Gholam Babaei Chalmardi, M. Tajbakhsh, A. Bekhradnia
Jun 1, 2017
Citations
0
Influential Citations
19
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract N , N′ -bis(salicylidene)-2-(6-(2-aminophenyl)-4-phenylpyridin-2-yl) ( 3 ) was synthesized by condensation reaction of 2,6-bis(2-aminophenyl)-4-phenylpyridine and 2-hydroxybenzaldehyde in EtOH and characterized by its melting point, 1 H, 13 C NMR and molecular mass. The addition of Cr 3+ ion makes the significant increase of its fluorescent intensity at 537 nm in CH 3 CN/H 2 O (95/5%), however, other metal ions have almost no influence on the fluorescence. The reason for this phenomenon might be attributed to the formation of a 1:1 stoichiometric 3 -Cr 3+ complex which inhibits photo-induced electron transfer (PET) process. The 1:1 binding stoichiometry between 3 and Cr 3+ was established using Job’s plot, and the complex structure was proposed by DFT calculation. The association constant ( K a ) was determined to be 8.77 × 10 4 M −1 and the limit of detection (LOD) was calculated to be 2.2 × 10 −7 M.