[Plumbum]

Hi!

I have a question concerning my experiment: flash photolysis.

I had N-Methyldiphenylamin in Cycohexene in my cuvette and room temperature. The cuvette was airtight.

I was wondering, what would O2 do in the reaction? I dont think my cuvette was 100 % airtight, so there might have been a bit O2 which might have influenced the reaction.

And i was also wondering about the temperature. Because my cuvette was often irridiated by the light, that might have heated up the solution?

I need some people with experience here, wold be nice if someone could help

THANK YOU


i

[orgopete]

Please describe how the sample was prepared for the oxygen free reaction.

[Plumbum]

I didn't prepare it. It was already prepared for me in the cuvette.

[phth]

Oxygen is an electron transfer catalyst, so it could cause a problem.  But it depends.  O₂ O₂^·-

[Corribus]

Any time you bombard an aromatic species with light, you will frequently produce some quantity excited triplet states. If oxygen is present, this can photosensitize the production of singlet oxygen, which is a very potent oxidative species. It will not be surprising to see deleterious photochemistry/bleaching under these conditions.

As for heating the solution, it depends on many things, including the light source and the nature of the experimental setup. But probably you will see very little temperature change.

[Plumbum]

I can up to the conclusion that when I have oxygen my molecule can oxidate which lowers the concentration of my molecule. This would slow up the reaction rate when it's a reaction order 1, wouldn't it ?

And also there was light in the room. The molecule decomposed when there is light.