196503-17-0Relevant academic research and scientific papers
Selective fluorescence assay of aluminum and cyanide ions using chemosensor containing naphthol
Kim, Soojin,Noh, Jin Young,Park, Sol Ji,Na, Yu Jeong,Hwang, In Hong,Min, Jisook,Kim, Cheal,Kim, Jinheung
, p. 18094 - 18099 (2014)
The selective assay of aluminum and cyanide ions is reported using fluorescence enhancement and quenching of a phenol-naphthol based chemosensor (PNI) in aqueous and nonaqueous solvents, respectively. PNI gave no significant fluorescence in water. The binding properties of PNI with metal ions were investigated by UV-vis, fluorescence, and electrospray ionization mass spectrometry in a Bis-Tris buffer solution. The addition of aluminum ions switches on the fluorescence of the sensor PNI in water, comparable to relatively very low fluorescence changes in the presence of various other metal ions. The complex stability constant (Ka) for the stoichiometric 1:1 complexation of PNI with aluminium ions was obtained by fluorimetric titrations and NMR experiments. However, upon treatment with cyanide ions, the fluorescence of PNI was selectively turned off and the yellow solution of PNI turned to red in methanol. Other comparable anions, such as F-, Cl-, Br-, I-, CH3COO-, and H 2PO4-, afforded no apparent fluorescence quenching. The interaction of PNI with cyanide ions was studied by NMR experiments.
A novel approach toward the synthesis of some new tridentate Schiff bases from anil-like compounds
Bagheri, Fatemeh,Olyaei, Abolfazl
, p. 1111 - 1119 (2016/11/09)
A novel method was developed for synthesizing a series of new tridentate Schiff base ligands starting from hydroxynaphthyl pyrimidinyl amines with o-phenylenediamines or o-aminophenol or 2-amino-3-hydroxy-pyridine in the presence of formic acid catalyst under solvent-free conditions. In these reactions [1+1], the condensation product as half-unit ligand was obtained. Moreover, the reaction of hydroxynaphthylmethylene pyrimidinyl amines with 3,4-diaminopyridine and 1,8-naphthalenediamine leads to the formation of C2-naphthylated imidazopyridine and dihydropyrimidine, respectively. The attractive features of this protocol are use of an inexpensive catalyst, operational simplicity, short reaction times, easy handling, and good yields.
