An Aggregation-Induced Emission Luminogen with Efficient Luminescent Mechanochromism and Optical Waveguiding Properties

Authors

  • Dr. Na Zhao,

    1. HKUST-Shenzhen Research Institute, No. 9 Yuexing 1st RD, South Area, Hi-tech Park, Nanshan, Shenzhen, 518057 (China)
    2. Department of Chemistry, Division of Biomedical Engineering, Institute for Advanced Study and Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong (China), Fax: (+852) 2358-1594
    Search for more papers by this author
  • Chuang Zhang,

    1. CAS Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P. R. China)
    Search for more papers by this author
  • Dr. Jacky W. Y. Lam,

    1. HKUST-Shenzhen Research Institute, No. 9 Yuexing 1st RD, South Area, Hi-tech Park, Nanshan, Shenzhen, 518057 (China)
    2. Department of Chemistry, Division of Biomedical Engineering, Institute for Advanced Study and Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong (China), Fax: (+852) 2358-1594
    Search for more papers by this author
  • Prof. Yong Sheng Zhao,

    1. CAS Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P. R. China)
    Search for more papers by this author
  • Prof. Ben Zhong Tang

    Corresponding author
    1. HKUST-Shenzhen Research Institute, No. 9 Yuexing 1st RD, South Area, Hi-tech Park, Nanshan, Shenzhen, 518057 (China)
    2. Department of Chemistry, Division of Biomedical Engineering, Institute for Advanced Study and Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong (China), Fax: (+852) 2358-1594
    3. Guangdong Innovative Research Team, SCUT-HKUST Joint Research Laboratory, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (China)
    • HKUST-Shenzhen Research Institute, No. 9 Yuexing 1st RD, South Area, Hi-tech Park, Nanshan, Shenzhen, 518057 (China)

    Search for more papers by this author

Abstract

In this study, a yellow luminogen (TPE-DCV) was synthesized by treating tetraphenylethene with two dicyanovinyl units. TPE-DCV is non-emissive in solution but becomes a strong emitter when aggregated in poor solvents or in the solid state, thereby displaying a phenomenon of aggregation-induced emission. The solid-state emission of TPE-DCV can be reversibly switched between green and yellow with a moderate contrast ratio by grinding and fuming or heating processes owing to the morphological change between thermodynamically stable crystalline phase and the metastable amorphous state and vice versa. Negligible reabsorption and well-ordered molecular arrangement of the microcrystals of TPE-DCV make them promising as optical waveguide materials with low optical loss.

Ancillary