Morphology and photophysical properties of dual-emissive hyperbranched zinc phthalocyanines and their self-assembling superstructures

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• 作者：Kun Jia ; Lin Pan ; Zicheng Wang ; Liting Yuan ; Xuefei Zhou…
• 刊名：Journal of Materials Science
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：51
• 期：6
• 页码：3191-3199
• 全文大小：2,311 KB
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• 作者单位：Kun Jia (1)
  Lin Pan (1)
  Zicheng Wang (1)
  Liting Yuan (1)
  Xuefei Zhou (1)
  Yumin Huang (1)
  Chunhui Wu (2)
  Xiaobo Liu (1)
  
  1. Research Branch of Advanced Functional Materials, High Temperature Resistant Polymer and Composites Key Laboratory of Sichuan Province, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, People’s Republic of China
  2. Department of Biophysics, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

Hyperbranched zinc phthalocyanines (HBZnPCs) showing dual-emissive fluorescence in N, N-dimethylformamide (DMF) solution were synthesized via a facile one-step cycloaddition of conjugated bisphthalonitrile precursors. The chemical, crystalline structures, surface morphology, and photophysical properties of synthesized HBZnPCs for different reaction times were systematically studied. It was found that HBZnPCs synthesized for 4 h exhibit the strongest dual fluorescent emission at ~440 and 690 nm in DMF, respectively, when excited at 365 nm, and micrometer scale sheet-like morphology was obtained in this case. In addition, the fluorescent emission of HBZnPCs dramatically changed in different solvents: the red emission was amplified in solvent of strong polarity, while blue emission dominated in non-co-ordinated solvent. More interestingly, we found for the first time that the fluorescence of initially “dark” H-aggregates of HBZnPCs in DMF/H₂O mixed solvent was gradually recovered through self-assembling driven by the poor solvent, leading to a strong emission around 460 nm, which contributed to the formation of stable J-type superstructures. Kun Jia and Lin Pan have contributed equally to this work.Electronic supplementary materialThe online version of this article (doi:10.​1007/​s10853-015-9630-8) contains supplementary material, which is available to authorized users.