Cilostazol Determination by the Enhancement of the Green Emission of Tb3+ Optical Sensor

Abstract

The efficiency of excited-state interaction between Tb(3+) and the industrial product Cilostazol (CIL) has been studied in different solvents. High luminescence intensity peak at 545 nm of terbium complex in acetonitrile was obtained. The photophysical properties of the green emissive Tb(3+) complex have been elucidated, the terbium was used as optical sensor for the assessment of CIL in the pharmaceutical tablets and body fluids at pH 3.1 and λ(ex) = 320 nm with a concentration range 1.0 × 10(-9)-1.0 × 10(-6) mol L(-1) of CIL, correlation coefficient of 0.998 and detection limit of 7.5 × 10(-10) mol L(-1).

Spectrofluorometric Determination of Alpha Fetoprotein in different serum samples of Liver Cancer by Tb-acetyl acetone complex embedded in Polymethylmethacrylate optical sensor

“…1). Upon the addition of 1 x 10 -4 mol L -1 of the Tb 3+ ion into ACAC in the PMMA matrix, a red shift was observed in the band by 6 nm; this indicates complex formation between Tb 3+ and ACAC [18][19][20][21][22][23][24][25][26]. The luminescence emission spectra of Tb 3+ in different concentrations of ACAC in the PMMA matrix are shown in Fig.…”

Spectrofluorimetric Assessment of Hydrochlorothiazide Using Optical Sensor Nano-Composite Terbium Ion Doped in Sol-Gel Matrix

“…6 H 2 O in sol-gel matrix was studied under the conditions established above. The results show that there is no quenching in the energy of Tb 3+ -(HCT) in solgel matrix in the presence of acetonitrile [30][31][32][33][39][40][41][42].…”

“…These include electrochemical methods [1], Chemiluminescence methods [2], Capillary Zone Electrophoresis methods [3], Vierordt's method [4], spectrophotometric [4][5][6][7][8][9][10][11][12][13][14][15], HPLC [16][17][18][19][20][21], derivative spectroscopy methods [22][23][24]. High-Performance ThinLayer Chromatography [25], Liquid Chromatographic [25][26][27][28] and Spectral analysis methods [29][30][31][32][33].…”

Gatifloxacin assessment by the Enhancement of the Green Emission of Optical Sensor Tb3+ Doped In Sol-Gel Matrix

“…i. The sol matrix was prepared according to earlier reported work [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] as follow: A mixture consisting of tetraethoxysilane (TEOS), ethanol and water in 1: 5:1 molar ratio was stirred for 15 min. ii.…”

“…After the addition of different concentrations of (GFX) into the Tb 3+ ion doped in sol-gel matrix in acetonitrile, the intensity of the characteristic peak at 545 nm of Tb 3+ was enhanced indicating that (GFX) can form a complex with Tb 3+ ion. The characteristic peaks of Tb 3+ ion appear at ( 5 D 4 → 7 F 6 = 490 nm, 5 D 4 → 7 F 5 = 545 nm, 5 D 4 → 7 F 4 = 590 nm, 5 D 4 → 7 F 3 = 620 nm and 5 D 4 → 7 F 2 = 650 nm), [35,40,42].…”