摘要:
                                A new dipodal-triazole-Co2+-ensemble with a ligand containing quinoline moiety was designed and synthesized as a highly sensitive fluorescent sensor for nitrite in aqueous media. Based on in situ-formed Co2+-DTQ (Co2+ chelated dipodal of triazole-quinoline) ensembles having the specific binding affinity for nitrite anions over other anions, this sensory system allows rapid recognition and quantitative detection of nitrite in neutral aqueous media in an 'off-on' fashion. To confirm the suitability of DTQ for biological applications, we also employed it for the fluorescence detection of the changes of intracellular NO2- in three different species of cultured cells in the presence of nitrite ions. (C) 2012 Elsevier Ltd. All rights reserved.