Two organoboron based fluorophores pyrazabole and BODIPY have been designed and synthesized by the Pd-catalyzed Sonogashira cross-coupling reaction and successfully employed for fluoride and cyanide ion sensing. Pyrazabole acts as a fluorimetric sensor, whereas BODIPY acts as a fluorimetric as well as colorimetric sensor for fluoride and cyanide ions with ratiometric response. The photophysical...

Light up, light up: The fluorimetric detection of different biomacromolecules is accomplished with 3-(4-N,N-dimethylaminophenylnaphtho[1,2-b]quinolizinium as a fluorescent probe. This molecule shows light-up effect in the presence DNA, RNA and bovine serum albumin (BSA) emission energies, intensities, lifetimes. These effects may be used for differentiation between cell compartments.

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A sensitive and practical colorimetric test for oxidized carbon nanotubes (CNTs) is described. The assay is based on direct labeling with the commercially available fluorescent dye thionin acetate (THA). This strategy offers the possibility for quantitation of acidic sites in a very fast and easy way.

Desenvolveu-se uma metodologia de análise por injeção sequencial (SIA) para a determinação fluorimétrica de quinino em refrigerantes. Dispersão mínima e mistura eficiente foram obtidas aspirando-se 200 mL de amostra entre duas zonas de 100 mL de reagente (0,10 mol L H2SO4) a uma vazão de 250 mL s, usando uma bobina de reação de 50 cm de comprimento (0,8 mm de diâmetro interno). Resposta linear ...