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Open-Source Photochemistry in the Organic Chemistry Teaching Laboratory.

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Area of Science:

  • Organic Chemistry
  • Photochemistry
  • Chemical Education

Background:

  • Undergraduate organic chemistry labs often lack hands-on experience with photochemical principles.
  • Developing cost-effective and accessible experimental setups is crucial for modern science education.

Purpose of the Study:

  • To develop an undergraduate organic chemistry laboratory exercise focused on photochemistry.
  • To introduce students to photochemical principles using low-cost, open-source photoreactors.
  • To investigate the impact of photon wavelength on a chemical reaction.

Main Methods:

  • Nine 3D printed photoreactors with varying emission maxima (near-UV to near-IR) were constructed.
  • Students performed the bromination of bibenzyl using these photoreactors.
  • Class data was pooled to analyze the wavelength dependence of the reaction.

Main Results:

  • The experiment successfully demonstrated the impact of photon wavelength on the bromination of bibenzyl.
  • Students were able to rationalize the observed wavelength-dependent reaction outcomes.
  • Post-lab surveys indicated increased student understanding of photochemistry and hypothesis formulation.

Conclusions:

  • The developed laboratory exercise effectively introduces undergraduate students to photochemistry.
  • The use of low-cost, open-source photoreactors enhances student learning and engagement.
  • This activity fosters critical thinking, hypothesis generation, and adaptive learning skills in students.