Intrinsic Properties of Single Graphene Nanoribbons in Solution: Synthetic and Spectroscopic Studies

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DOI

  • Yinjuan Huang, Shanghai Jiaotong University
  • ,
  • Fugui Xu, Shanghai Jiaotong University
  • ,
  • Lucia Ganzer, CNR-IFN
  • ,
  • Franco V.A. Camargo, CNR-IFN
  • ,
  • Tetsuhiko Nagahara, CNR-IFN, Kyoto Institute of Technology
  • ,
  • Joan Teyssandier, Instituut voor Kern- en Stralingsfysica
  • ,
  • Hans Van Gorp, Instituut voor Kern- en Stralingsfysica
  • ,
  • Kristoffer Basse
  • ,
  • Lasse Arnt Straasø
  • Vaiva Nagyte, Manchester University
  • ,
  • Cinzia Casiraghi, Manchester University
  • ,
  • Michael Ryan Hansen, Westfälische Wilhelms-Universität Münster
  • ,
  • Steven De Feyter, Instituut voor Kern- en Stralingsfysica
  • ,
  • Deyue Yan, Shanghai Jiaotong University
  • ,
  • Klaus Müllen, Max Planck Institute for Polymer Research
  • ,
  • Xinliang Feng, Technische Universitat Dresden
  • ,
  • Giulio Cerullo, CNR-IFN
  • ,
  • Yiyong Mai, Shanghai Jiaotong University

We report a novel type of structurally defined graphene nanoribbons (GNRs) with uniform width of 1.7 nm and average length up to 58 nm. These GNRs are decorated with pending Diels-Alder cycloadducts of anthracenyl units and N-n-hexadecyl maleimide. The resultant bulky side groups on GNRs afford excellent dispersibility with concentrations of up to 5 mg mL-1 in many organic solvents such as tetrahydrofuran (THF), two orders of magnitude higher than the previously reported GNRs. Multiple spectroscopic studies confirm that dilute dispersions in THF (<0.1 mg mL-1) consist mainly of nonaggregated ribbons, exhibiting near-infrared emission with high quantum yield (9.1%) and long lifetime (8.7 ns). This unprecedented dispersibility allows resolving in real-time ultrafast excited-state dynamics of the GNRs, which displays features of small isolated molecules in solution. This study achieves a breakthrough in the dispersion of GNRs, which opens the door for unveiling obstructed GNR-based physical properties and potential applications.

Original languageEnglish
JournalJournal of the American Chemical Society
Volume140
Issue33
Pages (from-to)10416-10420
Number of pages5
ISSN0002-7863
DOIs
Publication statusPublished - 22 Aug 2018

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