文献类型：期刊文献

英文题名：Self-Assembly Solid-State Enhanced Red Emission of Quinolinemalononitrile: Optical Waveguides and Stimuli Response

作者：Shi, Chuanxing[1,2];Guo, Zhiqian[1,2];Yan, Yongli[3,4];Zhu, Shiqin[1,2];Xie, Yongshu[1,2];Zhao, Yong Sheng[3,4];Zhu, Weihong[1,2];Tian, He[1,2]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, BNLMS, Key Lab Photochem, Beijing 100190, Peoples R China;[4]Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China

年份：2013

卷号：5

期号：1

起止页码：192

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20130315908525);WOS:【SCI-EXPANDED(收录号:WOS:000313143800027)】；

基金：This work was supported by NSFC/China, National 973 Program (No. 2013CB733700), the Oriental Scholarship (No. SRFDP 200802510011), the Fundamental Research Funds for the Central Universities (Nos. WK1013002, WJ1114013), STCSM (No. 10dz2220500), and the Open Funding Project of State Key Laboratory of Luminescent Materials and Devices (SCUT) for providing financial support to this project. Helpful discussion with Dr. Z. Y. Zhang and Q Zhang was greatly appreciated.

语种：英文

外文关键词：solid-state fluorescence; self-assembly; crystal structures; optical waveguides; stimuli-response; cell imaging

摘要：The fluorescence of luminescent emitters is often quenched in the solid state, because of the typical aggregation-caused quenching (ACQ) effect, which is a thorny obstacle to high-performance organic optoelectronic materials. The exploration of solid-state enhanced long wavelength, red-emitting chromophores, especially possessing one-dimensional (1D) assembly features, is of great importance. Interestingly, an excellent solid-state enhanced red emission system (denoted as ED) based on quinolinemalononitrile has been developed via the delicate modification of the conventional ACQ dicyanomethylene-4H-pyran (DCM) derivative (denoted as BD) through crystal engineering. ED exhibits extraordinary self-assembly property in a variety of solvents, even realizing the "waving ribbons" with a length of 6 mm and a diameter of 10 mu m. Crystal analysis shows that the CH center dot center dot center dot pi and CH center dot center dot center dot N supramolecular interactions of ED contribute to the twisted self-assembly solid-state enhanced emission phenomenon. However, for BD, strong face-to-face stacking leads to fluorescence quenching in the solid state. Because of such easy assembly and strong solid-state emission properties, application for optical waveguides of ED is realized with a low optical loss. Stimuli-responsive behavior is also elaborated with color change between orange and red by grinding/filming or pressing/heating.