Zhou Wei-Lei, Lin Wenjing, Chen Yong, Dai Xian-Yin, Liu Zhixue, Liu Yu
College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University People's Republic of China
College of Chemistry and Materials Science, Inner Mongolia Key Laboratory of Chemistry for Nature Products and Synthesis for Functional Molecules, Inner Mongolia Minzu University Tongliao 028000 People's Republic of China.
Chem Sci. 2021 Nov 24;13(2):573-579. doi: 10.1039/d1sc05861d. eCollection 2022 Jan 5.
Multivalent supramolecular assemblies have recently attracted extensive attention in the applications of soft materials and cell imaging. Here, we report a novel multivalent supramolecular assembly constructed from 4-(4-bromophenyl)pyridine-1-ium bromide modified hyaluronic acid (HABr), cucurbit[8]uril (CB[8]) and laponite® clay (LP), which could emit purely organic room-temperature phosphorescence (RTP) with a phosphorescence lifetime of up to 4.79 ms in aqueous solution multivalent supramolecular interactions. By doping the organic dyes rhodamine B (RhB) or sulfonated rhodamine 101 (SR101) into the HABr/CB[8]/LP assembly, phosphorescence energy transfer was realized with high transfer efficiency (energy transfer efficiency = 73-80%) and ultrahigh antenna effect (antenna effect value = 308-362) within the phosphorescent light harvesting system. Moreover, owing to the dynamic nature of the noncovalent interactions, a wide-range spectrum of phosphorescence energy transfer outputs could be obtained not only in water but also on filter paper and a glass plate by adjusting the donor-acceptor ratio and, importantly, white-light emission was obtained, which could be used in the application of information encryption.
多价超分子组装体最近在软材料和细胞成像应用中引起了广泛关注。在此，我们报道了一种由4-(4-溴苯基)吡啶溴化铵修饰的透明质酸（HABr）、葫芦[8]脲（CB[8]）和锂蒙脱石®粘土（LP）构建的新型多价超分子组装体，其在多价超分子相互作用下，在水溶液中可发出纯有机室温磷光（RTP），磷光寿命长达4.79毫秒。通过将有机染料罗丹明B（RhB）或磺化罗丹明101（SR101）掺杂到HABr/CB[8]/LP组装体中，在磷光光捕获系统内实现了具有高转移效率（能量转移效率 = 73 - 80%）和超高天线效应（天线效应值 = 308 - 362）的磷光能量转移。此外，由于非共价相互作用的动态性质，不仅在水中，而且在滤纸和玻璃板上，通过调节供体 - 受体比例可以获得广泛的磷光能量转移输出光谱，重要的是，获得了可用于信息加密应用的白光发射。
