; Electronic journals; Periodicals; 660.282
• DOI: 10.1016/j.mtchem.2022.100874
• Languages: English
• ISSNs: 2468-5194

Abstract

Abstract: Although the development of artificial light-harvesting systems (LHSs) has attracted increasing attention, the construction of novel artificial LHSs with co-existed various types of precisely arranged luminogens has been still a major challenge. Herein, starting from [2]rotaxane building blocks AN-R or TPE-R functionalized with either anthracene or tetraphenylethene (TPE) moiety, a family of novel rotaxane-branched dendrimers containing two types of energy donors on the branches and one pyrene moiety at the central core as energy acceptor have been successfully constructed through a facile, efficient, and controllable divergent approach. Notably, attributed to the solvent-induced switching feature of the rotaxane branches, the integrated rotaxane-branched dendrimers displayed an interesting dynamic feature. More importantly, as revealed by fluorescence spectra, the resultant rotaxane-branched dendrimers displayed enhanced antenna effects along with the increase of dendrimer generation. Therefore, these rotaxane-branched dendrimers described herein could serve as not only promising platforms for light harvesting but also excellent candidates for the construction of smart supramolecular materials for practical applications. Highlights: Rotaxane-branched dendrimers with precisely arranged luminogens were synthesized. Enhanced antenna effects along with the increase of dendrimer generation were achieved. A novel and promising light-harvesting system for potential applications was constructed.