Article Self‐Assembled 2D Sheets of an Amphiphilic Sexiphenyl Exhibit Intense Polarized Blue Emission in the Solid State

Pramita Mondal ; Jonathan P. Hill SAMURAI ORCID (National Institute for Materials Science) ; Gouranga Manna ; Sharmistha De Dalui ; Edward A. Neal (National Institute for Materials Science) ; Gary. J. Richards ; Katsuhiko Ariga SAMURAI ORCID (National Institute for Materials Science) ; Yusuke Yamauchi (National Institute for Materials Science) ; Lok Kumar Shrestha SAMURAI ORCID (National Institute for Materials Science) ; Somobrata Acharya

Advanced Optical Materials - 2024 - Mondal - Self‐Assembled 2D Sheets of an Amphiphilic Sexiphenyl Exhibit Intense.pdf
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Pramita Mondal, Jonathan P. Hill, Gouranga Manna, Sharmistha De Dalui, Edward A. Neal, Gary. J. Richards, Katsuhiko Ariga, Yusuke Yamauchi, Lok Kumar Shrestha, Somobrata Acharya. Self‐Assembled 2D Sheets of an Amphiphilic Sexiphenyl Exhibit Intense Polarized Blue Emission in the Solid State. Advanced Optical Materials. 2024, 12 (18), 2400177. https://doi.org/10.1002/adom.202400177
SAMURAI

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(abstract)

Distinct from inorganic 2D nanomaterials (e.g., graphene, MoS2, etc,), self-assembled organic 2D materials are significant due to the unique advantages of fine structure tunability and functionality. Electronically and photofunctionally-active compounds (e.g., pentacene, p-sexiphenyl) are highly attractive for applications but are limited by difficult handling and the existence of only a few native structures of the compounds. Here, it is shown that a p-sexiphenyl derivative incorporated into 2D multilamellar sheets with chromophores oriented in the layers exhibits a significant polarization of photoluminescence. Highly emissive, amphiphilic sexiphenyl with hydrophilic/hydrophobic groups self-assembles at air–water interface with chromophore orientation in the resulting films being controlled by monolayer compression. Large-area multilamellar structures with p-sexiphenyl chromophores highly oriented against the 2D plane are prepared by consecutive film transfers. The 2D sheets exhibit significant polarization of photoluminescence with polarization ratio 0.8 between orthogonal in-plane axes. Notably, multilamellar structures cannot be established for the same p-sexiphenyl using thermotropic processing thus emphasizing the importance of the 2D sheet multilayer synthesis process. Amphiphile design can be applied for the tailored synthesis of large-area multilayered 2D sheets and used to construct highly efficient light-emitting devices.

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Keyword: Sexiphenyl, 2D materials, Self-assembly, polarized fluorescence emission, Langmuir-Blodgett

Date published: 2024-03-14

Publisher: Wiley

Journal:

  • Advanced Optical Materials (ISSN: 21951071) vol. 12 issue. 18 p. 1-8 2400177

Funding:

  • Japan Science and Technology Corporation JPMJER2003
  • Queensland Node of the Australian National Fabrication Facility ANFF-Q
  • SERB-STAR #STR/2020/000053

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1002/adom.202400177

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Updated at: 2024-11-22 16:30:48 +0900

Published on MDR: 2024-11-22 16:30:48 +0900

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