TY - JOUR
T1 - A novel luminescent optical fibre probe based on immobilized tridentate bis(phosphinic amide)-phosphine oxide for europium(III) ion aqueous detection in situ
AU - Sainz-Gonzalo, F. J.
AU - Elosua, C.
AU - Fernández-Sánchez, J. F.
AU - Popovici, C.
AU - Fernández, I.
AU - Ortiz, F. L.
AU - Arregui, F. J.
AU - Matias, I. R.
AU - Fernández-Gutiérrez, A.
PY - 2012/10
Y1 - 2012/10
N2 - A novel optical fibre probe based on a tridentate bis(phosphinic amide)-phosphine oxide PhPO(C 6H 4POPhN(CH(CH 3) 2) 2) 2 (ligand 1) has been developed for the detection of europium(III) ions in water. The dip coating technique was used to deposit the ligand 1 encapsulated on a poly(vinyl chloride) membrane onto an optical fibre. The optimum deposition thickness of the membrane was 280 ± 40 nm. The sensing mechanism relies on the reaction between europium(III) ion and ligand 1, which produces a strong luminescent complex of stoichiometry 1:2 Eu(III):Ligand 1 with a maximum emission peak around 612 nm. Two different configurations, aerial and aqueous, were tested for measuring the luminescence off-line and on-line, respectively. The proposed probe showed a response time of 92 s in the aqueous configuration (in situ detection of europium(III) ions in water). The luminescence of the proposed probe displayed a power-law response for the europium(III) concentration in a broad range of concentrations of at least 5 orders of magnitude, from 10 nM to 1 mM, with a correlation coefficient (R 2) of the fitted curve better than 0.99.
AB - A novel optical fibre probe based on a tridentate bis(phosphinic amide)-phosphine oxide PhPO(C 6H 4POPhN(CH(CH 3) 2) 2) 2 (ligand 1) has been developed for the detection of europium(III) ions in water. The dip coating technique was used to deposit the ligand 1 encapsulated on a poly(vinyl chloride) membrane onto an optical fibre. The optimum deposition thickness of the membrane was 280 ± 40 nm. The sensing mechanism relies on the reaction between europium(III) ion and ligand 1, which produces a strong luminescent complex of stoichiometry 1:2 Eu(III):Ligand 1 with a maximum emission peak around 612 nm. Two different configurations, aerial and aqueous, were tested for measuring the luminescence off-line and on-line, respectively. The proposed probe showed a response time of 92 s in the aqueous configuration (in situ detection of europium(III) ions in water). The luminescence of the proposed probe displayed a power-law response for the europium(III) concentration in a broad range of concentrations of at least 5 orders of magnitude, from 10 nM to 1 mM, with a correlation coefficient (R 2) of the fitted curve better than 0.99.
KW - Dip coating
KW - Europium(III) ion
KW - Luminescence
KW - Optical fibre
KW - PVC membrane
KW - Tridentate bis(phosphinic amide)-phosphine oxide
UR - https://www.scopus.com/pages/publications/84867037685
U2 - 10.1016/j.snb.2012.07.008
DO - 10.1016/j.snb.2012.07.008
M3 - Article
AN - SCOPUS:84867037685
SN - 0925-4005
VL - 173
SP - 254
EP - 261
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
ER -