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Related Concept Videos

Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
Photoluminescence: Applications01:14

Photoluminescence: Applications

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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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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Low-energy Cathodoluminescence for OxyNitride Phosphors
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Afterglow Copper(I) Iodine Cluster Scintillator.

Ying-Nan Zhao1, Qi Yang1, Bo-Han Yao1

  • 1Tianjian Laboratory of Advanced Biomedical Sciences, Henan Key Laboratory of Crystalline Molecular Functional Materials, College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China.

Angewandte Chemie (International Ed. in English)
|February 12, 2025
PubMed
Summary

A novel copper(I) iodine cluster exhibits high quantum yield and unique afterglow, paving the way for advanced X-ray imaging applications.

Keywords:
X-ray imagingafterglow emissionaggregation-induced emissioncopper-iodide clusterscintillator

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Area of Science:

  • Materials Science
  • Photophysics
  • Radiological Imaging

Background:

  • Copper(I) iodine clusters are known for their excellent photophysical properties.
  • These properties include high luminescence efficiency, large Stokes shift, and tunable lifetimes.
  • Developing new materials with enhanced luminescence is crucial for advanced applications.

Purpose of the Study:

  • To synthesize and characterize a novel copper(I) iodine cluster, Cu2I2-CH3CN.
  • To investigate its unique photoluminescence properties, including afterglow and aggregation-induced emission (AIE).
  • To evaluate its potential as an X-ray scintillator for imaging.

Main Methods:

  • Synthesis of the copper(I) iodine cluster (Cu2I2-CH3CN).
  • Characterization of photoluminescence properties, including quantum yield, thermally activated delayed fluorescence (TADF), and phosphorescence.
  • Fabrication of a flexible scintillator screen for X-ray imaging.

Main Results:

  • The synthesized Cu2I2-CH3CN exhibited ultrahigh quantum yield (90.1% in solid state) and AIE behavior.
  • Simultaneous occurrence of TADF and long-lifetime phosphorescence was observed.
  • The material demonstrated excellent X-ray excited luminescence (XEL) properties.
  • A flexible scintillator screen achieved a spatial resolution of 23.6 LP mm-1.

Conclusions:

  • Cu2I2-CH3CN possesses remarkable photoluminescence properties attributed to large spin-orbit coupling and crystal rigidity.
  • Its high quantum efficiency and TADF characteristics make it a promising candidate for X-ray scintillators.
  • The successful fabrication of a flexible scintillator screen highlights its practical potential in X-ray imaging.