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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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 developed.
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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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Cyclodextrin supramolecular assembly confined luminescent materials.

Xiaolu Zhou1, Hengzhi Zhang1, Yu Liu1

  • 1College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University Tianjin 300071 P. R. China yuliu@nankai.edu.cn.

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Macrocyclic supramolecular assemblies, particularly using cyclodextrins (CDs), enhance luminescence in guest molecules. These CD-based materials offer stimulus-responsive properties for advanced applications.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Luminescence

Background:

  • Macrocyclic supramolecular assembly confinement is crucial for inducing/extending luminescence in guest molecules.
  • This effect has broad applications across chemistry, biology, and materials science.

Purpose of the Study:

  • To review recent advances in cyclodextrin (CD) supramolecular assembly confined luminescent materials.
  • Highlighting the role of CDs in modulating luminescence and enabling stimulus-responsive behavior.

Main Methods:

  • Utilizing the hydrophobic cavity of CDs and their derivatives to encapsulate guest molecules.
  • Employing assembly and polymerization of CDs to restrict guest chromophore motion.
  • Investigating stimulus-responsive luminescence based on temperature, light, redox, and solvent polarity changes.

Main Results:

  • CD supramolecular assemblies effectively induce and enhance luminescence.
  • Achieved intelligent stimulus-responsive luminescence for various applications.
  • Demonstrated successful applications in targeted cell imaging, sensing, information encryption, anti-counterfeiting, and flexible electronics.

Conclusions:

  • Spatial confinement within CD supramolecular assemblies drives significant progress in supramolecular science.
  • Future developments include circularly polarized luminescence, energy transfer systems, and persistent luminescent materials.