Fluorescence spectra of alkaline earth derivatives of azo compounds

Compounds with two dissimilar chelating centers

“…In the effort to exploit o,o'-dihydroxyazobenzene as an analytical reagent, H. Diehl et al (10) found that the magnesium derivative was fluorescent. An excellent method was then developed for the fluorometric determination of micro amounts of magnesium in the presence of calcium (10) o,o'-Dihydroxyazobenzene, melting point: 174°, was pre pared according to the procedure outlined by R. Olsen (17).…”