A colorimetric Schiff base chemosensor for CN- by naked-eye in aqueous solution
A highly selective colorimetric chemosensor 6,6′-((1E,1′E)-hydrazine-1,2-diylidenebis(methanylylidene))bis(2,4-dichlorophenol) (1) based on the combination of hydrazine and 3,5-dichloro-2-hydroxybenzaldehyde was designed and synthesized. Receptor 1 showed
Jo, Hyun Yong,Lee, Seul Ah.,Na, Yu Jeong,Park, Gyeong Jin,Kim, Cheal
A multifunctional Schiff-base as chromogenic chemosensor for Mn2+ and fluorescent chemosensor for Zn2+ in semi-aqueous environment
In this communication, a new multifunctional Schiff-base (S) obtained by reacting hydrazine with 3,5-dichloro-salicylaldehyde. The sensing ability of S was studied with various metal ions by visual test, UV–Vis and spectrofluorometric techniques in THF:H
Raju,Selva Kumar,Tharakeswar,Ashok Kumar
p. 49 - 56
(2019/05/16)
Synthesis of 2-Amino-4-(3-amino-5-hydroxy-4 H -pyrazol-4-ylidene)-4 H -chromene-3-carbonitriles
A simple and efficient protocol was developed for the synthesis of 2-amino-4-(3-amino-5-hydroxy-4H-pyrazol-4-ylidene)-4H-chromene-3-carbonitriles by the potassium phosphate-catalyzed reaction of salicylaldehydes, malononitrile, and 2-cyanoacetohydrazide in ethanol. The method offers advantages such as a simple workup procedure and good yields. When the method was extended to two equivalents of 2-cyanoacetohydrazide instead of malononitrile, the unexpected formation of a salicylaldehyde azine was observed, leading to a novel route for the synthesis of salicylaldehyde azines.
Mane, Mansing M.,Pore, Dattaprasad M.
supporting information
p. 1720 - 1724
(2016/07/06)
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