Making bad glow toys.

Hi. I need to disagree with you about something. In the Jablonski diagram you show in the video, it is clear that the energy of the first excited triplet level is lower than the energy of the first excited singlet level. This means that the wavelength of the phosphorescence must be longer than the wavelength of the corresponding fluorescence. That, however, is not the case with ZnS -- the color does not change significantly when the excitation is turned off. This tells us the afterglow of ZnS is not phosphorescence. [The diagram in the video is a description of organic phosphorescence; but ZnS is not organic, and without further research we do not know whether the diagram applies to it. In the absence of an appropriate wavelength shift, though, it doesn't much matter.] Here's an abstract that mentions the mechanism of the afterglow: https://aip.scitation.org/doi/abs/10.1063/1.1747266 Part of the problem here is that 'phosphorescence' is both a common word and a technical term. It seems to me that when we are discussing materials like ZnS, strontium aluminate glow powders, manganocalcite, and so on, it is much better to speak of afterglow or the persistence of the luminescence. Many thanks for the videos! Happy holidays -- jon

No I am trying to see if MnO2 from Kmno4 and Kbr would work. for electroplating. I stay away from any explosives like Perchlorates!

Daniel Blake Shoemaker

I assume you're trying to make anodes for perchlorate cells. The problem is not as much plating the MnO2, but making it not dissolving back into the cell. It would be interesting if it works.

Silviu T

I like it. Makes for some potential future work on a night like.

Intermemediate of MnO2.

Daniel Blake Shoemaker

I'm sure it's not KMnO4 itself that gets plated. Maybe some manganese oxide.

Silviu T

I found you can plate KmnO4 onto steel and titanium, https://www.youtube.com/watch?v=AbrEiaRAgqw&list=UUWQwowQtbt1NpsAyO0w2QSA&index=15

Daniel Blake Shoemaker

Here my video on gels and lasers Red nile. Sadly the laser after 6 months - 60 dollars worth is dying. https://www.youtube.com/watch?v=iqSOv5xmHLc&list=UUWQwowQtbt1NpsAyO0w2QSA&index=14

Daniel Blake Shoemaker

mix ZnS with KBrO3 and ignite, produces lots of smoke

Im not sure what you mean. But, it gets "charged" every time its exposed to UV light and will re-emit

Nile Red

Cool I use dyes like that glow powder with lasers.

Daniel Blake Shoemaker

It's a repeatable process, reexposed ZnS to UV light and it will glow in the dark. It's the most common glow in the dark chemical in stuff like stickers and tacky Halloween decorations.

Kevin Faccenda

That's definitely noticeable. Does it re-emit light after exposure or is there a chemical reaction occurring?

Will Latinette

I read that as Making "bad" toys glow... Awesome work!

PseudsPie