Influence of the nitro group on the luminescent and magnetic properties of Yb3+ chelate with dimethyl [(4-nitrophenyl)sulfonyl]amidophosphate

• Published in: Journal of luminescence 2023-12, Vol.264, p.120152, Article 120152
• Main Authors: Lipa, A., Kasprzycka, E., Trush, V.A., Korabik, M., Jerzykiewicz, L., Amirkhanov, V.M., Gawryszewska, P.
• Format: Article
• Language: English
• Subjects: Crystal structure; Luminescence; N-phosphorylated sulfonamide; Nitro group; Single-ion magnet; Ytterbium
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2023.120152

Single crystals of dimethyl [(4-nitrophenyl)sulfonyl]amidophosphate (HL1) and its coordination compounds with Yb3+ and La3+ have been obtained. Their physicochemical properties using X-ray diffraction analysis, absorption (300 K and 5 K), emission (300 K and 77 K) and FTIR spectroscopy, thermogravimetry, differential scanning calorimetry, magnetization measurements have been determined and compared with those of Na[Ln(L2)4], where HL2 = dimethyl (4-methylphenylsulfonyl)amidophosphate Ln = La3+, Yb3+, Gd3+. The effect of substitution of a methyl group at the para position by a nitro group on structural (Yb–O distances, coordination polyhedra, non-covalent interactions, packing), spectroscopic (2F7/2 and 2F5/2 crystal field splitting, radiative lifetime (τrad), emission decay time (τ), intrinsic quantum yield (QYbYb), antenna effect) and magnetic properties in DC and AC fields were analyzed. •HL1 has a non-radiative nature of the relaxation process and Ln3+ does not change it.•ICT levels generated by the presence of NO2 deactivate the ligand-Yb energy transfer.•The nitro group does not quench 2F5/2 Yb3+ emission.•The NO2 group affects the weakening of SIM properties.