Zhou Wei-Lei, Lin Wenjing, Chen Yong, Dai Xian-Yin, Liu Yu
College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China.
College of Chemistry and Material Science, Innovation Team of Optical Functional Molecular Devices, Inner Mongolia Minzu University, Tongliao, 028000, P. R. China.
Small. 2023 Nov;19(46):e2304009. doi: 10.1002/smll.202304009. Epub 2023 Jul 13.
Macrocyclic confinement-induced supramolecular luminescence materials have important application value in the fields of bio-sensing, cell imaging, and information anti-counterfeiting. Herein, a tunable multicolor lanthanide supramolecular assembly with white light emission is reported, which is constructed by co-assembly of cucurbit[7]uril (CB[7]) encapsulating naphthylimidazolium dicarboxylic acid (G )/Ln (Eu /Tb ) complex and carbon quantum dots (CD). Benefiting from the macrocyclic confinement effect of CB[7], the supramolecular assembly not only extends the fluorescence intensity of the lanthanide complex G /Tb by 36 times, but also increases the quantum yield by 28 times and the fluorescence lifetime by 12 times. Furthermore, the CB[7]/G /Ln assembly can further co-assemble with CD and diarylethene derivatives (DAE) to realize the intelligently-regulated full-color spectrum including white light, which results from the competitive encapsulation of adamantylamine and CB[7], the change of pH, and photochromic DAE. The multi-level logic gate based on lanthanide supramolecular assembly is successfully applied in anti-counterfeiting system and information storage, providing an effective method for the research of new luminescent intelligent materials.
大环限域诱导的超分子发光材料在生物传感、细胞成像和信息防伪等领域具有重要的应用价值。在此，报道了一种具有白光发射的可调谐多色镧系超分子组装体，它是由包封萘基咪唑二羧酸（G）/Ln（Eu/Tb）配合物的葫芦[7]脲（CB[7]）与碳量子点（CD）共组装构建而成。得益于CB[7]的大环限域效应，该超分子组装体不仅将镧系配合物G/Tb的荧光强度提高了36倍，还将量子产率提高了28倍，荧光寿命延长了12倍。此外，CB[7]/G/Ln组装体可进一步与CD和二芳基乙烯衍生物（DAE）共组装，实现包括白光在内的智能调控全光谱，这是由金刚烷胺与CB[7]的竞争性包封、pH的变化以及光致变色的DAE导致的。基于镧系超分子组装体的多级逻辑门成功应用于防伪系统和信息存储，为新型发光智能材料的研究提供了一种有效方法。
