53677-97-7Relevant academic research and scientific papers
A highly sensitive and selective turn-on fluorescent probe for sulfite and its application in biological imaging
Song, Jianhua,Zhang, Di,Liu, Yaqi,Zhao, Yufen,Ye, Yong
supporting information, p. 6284 - 6288 (2015/08/06)
A turn-on fluorescein-based probe (1) has been successfully developed for the highly sensitive and selective detection of sulfite. The probe exhibits high SO32- selectivity over other common anions and biothiols (Cys, Hcy and GSH), a
Fast and ratiometric naked eye detection of hydrazine for both solid and vapour phase sensing
Goswami, Shyamaprosad,Paul, Sima,Manna, Abhishek
supporting information, p. 2300 - 2305 (2015/03/18)
A new naked-eye ratiometric colorimetric and fluorometric chemodosimeter (PBF) was constructed to enable trace vapor detection of hydrazine. This probe utilizes an irreversible and fast hydrazine-promoted cleavage of the ester linkage in PBF. This probe was shown to be highly selective for hydrazine, and showed real time response as well as a positive linear relationship to hydrazine concentration. The probe also shows an excellent performance in the dip stick method.
Effect of solvent-water mixtures on the prototropic equilibria of fluorescein and on the spectral properties of the monoanion
Klonis, Nectarios,Sawyer, William H.
, p. 179 - 185 (2007/10/03)
A spectral resolution procedure was used to resolve the absorption, excitation and emission spectra of the fluorescein monoanion in a number of solvent-water mixtures. This permitted an analysis of the effect of the solvent environment on the spectral properties of the monoanion and on the lactone/monoanion/dianion transitions of fluorescein. The monoanion excitation and emission spectra show relatively small changes with changing environment, a behavior that is related to the hydrogen-bonding environment of the solvent-water mixtures. There is also a general increase in the quantum yield of the monoanion from 0.36 in water to values up to 0.49 in the solvent-water mixtures. The presence of solvent also results in a general increase in the lactone content and in the monoanion:dianion and lactone:monoanion ratios. General polarity effects alone cannot account for the observed effects on the prototropic transitions indicating that specific solute-solvent effects involving hydrogen bonding perturb the prototropic equilibria of fluorescein.
Rotating-disc Electrodes. Single- and Double-potential Step Chronoamperometry and the ECE-DISP1 Problem
Compton, Richard G.,Mason, David,Unwin, Patrick R.
, p. 2057 - 2068 (2007/10/02)
The shape and nature of the chronoamperometric transients resulting from double-potential steps at rotating-disc electrodes, when the electrode reaction is of the ECE or DISP1 type, have been considered.It has been shown that such measurements can provide a clear discrimination between these two mechanistic pathways and this conclusion is verified in respect of the reduction of fluorescein in the pH range 9-10, which is shown to involve a DISP1 mechanism, in agreement with other observations.
Rotating-disc Electrodes
Compton, Richard G.,Harland, Richard G.,Unwin, Patrick R.,Waller, Andrew M.
, p. 1261 - 1268 (2007/10/02)
Theory is presented for the shape of current-voltage curves measured at a rotating-disc electrode for the cases where the substrate reacts via either an ECE or a DISP1 process in which the kinetic step is sufficiently fast to allow the use of the reaction-layer concept in the theoretical treatment.When the electrode potential for the electrode reaction can be found under conditions where there are no complications of coupled kinetics, analysis of the shifts in half-wave potential with disc rotation speed allows the deduction of the rate constant for the kinetics of the homogeneous chemical process involved in each mechanism.If an independent measurement of this rate constant is available (e.g. from spectroelectrochemistry) then discrimination between ECE and DISP1 pathway is possible.Experiments involving the reduction of fluorescein in aqueous carbonate/bicarbonate buffers were found to be in good agreement with theory.Furthermore, comparison of the kinetic data with transient electrochemical e.s.r. data revealed the reaction mechanism to be DISP1, in agreement with previous observation.
