Terbium chelate lasers

THe excited-state kinetics of Tb3+ in vapor-phase terbium chelates 62) and terbium aluminum chloride complexes (71, 72 ) have been investigated but no laser action reported. 

A wide variety of fluorescent molecular probes have been demonstrated to be suitable for excitation by the He-Cd laser 4-bromomethyl-7-methoxycoumarln has been employed for the detection of carboxylic and phosphoric acids (44,55), 7-chlorocarbonyl-methoxy-4-methylcoumarln for hydroxyl compounds (42), 7-lsothlocya-nato-4-methylcoumarln for amines and amino acids (55), 7-dlazo-4-methyl-coumarln for a variety of aromatic compounds (55), and terbium chelate molecules with long fluorescence lifetimes ( 1 ms) for protein analysis (56). In this study, we examined the utility of l-dlmethylamlnonaphthalene-5-sulfonyl chloride (dansyl chloride) as a sensitive and selective reagent for the determination of biogenic amines and amino acids. 

---