Hi Nasrin,

I found the article I meant to send you earlier. I remembered your question and found it yesterday when I was archiving some older articles. Please see the included article, I think this is what you want to do, right?

Kind regards, Leo

Thank you so much Mr. Vleugels.

Yes it is very helpful, I have read it.

 refer this article, this will be helpful for u ;Spectroscopic study of the dimerization of rhodamine 6G in water and different organic solvents.