SYNTHESIS AND SPECTRAL INVESTIGATIONS OF ANIONIC NaLnL4 AND NEUTRAL MIXED-LIGAND (LnL3phen, LnL3bipy) LANTHANIDE (III) COMPLEXES BASED ON O,O′-DIMETHYL-N-(3-NITROBENZOYL)AMIDOPHOSPHATE: DOI: Https: doi.Org 10.17721 1728-2209.2025.1(60).6. Вісник: Хімія 2025, 60 (1), 39-45.