Ukrainian Chemistry Journal, Год журнала: 2024, Номер 90(2), С. 67 - 80
Опубликована: Март 29, 2024
In this study, a series of condensed derivatives dehydroacetic acid with chalcone structure were synthesized by the Knevenagel reaction using isopropanol as solvent. The yield was 30–75%. It shown that obtained compounds are capable chelating rare earth metals, including La(III) ions. All complexes have distorted three coordinated ligands according to MALDI MS spectral data. presence water molecules in confirmed thermal study such TG and DTA is dehydration hydroxocomplexes occurs at temperature 120–180 °C, further increase 300–400 °C leads destruction organic release CO2 water. According Horowitz – Metzger method, activation energy process metal ion La(L1)3⋅3H2O complex about 64.2 kJ/mol. optical properties been investigated means UV-Vis spectroscopy measurements, demonstrating induces optically more favourites behaviour compared starting ligands. varying nature substituents length polymethene chain composition acid-based chalcones affects their properties. molar extinction coefficient(ε) values ranged from 2.4 105 L⋅mol-1⋅cm-1 5.5⋅105L⋅mol-1⋅cm-1, suggests strong thedehydroacetic acid-based Further modifications antenna moieties for development highly UV-Visible progress various potential.
Язык: Английский