Development of a new fluorimetric bulk optode membrane based on 2,5-thiophenylbis(5-tert-butyl-1,3-benzexazole) for nickel(II) ions

An efficient and selective flourescent optode membrane based on 7-[(5-chloro-8-hydroxy-7-quinolinyl)methyl]-5,6,7,8,9,10-hexahydro-2H-1,13,4,7,10-benzodioxatriazacyclopentadecine-3,11(4H,12H)-dione as a novel fluoroionophore for determination of cobalt(II) ions

“…In recent years, we have prepared a number of fluorimetric bulk optode membranes based on novel fluoroionophores for elective determination of traces of Ag + [12], Ni 2+ [14], Cu 2+ [15] and Hg 2+ [20] ions. In this work, we found that the strong fluorescence of 7-[(5-chloro-8-hydroxy-7-quinolinyl)methyl]-5,6,7,8,9,10-hexahydro-2H-1,13,4,7,10-benzodioxatriazacyclopentadecine-3,11(4H,12H)-dione (L) in a PVC membrane ( ex = 345 nm and em = 516 nm) quenched considerably, and in a selective manner, upon complexation with Co 2+ ion.…”

“…The recognition process by fluoroionophores takes place by their ionophore part which is then converted to a change in the fluorophore's signal, brought about by the perturbation of such photoinduced processes as energy transfer, charge transfer, electron transfer, formation or disappearance of eximers and exciplexes [6,12,13]. In recent years, several fluorescence sensors have been developed for the detection of transition and heavy metal ions including Ag + [12], Ni 2+ [14], Cu 2+ [15,16], Pb 2+ [17,18], Cd 2+ [19], Hg 2+ [20,21] and Fe 3+ [22,23].…”

A Selective Optical Chemosensor Based on a Thia-containing Schiff-Base Iron(III) Complex for Thiocyanate Ion

“…This high selectivity was attributed to the formation of a new adduct between the Fe(III) in the center of the complex and the thiocyanate ion. 12 Thus, based on this selectivity the FepytBrsal compound is expected to act as a selective chromoionophore in the preparation of a PVC-based ion-selective optode for SCN -.…”

A New Optical Sensor for Selective Monitoring of Nickel Ion Based on A Hydrazone Derivative Immobilized on the Triacetyl Cellulose Membrane

“…Optodes are generally used in combination with inexpensive spectrophotometic or spectroflourometic techniques to provide simple and fast determination methods with enhanced selectivity and low detection limits [9][10][11][12][13]. , Hg 2+ and Cu 2+ [14][15][16][17][18][19][20][21][22]. Use of transparent triacetyl cellulose and agarose membranes as supports for preparation of covalently immobilized optical sensors for some ions determination were reported by different laboratories.…”