文献类型：期刊文献

英文题名：White-light emission from a single organic compound with unique self-folded conformation and multistimuli responsiveness

作者：Li, Dengfeng[1];Hu, Wende[1];Wang, Jie[1];Zhang, Qiwei[1];Cao, Xiao-Ming[1];Ma, Xiang[1];Tian, He[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Ctr Computat Chem,Inst Fine Chem,Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2018

卷号：9

期号：26

起止页码：5709

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20182805529385);WOS:【SCI-EXPANDED(收录号:WOS:000437467400002)】；

基金：We gratefully acknowledge the financial support from NSFC (21788102, 21722603, 214210004 and 21476075), Programme of Introducing Talents of Discipline to Universities (B1607), the Innovation Program of Shanghai Municipal Education Commission and the Fundamental Research Funds for the Central Universities. Dr X. Rao is also thanked for refining the manuscript.

语种：英文

外文关键词：Hydrophobicity - Solvents - Light emission - Molecules - Synthesis (chemical) - Display devices - Charge transfer

摘要：White-light emitting organic materials attract broad attention which are ascribed to their potential for applications in lighting devices and display media. Most reported organic white-light emitters rely on the combination of several components that emit different colors of light (red/green/blue or orange/blue), which may cause problems to stability, reproducibility and device fabrication. By contrast, white-light emission from single-molecule systems offers opportunities to overcome these disadvantages, meanwhile engendering white-light with high quality. Nevertheless, limited cases of white-light emission at the molecular scale reported principally concentrate on organic solvents. Herein, we designed and synthesized new bi-functional organic molecules with a symmetric donor-acceptor-donor (D-A-D) type structure with the aim to construct a single-molecule white-light emitting system in aqueous solution. Further experiments and calculations demonstrate the possibility of stacking between the pyridinium-naphthalene (PN) core and coumarin groups in the designed molecules, ascribed to hydrophobic effects, p-p stacking and donor-acceptor interactions, which could dramatically enhance the intramolecular charge transfer (ICT) efficiency along with remarkable charge transfer (CT) emission. Based on this, multicolor photoluminescence including white-light can be finely tuned in various modes including excitation wavelength, solvent polarity, temperature, and host-guest interactions. A white-light emitting (WLE) hydrogel was also facilely prepared through the dispersion of one of the compounds in a commercial agarose gelator. This innovative study helps enrich the strategies to construct singlemolecule organic white-light emitting materials in aqueous medium using the self-folding behavior.