Novel quadruple-stranded heterometallic Ln2Na complexes hosting sodium ions inside the cryptand-like cavity. (19th November 2021)

• Record Type: Journal Article
• Authors: Horniichuk, Oleksandr Ye.; Trush, Victor A.; Kariaka, Nataliia S.; Shishkina, Svitlana V.; Dyakonenko, Viktoriya V.; Severinovskaya, Olga V.; Gawryszewska, Paula; Domasevitch, Kostiantyn V.; Watras, Adam; Amirkhanov, Vladimir M.
• Is Part Of: New journal of chemistry. Volume 45:Number 47(2021)
• Page Start: 22361
• Page End: 22368
• Publication Date: 2021-11-19
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d1nj04353f
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The first examples of lanthanide tetrakis-complexes based on bis-chelating carbacylamidophosphate were synthesized and characterized. Abstract : Coordination compounds of lanthanides NEt4 [NaLn2 L4 (H2 O)], Na[NaLn2 L4 (H2 O)]·2H2 O (Ln = La 3+, Nd 3+ ) with the bis-chelating carbacylamidophosphate ligand tetramethyl N, N ′-(2, 2, 3, 3, 4, 4-hexafluoro-1, 5-dioxopentane-1, 5-diyl)bis(phosphoramidate) (H2 L) were obtained for the first time via reactions of Na2 L with lanthanide nitrates. The complexes were characterized by IR and NMR spectroscopy and laser desorption/ionization mass spectrometry. From X-ray diffraction analysis, it was established that the complex anions in the obtained compounds have a structure of a quadruple-stranded helicate, which encapsulates a sodium cation and a molecule of water into the negatively charged environment of the ligand fluorine and carbonyl oxygen atoms. Upon excitation by the 266 nm harmonic line of the Nd:YAG pulsed laser, the NEt4 [NaNd2 L4 (H2 O)] complex exhibits IR-emission at 300 and 77 K with the 4 F3/2 emission lifetime of 2 μs.