Felipe Diógenes Abreu

4 Questions 8 Answers 0 Followers

Questions related from Felipe Diógenes Abreu

What is the procedure for determination of singlet oxygen using 1,3-diphenylisobenzofuran (DPBF) by fluorescence in methanol?

I have some questions about assays in the determination of singlet oxygen in the presence of coordination compounds: a. In general this method is reproducible? b. DPBF is sensitive to...

07 June 2014 5,993 0 View

Why does the fluorescence intensity (emission scan experiment) increase after each measurement?

Considering a typical emission scan experiment, why does the intensity increase successively after each measure? PS1: All measurement performed in a solution with constant concentration PS2: Also...

19 March 2014 1,112 6 View

Does anyone know a protocol to clean the sephadex LH-20 column?

I'm trying to purify some ruthenium complexes and the column did not clean! I've tried washing with sodium hypochlorite and solvents in which the compounds are soluble (several times).

19 March 2014 8,333 4 View

What are the best suggestions for an efficient and rapid procedure for amidation?

I'm trying to synthesize amides from a bipyridine (carboxylic acid) and an aromatic amine.

21 February 2014 2,353 8 View