文献类型：期刊文献

英文题名：Supramolecular Assembly-Driven Color-Tuning and White-Light Emission Based on Crown-Ether-Functionalized Dihydrophenazine

作者：Sun, Guangchen[1,2];Pan, Jiajie[1,2];Wu, Yifan[1,2];Liu, Yue[1,2];Chen, Wei[1,2];Zhang, Zhiyun[1,2];Su, Jianhua[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai 200237, Peoples R China

年份：2020

卷号：12

期号：9

起止页码：10875

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20201008255326);WOS:【SCI-EXPANDED(收录号:WOS:000518702300084)】；

基金：We thank the financial support from the NSFC/China (21788102, 21905090, 21790361, and 91859205), Shanghai Municipal Science and Technology Major Project (grant no. 2018SHZDZX03), Shanghai Science and Technology Committee (17520750100), Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Programme of Introducing Talents of Discipline to Universities (B16017), and Natural Science Foundation of Shanghai (19ZR1412200).

语种：英文

外文关键词：excited-state planarization; emission color tuning; supramolecular assembly; potassium ion recognition; moisture detection

摘要：The development of color-tunable white-light-emitting systems is significant for artificial smart materials. Recently, a set of conformational dependent fluorophores N,N'-diaryl-dihydrodibenzo[a,c]phenazines (DPACs) have been developed with unique photoluminescence mechanism vibration-induced emission (VIE). DPACs can emit intrinsical blue emission at a bent excited state and abnormal orange-red emission at a planar excited state, which are due to the varied r-conjugation via excited-state configuration transformation along the N-N' axis from bent to planar form. Herein, a novel VIE-active compound DPAC-[B15C5](2) is designed and synthesized with two wings of benzo-1 5-crown-5. The excited-state vibration of the DPAC moiety can be modulated by tuning the supramolecular assembly and disassembly via chelation competition of K+ between 15-crown-5 and 18-crown-6, and hence, a wide-color-tuning emission is achieved from blue to orange-red including white. Dynamic light scattering and transmission electron microscopy experiments were conducted to exhibit the supramolecular assembling process. Additionally, the moisture detection in organic solvents is realized since the water could dissociate the supramolecular assembly.