2246-89-1Relevant academic research and scientific papers
Structural characteristics of N,N'-bis(salicylidene)-2,6-pyridinediamine
Galic,Matkovic-Calogovic,Cimerman
, p. 153 - 158 (1997)
The Schiff base N,N'-bis(salicylidene)-2,6-pyridinediamine has been synthesized and characterized in the solid state and in solution using X-ray analysis, IR, UV/Vis and NMR spectroscopy. Crystal data: C19H15N3O2/sub
Synthesis and physicochemical characterization of Schiff bases used as optical sensor for metals detection in water
Garcias-Morales, Cesar,Espinosa Maldonado, Josué,Ariza Castolo, Armando,Perez Berumen, Catalina M.,Lobato, Marco Antonio,Rodriguez, Mario Alejandro,Espinoza Roa, Arian
, (2020/10/23)
In this work, chemical mechanic synthesis of six imines is reported, chemical structure and optical characterization is described. The imines 3a-3f were evaluated as colorimetric chemical sensors of metals: Ba2+, Co2+, Fe2+, Mg2+, Ni2+, Pb2+, Zn2+, Cd2+, Hg2+, Cu2+, Sn2+ and Cs+ where 3e being a highly selective colorimetric chemical sensor for Cu2+. The limit detection of the sensor was determined through the titration, which turned out to be 4.9 × 10?6 M with a Ka of 8.264 × 103 M?1. Also, the interference of detection in a mixture of metals was studied. Finally, by the use of IR, NMR, and DFT calculations, the structure of the 3e + M complex formed, and the phenomenon responsible for the color change was determined. Finally, a possible relationship between the selectivity to metal ions and the HOMO energy levels of the molecules is proposed, being a basis for the design of smart organic sensors
