Potassium dimer , fluorescence

Kuz menko, N.E., Pirags, I.Ya., Pritkov, S.E., Stolyarov, A.V. and Ferber, R.S. (1987). Determination of strength of electronic transition in B1nu-X1E+ system of potassium dimers 39K2 from intensities of laser-induced fluorescence, Izv. Akad. Nauk Latv. SSR, Ser. Fiz. Tekh. Nauk, 4, 3-10. 

Osuka and Shinmori have studied the aggregation of porphyrin 144 and the meso-meso coupled porphyrin dimer 145 bearing peripheral crown ether moi-eties For 144, the addition of potassium ions in 2/1 CHCI3/CH3CN mixtures induces a blue shift of the B band absorption, from 415 to 395 nm, and a fluorescence quantum yield decrease from 0.022 to 0.004 (reference ZnTPP = 0.03)... 

For analysis of heroin metabolites, reversed-phase chromatography coupled with electrochemical detection is frequently used. Other methods used to improve sensitivity include oxidation to fluorescent pseudomorphine-like dimers using potassium hexa-cyanoferrate(III) and derivatization using a fluorescent chromophore such as dansyl chloride. Detection by MS or tandem MS after separation by LC is... 

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