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Related Experiment Videos

Switching between Phosphorescence and Fluorescence Controlled by Chiral Self-Assembly.

Guofeng Liu1, Yanli Zhao1,2

  • 1Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|September 22, 2017
PubMed
Summary

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Researchers achieved switchable singlet-triplet emission using helical self-assembly in a unimolecular system. This controllable switching between fluorescence and phosphorescence opens new avenues for intelligent luminescent materials.

Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Photophysics

Background:

  • Helical self-assembly regulates localized excitations in π-functional systems, enabling multi-scale orders and tuning molecular electronic, vibrational, and rotational energies.
  • Chiral self-assembly offers controllable and dynamic properties, leading to highly ordered helical structures with amplified photoluminescence and fascinating photophysical properties.
  • Achieving effective control over singlet-triplet emissive switching in a unimolecular platform presents a significant challenge in materials science.

Purpose of the Study:

  • To develop a unimolecular platform for switchable singlet-triplet emission.
  • To investigate the role of helical self-assembly in controlling fluorescence and phosphorescence.
  • To demonstrate reversible switching between emission states in solution and solid states.
Keywords:
helical structuresmechanoluminescencephosphorescent‐fluorescent switchingself‐assemblysupramolecular chirality

Related Experiment Videos

Main Methods:

  • Utilizing helical self-assembly driven by intermolecular hydrogen bonding and π-π stacking interactions.
  • Employing a unimolecular platform designed for switchable emission.
  • Conducting experiments in N,N-dimethylformamide/H2O solution and solid-state conditions.

Main Results:

  • Demonstrated reversible switching between fluorescence and phosphorescence in a unimolecular system.
  • Successfully induced switchable singlet-triplet emission through helical self-assembly.
  • Achieved efficient control of emission switching in both solution and solid states.

Conclusions:

  • Helical self-assembly provides an effective strategy for controlling singlet-triplet emission switching in unimolecular systems.
  • The developed approach inspires the design of intelligent luminescent materials through chiral self-assembly.
  • This work contributes to the interdisciplinary development of supramolecular self-assembly and materials science.