Sanchez-Portillo, Paola; Hernandez-Sirio, Aime; Godoy-Alcantar, Carolina; Lacroix, Pascal G.; Agarwal, Vivechana; Santillan, Rosa; Barba, Victor published their research in Dyes and Pigments in 2021. The article was titled 《Colorimetric metal ion (II) Sensors Based on imine boronic esters functionalized with pyridine》.Related Products of 534-03-2 The article contains the following contents:
The one-step synthesis of three imine boronic esters functionalized with pyridyl groups is described (1a-1c). The presence or absence of a Me group affects the whole conformation, being bent “”L”” or linear as determined by X-ray crystal diffraction. C-H···O, C-H···N, C-H···F and C-H … π hydrogen bond interactions support 2D supramol. arrangements. Ligands were tested as metal ion (M2+) sensors in solution The addition of metal cations (Fe2+, Co2+ and Cu2+) to 1a using methanol as solvent, showed significant color changes (purple, orange and green, resp.), while for metal cations Ni2+, Zn2+, Cd2+ cations no color changes were observed The sensitivity of compound 1a towards Fe2+, Co2+ and Cu2+ was monitored by UV-Vis spectroscopy, where the presence of Fe2+ produces new bands at 360 and 566 nm. For Co2+ and Cu2+ a remarkable intensity increase was observed at 290 nm band and new bands appear at 340 and 462 nm, resp. The stoichiometry of the complexes 1a-Fe2+, 1a-Co2+ and 1a-Cu2+ was determined by Job′s plots being 1:3 (metal:ligand, complex [Fe (1a)3]2+), in contrast with the stoichiometry 1:1 observed for 1b-Fe2+. In fact, the computed ΔG formation associated value showed a strong stabilization for the complex [Fe (1a)3]2+ (-65.5 kcal/mol) in comparison with the possible complex [Fe (1b)3]2+ (-29.7 kcal/mol). Detection limits are in the mM range (determined by UV-Vis) and μM range (determined by Fluorescence). An analogous bis-bidentate derivative (2a) also shows similar behavior but stoichiometric interaction changes to 2:3 (metal:ligand) and detection limits are in the mM range obtained by UV-Vis and Fluorescence techniques. After reading the article, we found that the author used 2-Aminopropane-1,3-diol(cas: 534-03-2Related Products of 534-03-2)
2-Aminopropane-1,3-diol(cas: 534-03-2) belongs to anime. Left-handed and right-handed forms (mirror-image configurations, known as optical isomers or enantiomers) are possible when all the substituents on the central nitrogen atom are different (i.e., the nitrogen is chiral). With amines, there is extremely rapid inversion in which the two configurations are interconverted.Related Products of 534-03-2
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