Free interactive chemistry · SIM-PHOTO-001

Jablonski diagram

A Jablonski diagram: what happens to a molecule after it absorbs light.

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How to use this simulation

Choose a molecule.
Press “New photons” and watch the paths: fluorescence, phosphorescence or heat.
Read the quantum yields and the bar chart for 1000 photons.

What to notice

Each yield is a competition between rate constants.
Phosphorescence is spin-forbidden, so T₁ lives much longer.

Try this

Which molecule phosphoresces the most? What makes it different?

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