439607-35-9Relevant articles and documents
Luminescence lifetime-based sensor for cyanide and related anions
Anzenbacher Jr., Pavel,Tyson, Daniel S.,Jursikova, Karolina,Castellano, Felix N.
, p. 6232 - 6233 (2002)
A new Ru(II) complex is described which serves as a luminescence lifetime-based sensor for fluoride and cyanide anions (KF = 640 000 mol-1, KCN = 430 000 mol-1). This chromophore displays observable changes in its UV-vis and steady-state luminescence spectra upon cyanide binding. Prior to cyanide addition, this complex exhibits a single-exponential lifetime (τ = 377 ± 20 ns). With increasing cyanide concentrations, the intensity decays are composed of two exponentials: long τ (320-370 ns) and short τ (13-17 ns). The average lifetimes shorten as a function of cyanide concentration since the fractional intensity shifts from an initial dominant long lifetime component to the short lifetime component. This work represents the first example of a direct method for the luminescence lifetime-based sensing of anions. Copyright