[Discussion] The color problem of ATRP reaction

Oxygen is oxygen. Blue is because the copper is mainly based on a +2 price, and the content of free radicals is very low.

It should be the problem of the proportion of CU and the ligand or the problem of the metamorphosis of CU

Does CUCL have been put too long and have deteriorated.

It is a problem with the amount of PMDETA, and it is easy to turn blue.

The color of the solution after the PMDETA and CU coordinates are determined by the concentration. Blue and yellow -green appear normal. It is not because of the oxygen. There are many reasons for the wide distribution of molecular weight. For example, the method of termination of the reaction is inappropriate.The pre -solvent is delicate and bad, etc. It depends on your specific experimental steps to know

I do water in the water phase is blue

What is your single body?

have water?

Two reactions I do together sometimes have the same color phenomenon, some green and blue, but it seems to have little effect on the degree of aggregation, but I think the color of the color is as the concentration of the reaction system in the reaction system.It is related to the concentration of the concentration of converted into a CU2+. You can try the color difference between the ligand (reasonable amount) of different proportion (reasonable amount) and CUBR in the reaction.The color of the reaction is basically coming from the CU2+mathematical and its free ions. If the amount of ligand changes, it should have a greater impact on the color.What needs to be understood is that the color of the CU2+matches has a lot to do with the type and quantity of the ligand.So I think it may be the amount of the amount of the ligand, the control of the amount of CUBR.

The color of the solution after the PMDETA and CU coordinates are determined by the concentration. Blue and yellow -green appear is normal. It is not because of the oxygen. There are many reasons for the wide distribution of molecular weight.The pre -solvent is delicate and bad, etc. It depends on your specific experimental steps to know

I only used BPY and CUCL to do ATRP