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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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Updated: Apr 12, 2026

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

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Published on: November 14, 2015

Dynamic Hydrogen-Bonding Switching Enables Crystal Transformation for Multi-Stimuli Responsive Fluorescence.

Lei Gao^1,2, Glib V Baryshnikov³, Amjad Ali⁴

¹State Key Laboratory of Advanced Fiber Materials, Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, China.

Angewandte Chemie (International Ed. in English)

|April 11, 2026

Summary

This summary is machine-generated.

Researchers developed new organic cocrystals that change structure and luminescence in response to stimuli. This dynamic hydrogen-bond switching strategy enables reversible crystal transformations for advanced smart materials.

Keywords:

charge transfer cocrystal dynamic fluorescence hydrogen bonds stimuli‐responsive materials supramolecular chemistry

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Area of Science:

Materials Science
Supramolecular Chemistry
Organic Chemistry

Background:

Controlling solid-state structural transitions in organic cocrystals for stimulus-responsive luminescence is challenging.
Developing materials with tunable optical properties is crucial for advanced applications.

Purpose of the Study:

To design and synthesize organic cocrystal systems with reversible crystal transformation and stimulus-responsive luminescence.
To investigate the role of dynamic hydrogen-bond switching in controlling cocrystal behavior.

Main Methods:

Synthesis of conformationally adaptive V-shaped molecules (26PY, 35PY, 13PH) acting as electron donors.
Formation of cocrystals using hydrogen-bond acceptors like water, DMF, DMSO, TCNB, and DNB.
Mechanical grinding and thermal treatment to induce crystal phase transitions and luminescence changes.

Main Results:

Achieved reversible crystal transformation and stimulus-responsive luminescence through dynamic hydrogen-bond switching.
Identified hydrated intermediates and binary/ternary cocrystal formation based on solvent interactions.
Demonstrated tunable fluorescence in cocrystals with various nitroaromatic compounds.

Conclusions:

The developed cocrystal systems exhibit controllable structural transitions and luminescence.
This strategy offers a pathway for creating novel smart materials for sensing and anti-counterfeiting applications.
Highlights the potential of dynamic hydrogen bonding in designing responsive supramolecular materials.