Elementary Productions: Singlet Oxygen

[CavalloDiSpade]

why not just add bleach (sodium hypochlorite) to the peroxide? Does that directly produce triplet oxygen instead of singlet? if so why?

[SteveMcbulet]

I'm very happy that I discovered this ''chemistry series''!!! It is a very nice illustration for students. I shall suggest this series at my next chemistry class! :D

[bonuerd]

How to use rose bengal and sun lamp to generate singlet oxygen and use it in organic synthesis . Have you ever do that?

[cometaluminosa]

Very interesting video. I wonder what could happen if you apply a strong magnetic field along the direction of the test tube, first in a sense then in the other.

[hobomnky]

what about fluorine? would that have a brighter red colour?

[acronus]

Very cool. I've always wondered if mono-oxygen was even possible.

Thank you.

[Draxis32]

3:00

*Light goes on*

Ooooooh nooo! I exaggerated on this done!

I AIN'T CLEANING THIS UP!

[AkisKiraleos]

Your videos are great, but boring. I think you should add a voice in there =)

[61slugbug]

where did you get the container that you poured the sodium hydroxide from?

[GingleGangle1]

Is the red light monochromatic?

[TheMoni286]

why was the oxygen excited? too much energy released by the reaction?

[mario8401]

put some new video .... :)

[Glasfaserleitung]

Why dont you use The Trichlorisocyanuric acid to make chlorine? Potassium permanganate is too expensive.

[mabakken]

Didn't have access to it at the time ;)

[GingleGangle1]

@Glasfaserleitung MnO2 is even cheaper)

[Nikioko]

You can omit the peroxide. Normally chlorine and hydroxide form hypochlorite which turns into chloride and singulet oxygen.

[Envergure]

I don't know if anyone's ever told you this, but it can be very difficult for some people to read white text against a white background :P

[jmrdelorean]

Highly concentrated solutions of NaOH can actually corrode glass.

[pudidotdk]

That's a cool experiment. I heard that oxygen crystals have a red color in this article:

clipmarks[dot]com/clipmark/D92­64B76-6DDF-483B-B31C-5398B2DF6­1FE/

is it the same priciple?

[mabakken]

First of all: sorry for late reply!

But yes, in some way that would be the same principle, but at the same time not. All materials behave differently under varied pressured, but it has to do with "spin" and quantum mechanics.

[adriankocian]

red solid oxygen is O4, isn´t it?

[mabakken]

Yes and no. Before 2006 they thought that solid, red Oxygen at extremely high pressures was O4, but they discovered that it was in fact O8 =)

[megafeltch]

interesting

good video 5*

[derkozten]

Very good explanation using molecular orbits, bla287.

How could you write the up and down arrows, and greek letters?

[bla287]

Oh, I used the Windows char table :)

%SystemRoot%\system32\charmap.­exe

(%SystemRoot% is most likely C:\WINDOWS)

[6768883]

you are the best science wiz ever! you simplify most of your labs to give an easy understaning of what you are doing

[smiles76239]

Excellent as usual! You should do a video on hydrogen fuel cells, especially the use of metal hydrides as fuel. Can't wait to see what comes next!

[Basco36]

Interesting!

[derkozten]

As always, a very good one.

Do you have any bibliographic source about this reaction?

[bla287]

@derkozten:

Well, here in Germany, we have the "Holleman-Wiberg", it's something like the chemistry bible ;) The reaction is explained very well there, but I don't know if that book exists in other languages, too.

[derkozten]

I'm a Spanish-speaker (from Colombia), but I read pretty well in English. I assume this book is available in that language.

I have very vague notions of German, not enough to read a complete science book.

[crazyboy0602]

Nice looks strangely like woelen's. As posted by len1 TCCA+HCL makes a better chlorine generator then permanganate. whenever i use TCCA and H2O2 i just get foam and choking chlorine fumes. maybe its not dark enough.

[mabakken]

Yes, the part with TCCA is from woelen's website =)

I also prefer a TCCA chlorine generator, but somehow I always end up using KMnO4 instead :P

[evansp12]

Very nice video. Thanks for sharing it.

[davidkoster]

Nice,is it real if you use KOH instead of NaOH,the color is not the same ?

[bla287]

@davidkoster

Hmm, it should have the same color because it results from the change of singlet to triplet O2. Hypochlorite (which is formed when chlorine reacts with OH-) reacts with peroxide to unstable peroxohypochloric acid (HOOCl), which decays to HCl and singlet O2

2 O2 (singlet) → 2 O2 (triplet) + hν (633.4nm, red)

π* orbitals of O2:

(↑↓)( ) + (↑↓)( ) → ( ↓ )( ↓ ) + ( ↑ )( ↑ )  singlet (3Σg-) triplet (1Δg-)

[bla287]

So it shouldn't make a difference if you use KOH or NaOH, because only the OH- ion matters.

[davidkoster]

Wow,i don't understand all,but thanks for teaching!

[bla287]

Well, I wanted to use reaction formulas to make it clearer, but strangely, Youtube won't allow it...

[FP791]

Easier explanation: the job of KOH and NaOH is to provide a source of -OH ions for CL2 to react with. The -OH ions are the same from both KOH or NaOH and the difference is that K+ vs Na+ will balance hypochlorite's negative charge. You didn't have to go into the different orbital states... stating that wavelength (color) = (plank's constant x speed of light)/Energy(constant difference between orbital state) is enough

[andreichikachika]

as usual, very, very nice!

[cobrasniper555]

Very nice. It's good to see someone like yourself doing these experiments that I haven't heard of yet (still learning...).