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A cyanostilbene-based molecule with aggregation-induced emission properties: amplified spontaneous emission, protonation effect and electroluminescence

  • Yujie Dong
  • Suqian Ma
  • Xiaoyu Zhang
  • Jingyu Qian
  • Nianyong Zhu
  • Bin XuEmail author
  • Cheuk-Lam HoEmail author
  • Wenjing TianEmail author
  • Wai-Yeung WongEmail author
Articles
  • 22 Downloads

Abstract

A terpyridine-substituted cyanostilbene derivative (Z)-2-(4′-([2,2′:6′,2″-terpyridin]-4′-yl)-[1,1′-biphenyl]-4-yl)-3-phenylacrylonitrile (CNSTPy) was synthesized and characterized. The compound exhibits remarkable aggregation-induced emission phenomenon and its single crystal shows a blue emission with fluorescent efficiency as high as 45%. Based on its aggregation state behavior, multiple applications towards exploring its lasing, fluorescence switching and electroluminescence properties were realized. Amplified spontaneous emission (ASE) was observed from the crystal and verified by the variable pump strip method, with a threshold value of ~1.5 mJ cm−2. The protonation/deprotonation processes accompanied by the formation of different molecular aggregation structure result in the distinct blue and yellow emissions. Additionally, the molecule also shows a moderate electroluminescence performance.

Keywords

aggregation-induced emission cyanostilbene amplified spontaneous emission protonation effect 

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Notes

Acknowledgements

This work was supported by the Hong Kong Research Grants Council (C6009-17G), the Areas of Excellence Scheme of HKSAR (AoE/P-03/08), the Clarea Au Endowed Professorship in Energy (847S) and the Hong Kong Polytechnic University (1-ZE1C). Y.J. Dong thanks the Hong Kong PhD Fellowship Scheme (HKPFS) from the Hong Kong Research Grants Council for the financial support.

Supplementary material

11426_2018_9366_MOESM1_ESM.pdf (78 kb)
Supplementary material, approximately 79 KB.

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Molecular Functional Materials and Department of ChemistryHong Kong Baptist UniversityHong KongChina
  2. 2.State Key Laboratory of Supramolecular Structure and MaterialsJilin UniversityChangchunChina
  3. 3.Department of Applied Biology & Chemical TechnologyThe Hong Kong Polytechnic UniversityHong KongChina
  4. 4.State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, College of Chemical EngineeringZhejiang University of TechnologyHangzhouChina

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