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Absolute Quantum Yield Measurement of Powder Samples
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Absolute Quantum Efficiencies.

G A Crosby1, J N Demas2, J B Callis3

  • 1Department of Chemistry, Washington State University, Pullman, Washington 99163.

Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry
|September 27, 2021
PubMed
Summary
This summary is machine-generated.

Advancements in chemistry, lasers, and instrumentation are improving quantum yield measurements. New molecules, purer samples, and laser techniques offer enhanced accuracy and broader spectral ranges for photochemical research.

Keywords:
Calorimetry in quantum yieldslaserphotodetectors in quantum yieldsquantum efficienciesuse in quantum yields

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Area of Science:

  • Photochemistry
  • Analytical Chemistry
  • Spectroscopy

Background:

  • Quantum yield measurement is crucial for understanding photochemical processes.
  • Traditional methods face limitations in accuracy, spectral range, and purity of samples.
  • Developments in laser technology and instrumentation offer potential solutions.

Purpose of the Study:

  • To survey recent advancements impacting quantum yield measurement.
  • To assess the influence of new chemical, laser, and instrumental techniques.
  • To explore novel approaches for enhanced quantum yield determination.

Main Methods:

  • Review of chemical synthesis, separation techniques, and photochemistry.
  • Analysis of laser applications in optical and calorimetric measurements.
  • Survey of current calorimetric methods and technological impacts.

Main Results:

  • New luminescent molecules and high-purity samples are emerging as potential standards.
  • Lasers offer advantages for time-resolved measurements and internal standardization.
  • Wavelength restrictions are being lifted, expanding spectral measurement capabilities.
  • Calorimetric methods show potential to rival optical techniques.

Conclusions:

  • Recent developments significantly enhance the precision and scope of quantum yield measurements.
  • Laser-based and advanced calorimetric techniques promise more accurate and versatile photochemical analysis.
  • The findings pave the way for broader applications of quantum yield determination in science.