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Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells
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Rotors tailoring molecular stacking for constructing multi-stimuli-responsive luminescent materials.

Zheng-Fei Liu1, Lan Zeng1, Li-Ya Niu1

  • 1Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China. qzyang@bnu.edu.cn.

Chemical Communications (Cambridge, England)
|February 8, 2023
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Summary

Researchers developed a novel luminescent material with rotor components that responds to multiple stimuli. Its crystalline structure dictates its responsiveness, with one crystal form exhibiting tunable emission and the other remaining inert.

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Area of Science:

  • Materials Science
  • Crystallography
  • Photophysics

Background:

  • Luminescent materials are crucial for various applications, but achieving multi-stimuli responsiveness remains a challenge.
  • Controlling material properties through crystalline polymorphism is an active area of research.

Purpose of the Study:

  • To design and synthesize a novel multi-stimuli-responsive luminescent material.
  • To investigate the relationship between crystal structure, molecular rotors, and luminescence properties.

Main Methods:

  • Synthesis of a luminescent material incorporating rotor moieties.
  • Crystallization to form distinct polymorphic forms (G and O).
  • Characterization of luminescence properties under various external stimuli.
  • X-ray structure analysis to determine crystal structures.

Main Results:

  • The material forms two distinct crystalline phases, G and O.
  • Crystal G exhibits luminescence that can be modulated by multiple external stimuli (e.g., temperature, pressure, light).
  • Crystal O shows no significant response to the applied stimuli.
  • X-ray analysis identified the rotor moieties as essential for the observed polymorphic emission and stimuli-responsive behavior.

Conclusions:

  • The presence and arrangement of rotor moieties within specific crystal structures are critical for achieving multi-stimuli-responsive luminescence.
  • Polymorphism plays a key role in determining the functional properties of luminescent materials.
  • This work provides insights into the design of advanced responsive materials.