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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Time-Dependent Solvent-Driven Solid-State Fluorescence-based Numeric Coding.

Yu-Dong Yang1,2, Xu-Lang Chen1,3, Jiaqi Liang1

  • 1College of Chemistry, Beijing Normal University, No. 19, XinJieKouWai Street, HaiDian District, Beijing 100875, P. R. China.

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|June 16, 2023
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Summary
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Researchers developed new solid-state materials from a hydrocarbon macrocycle and dyes that transform between amorphous and crystalline states. These transformations enable controllable, time-dependent fluorescence changes for generating data codes.

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Solid-State Chemistry

Background:

  • Controllable solid-state transformations are key for developing novel functional materials.
  • Host-guest complexation offers a versatile platform for creating tunable solid-state systems.

Purpose of the Study:

  • To report on solid-state systems formed by an all-hydrocarbon macrocycle (cyclo[8](1,3-(4,6-dimethyl)benzene), CDMB-8) and aggregation-caused quenching dyes.
  • To investigate the controllable interconversion between amorphous, co-crystalline, and mixed crystalline states.
  • To demonstrate the application of these transformations in generating data codes via fluorescence changes.

Main Methods:

  • Synthesis of co-crystals and amorphous materials via host-guest complexation.
  • Induction of solid-state transformations using grinding or solvent vapor exposure.
  • Characterization using single-crystal X-ray diffraction, powder X-ray diffraction, and solid-state fluorescence spectroscopy.

Main Results:

  • Seven co-crystals and six amorphous materials were successfully synthesized.
  • Most materials exhibited significant turn-on fluorescence (up to 20-fold enhancement).
  • Structural interconversions between states were reliably induced and monitored, leading to time-dependent fluorescence modulation.

Conclusions:

  • The developed solid-state systems demonstrate controllable structural transformations with tunable fluorescence properties.
  • These materials offer a novel platform for responsive functional materials and data encoding.
  • The ability to precisely control solid-state structure and optical output via external stimuli is highlighted.