发光
超分子化学
材料科学
深铬移
四苯乙烯
荧光
纳米颗粒
光化学
纳米技术
结晶学
晶体结构
化学
光电子学
物理
聚集诱导发射
量子力学
作者
Mengdi Tian,Ze Wang,Xing Yuan,Heng Zhang,Zhixue Liu,Yu Liu
标识
DOI:10.1002/adfm.202300779
摘要
Abstract Herein, multilevel supramolecular assemblies are reported based on sulfobutylether‐β‐cyclodextrin (SBE‐βCD) and cucurbit[8]uril (CB[8]), which can control the topological morphology from nanoparticles to nanosheets and modulate the multicolor luminescence. Benefiting from the large cavity of CB[8] and its strong binding affinity with positively charged tetraphenylethylene pyridinium (TPE‐Py), a 1:2 stoichiometric supramolecular assembly is formed through host–guest interactions with binding constants of 2.95 × 10 11 M −2 and fluorescence bathochromic shift about 35 nm due to the macrocyclic confinement effect, thereby endowing the fluorescence enhancement about 20 times when further assembled with negatively charged SBE‐βCD to form nanosheets through electrostatic interactions. In contrast, the direct assembly of TPE‐Py and SBE‐βCD can form nanoparticles through electrostatic interactions, showing only tenfold enhancement and no bathochromic shift due to the lack of macrocyclic confinement effect. After doping the near‐infrared dye acceptor sulfonated aluminum phthalocyanine (AlPcS4), the nanosheets structure exhibits a higher energy transfer efficiency of about 75% and a larger antenna effect of 29.3 than that of nanoparticles. The multilevel supramolecular assemblies can be used in multicolor luminescence information storage and multiple logical gate systems, providing an efficient approach for configurationally confined topological morphology regulation and luminescent materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI