Xu Wen-Wen, Chen Yong, Lu Yi-Lin, Qin Yue-Xiu, Zhang Hui, Xu Xiufang, Liu Yu
College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China.
Angew Chem Int Ed Engl. 2022 Feb 1;61(6):e202115265. doi: 10.1002/anie.202115265. Epub 2021 Dec 21.
A series of solid supramolecules based on acrylamide-phenylpyridium copolymers with various substituent groups (P-R: R=-CN, -CO Et, -Me, -CF ) and cucurbit[7]uril (CB[7]) are constructed to exhibit tunable second-level (from 0.9 s to 2.2 s) room-temperature phosphorescence (RTP) in the amorphous state. Compared with other solid supramolecules P-R/CB[7] (R=-CN, -CO Et, -Me), P-CF /CB[7] displays the longest lifetime (2.2 s), which is probably attributed to the fluorophilic interaction of cucurbiturils leading to a uncommon host-guest interaction between 4-phenylpyridium with -CF and CB[7]. Furthermore, the RTP solid supramolecular assembly (donors) can further react with organic dyes Eosin Y or SR101 (acceptors) to form ternary supramolecular systems featuring ultralong phosphorescence energy transfer (PpET) and visible delayed fluorescence (yellow for EY at 568 nm and red for SR101 at 620 nm). Significantly, the ultralong multicolor PpET supramolecular assembly can be further applied in fields of anti-counterfeiting and information encryption and painting.
构建了一系列基于具有不同取代基（P-R：R = -CN、-COEt、-Me、-CF）的丙烯酰胺-苯基吡啶共聚物和葫芦[7]脲（CB[7]）的固体超分子，以在非晶态下表现出可调谐的二级（从0.9秒到2.2秒）室温磷光（RTP）。与其他固体超分子P-R/CB[7]（R = -CN、-COEt、-Me）相比，P-CF/CB[7]表现出最长的寿命（2.2秒），这可能归因于葫芦脲的亲氟相互作用导致4-苯基吡啶与-CF和CB[7]之间存在罕见的主客体相互作用。此外，RTP固体超分子组装体（供体）可以进一步与有机染料曙红Y或SR101（受体）反应，形成具有超长磷光能量转移（PpET）和可见延迟荧光（曙红Y在568nm处为黄色，SR101在620nm处为红色）的三元超分子体系。值得注意的是，超长多色PpET超分子组装体可进一步应用于防伪、信息加密和绘画领域。
