How do things glow in the dark?
Chemistry For Your Life
Forbidden transitions and the spin flip
Melissa describes the 'forbidden transition' when spin flips to a triplet state, making return slower and rarer.
#198
In this special Halloween episode Melissa and Jam explore the spooky yet fascinating world of glow-in-the-dark chemistry. The discussion delves into nostalgic aspects of Halloween, focusing particularly on phosphorescence and the forbidden transitions that cause electrons to glow. The chemistry behind these glowing phenomena is explained with engaging analogies, making complex concepts more accessible. They also share their favorite glow-in-the-dark items from childhood, connecting science with personal memories. The episode is a fun and informative dive into the eerie light of glow-in-the-dark materials.
00:00 Spooky Halloween Introduction
00:42 The Science of Glow in the Dark
05:07 Understanding Electron Excitation
16:10 The Forbidden Transition
20:25 Exploring Electron Excitation
21:41 Forbidden Transitions and Rare Materials
22:21 Space Analogies and Electron Behavior
24:35 Creative Analogies for Electron States
26:02 Recap and Detailed Explanation
33:06 Glow-in-the-Dark Nostalgia
39:24 Listener Engagement and Support
References from this episode:
- https://www.eia.gov/kids/for-teachers/lesson-plans/pdfs/GlowInTheDarkSecondary.pdf
- https://youtu.be/V32ex9eCFHI
- https://www.chemistryworld.com/podcasts/strontium-aluminate/3008606.article
- https://www.acs.org/molecule-of-the-week/archive/z/zinc-sulfide.html
- Physical Chemistry by Levine, 6th edition
We want to give a special thanks to Bri McAllister for illustrating molecules for some episodes! Please go check out Bri’s art, follow and support her at entr0pic.artstation.com and @McAllisterBri on twitter!
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