Multicolor-Luminescence Including White Light by Photomodulation of Supramolecular Assemblies in Aqueous Media

Shubhra Kanti Bhaumik, Supratim Banerjee

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Photo-responsive supramolecular systems offer intriguing functional aspects which have led to their applications in diverse fields such as optoelectronics and biomedicine. However, the modulation of the luminescence output in a spatiotemporal fashion by photo-controlled transformation still remains a challenging task. Herein, we report the controlled regulation of the emission color of supramolecular assemblies of amphiphilic cyanostilbenes (CSs) in water through in situ photomodulation employing UV and sunlight. Due to their aggregation-induced emission (AIE) features, the CS chromophores in the supramolecular assemblies exhibited bright greenish-yellow emission. Photoirradiation predominantly led to the formation of a cyclized product exhibiting aggregation-caused quenching (ACQ) features and having efficient cyan-blue emission in water but severely quenched emission in the solid state. Hence, starting from a unicomponent scaffold, photomodulation provided tunable emission ranging from greenish-yellow to cyan-blue including white light in water. Furthermore, using the contrasting AIE and ACQ behavior of the components in the photoirradiated mixtures, we were able to design rewritable fluorescent inks and encryption in solid films indicating the practical utility of these systems.

Original languageEnglish
Pages (from-to)36936-36946
Number of pages11
JournalACS Applied Materials and Interfaces
Volume14
Issue number32
DOIs
StatePublished - 17 Aug 2022
Externally publishedYes

Keywords

  • aggregation induced emission
  • cyanostilbene
  • multicolor luminescence
  • photoresponsive materials
  • supramolecular self-assembly

ASJC Scopus subject areas

  • General Materials Science

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