Luminol?

[weeefairy]

A while ago at school I did a lab test with luminol,

 

or to be more exact I made a solution of:

0,2 gram luminol (C8H7N3O2)

180 ml H2O2

10 gram Na2Co3

and 180 ml of water.

 

I had it react with blood and a piece of rusty iron. (so the Fe3+ ions those are I believe.)

 

Now I put myself in the difficult position of having to actually write down the chemical reaction. I can't seem to figure out the reaction myself, and my friends can't really either, I've looked online but I've only found luminol solutions which use other chemicals

I know in theory how chemoluminescence works but that doesn't really seem to help me. I would ask my teacher but it's weekend, and I'd really like to know .

 

Can anyone help me?

 

-edit-

sorry I posted this in inorganic chemistry I realized it goes in organic after making the post, I didn't want to make a double post so can a mod move it please? thank you.

[MulderMan]

This is a representation of the chemiluminescense reaction that happens with Luminol.

 

 

Chemiluminescense only occurs with luminol when it is in a basic aquarious solution so thats what the sodium carbonate is for i guess. The hydrogen peroxide is used as the primary oxidant in the chemiluminescense reaction. Many different metal ions (such as iron) catalyse the whole reaction to increase the oxidation speed, thus light production.

 

Was it just this specific reaction you were interested in, or chemiluminescence in general?

[weeefairy]

Thank you for your reply

I was only curious to this luminol reaction, of course my science paper also includes many more things about luminol aswell as conclusions I have to draw from the lab test I did but I had no problems with that.

 

Sadly the diagram you gave in your post is on many websites, but in many diffrent forms which just make it all horribly confusing especially since sometimes diffrent substances are also included in the reaction shown and things like that.

It makes it hard to know which one to use for the reaction I had in my lab test.

 

Thank you for helping me out though, its now clear to me how the substances react with each other ^^

[MulderMan]

This is a smaller one that is suitable for your reaction, and might be abit more easier to understand, dependant on your level.

 

 

Just submit sodium carbonate as your base, and iron as your catalyst.

 

Hope this helps!

[weeefairy]

Thank you very much for all your help ^^

 

I did understand the last one, but this one is certainly alot easier to write down.

 

Once again, thank you for your help. I was allready a bit afraid as I didn't get it and it is kind of what my whole paper revolves around, but I do understand everything now, and even better I know how to phrase it and write down the reaction now!

 

Thanks

 

p.s. if you wouldnt mind, is it ok if I list you under my sources? after all you have given me some invalueble help here.