A new Tb3+-selective fluorescent sensor based on 2-(5-(dimethylamino)naphthalen-1-ylsulfonyl)-N-henylhydrazinecarbothioamide.
A novel fluorescent chemosensor 2-(5-(dimethylamino)naphthalen-1-ylsulfonyl)-N-phenylhydrazinecarbothioamide (L) has been synthesized, which revealed an emission of 530 nm and when excited at 360 nm. The fluorescent probe undergoes a fluorescent emission intensity quenching upon binding to terbium ions in MeCN solution. The fluorescence quenching of L is attributed to the 1:1 complex formation between L and Tb(III) which has been utilized as the basis for the selective detection of Tb(III). The linear response range covers a concentration range of Tb(III) from 4.0 x 10(-7) to 1.0 x 10(-5) M and the detection limit is 1.4 x 10(-7) M. The association constant of the 1:1 complex formation for L-Tb(+3) was calculated to be 6.01 x 10(6) M(-1), and the fluorescent probe exhibits high selectivity over other common metal ions mono-, di-, and trivalent cations indicate good selectivity for Tb(III) ions over a large number of interfering cations.
Ganjali
M R
MR
Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran. ganjali@khayam.ut.ac.ir
Veismohammadi
B
B
Hosseini
M
M
Norouzi
P
P
D002412:Cations / Q000737:chemistry; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013449:Sulfonamides / Q000138:chemical synthesis / Q000737:chemistry; D013725:Terbium / Q000032:analysis*; D013882:Thiosemicarbazones / Q000138:chemical synthesis / Q000737:chemistry
C545847:2-(5-(dimethylamino)naphthalen-1-ylsulfonyl)-N-henylhydrazinecarbothioamide; D002412:Cations; D005456:Fluorescent Dyes; D013449:Sulfonamides; D013882:Thiosemicarbazones; D013725:Terbium