Interface Engineering of Bi-Fluorescence Molecules for High-Performance Data Encryption and Ultralow UV-Light Detection

Jian Xin Wang, Luis Gutiérrez-Arzaluz, Jun Yin, Partha Maity, Yang Zhou, Cailing Chen, Yu Han, Osman M. Bakr, Mohamed Eddaoudi, Omar F. Mohammed*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


It is extremely difficult if not impossible to effectively and precisely regulate the luminescence of organic chromophores from different electronic excited states through external stimuli for use in light-conversion devices. This is mainly due to the difficulty in breaking Kasha's rule by large energy separation and stabilization of different emissive electronic excited states. Here, the authors address this great challenge in a single experiment by expanding the utility of a monounsaturated omega-9 fatty acid (oleic acid) capped with organic chromophores as a new and efficient luminescent regulator. More specifically, the authors have successfully promoted the use of oleic acid as an efficient and reversible switch that can precisely regulate chromophore luminescence. These time-resolved absorption and luminescence experiments, along with density functional theory calculations have clearly demonstrated that ultrafast electron transfer from oleic acid to the difluoroboron β-diketonate (DFBK) chromophores efficiently blocks the intramolecular charge transfer process of DFBK chromophores, and activates the locally excited state luminescence, leading to different emission colors from different electronic excited states for ultralow UV-light detection and high-performance data encryption.

Original languageEnglish (US)
Article number2200417
JournalAdvanced Optical Materials
Issue number12
StatePublished - Jun 20 2022

Bibliographical note

Funding Information:
This work was supported by the King Abdullah University of Science and Technology (KAUST).

Publisher Copyright:
© 2022 Wiley-VCH GmbH.


  • data encryption
  • excited state luminescence regulation
  • interfacial electron transfer
  • ultrafast spectroscopy
  • UV sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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