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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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Fluorescent Nanoparticles for the Measurement of Ion Concentration in Biological Systems
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A novel sodium-fluorescent crystal.

Yunsu Ma1, Yongjie Liu1, Yuan Wang1

  • 1School of Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 22004, People's Republic of China.

Royal Society Open Science
|May 7, 2021
PubMed
Summary

Researchers developed a new sodium-fluorescent crystal (Na-FS) with blue light emission. This novel material exhibits excellent photostability and resistance to photobleaching, making it promising for optical applications.

Keywords:
blue fluorescencefluorescent crystalsodium-fluorescent crystal

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Area of Science:

  • Materials Science
  • Crystallography
  • Photophysics

Background:

  • Development of novel fluorescent materials is crucial for advanced optical and sensing technologies.
  • Sodium-containing compounds offer unique electronic and structural properties for material design.
  • Hydrothermal synthesis provides a versatile route for crystalline material fabrication.

Purpose of the Study:

  • To synthesize and characterize a novel sodium-fluorescent crystal (Na-FS).
  • To investigate the structural, conformational, and optical properties of the synthesized Na-FS.
  • To evaluate the photostability, photobleaching resistance, and quantum yield of Na-FS.

Main Methods:

  • One-pot hydrothermal synthesis using 4-dimethylaminobenzoic acid and sodium hydroxide.
  • Single-crystal X-ray diffraction and scanning electron microscopy for structural confirmation.
  • Fluorescence spectroscopy to analyze optical properties, including emission spectra and quantum yield.

Main Results:

  • A novel triclinic crystal, Na-FS (space group P-1), was successfully synthesized.
  • Structural parameters confirmed: cell dimensions a=10.5113(3) Å, b=15.9198(5) Å, c=15.9560(5) Å, Z=2.
  • Na-FS exhibits blue fluorescence emission (~360 nm) with high photostability, photobleaching resistance, and a quantum yield of 30.58%.

Conclusions:

  • The synthesized Na-FS is a stable blue-emitting fluorescent crystal.
  • Its excellent photophysical properties suggest potential applications in optoelectronics and fluorescent probes.
  • The study demonstrates the efficacy of the hydrothermal method for creating functional sodium-based fluorescent materials.