573950-93-3

Upstream product

• 456-22-4 4-Fluorobenzoic acid 
• 456-06-4 4-fluorobenzoyl hydrazide 
• 403-33-8 methyl 4-flurobenzoate 
• 555-16-8 4-nitrobenzaldehdye 
• 61019-25-8 4-amino-5-(3-fiuorophenyl)-2,4-dihydro-3H-1,2,4-triazole-3-thiol 
• 736084-51-8 N'-(4-fluoro-benzoyl)-hydrazinecarbodithioic acid 

Relevant academic research and scientific papers

A novel 5-mercapto triazole Schiff base as a selective chromogenic chemosensor for Cu2+

A novel colorimetric cation sensor bearing phenol, thiol and HCN groups was designed and synthesized. In a DMSO/H2O (9:1, v/v) solution, the sensor exhibited highly selective recognition of Cu2+ among a range of metal ions tested. In the presence of Cu2+, solutions of the sensor underwent a dramatic color change from colorless to yellow, while the presence of other metal cations such as Zn2+, Pb2+, Cd2+, Ni2+, Co2+, Fe3+, Hg 2+, Ag+ and Ca2+ had no effect on the color. The detection limit of the sensor toward Cu2+ is 8.0 × 10 -7 M and an association constant Ka of 4.3 × 10 5 M-1 was measured. The sensing of Cu2+ by this sensor was found to be reversible, with the Cu2+-induced color being lost upon addition of EDTA.