Coordination compounds based on CAPh type ligand: synthesis, structural characteristics and luminescence properties of tetrakis-complexes CsLnL₄ with dimethylbenzoylamidophosphate

Eu3+ and Tb3+ coordination compounds with phenyl-containing carbacylamidophosphates: comparison with selected Ln3+ β-diketonates

“…Such compounds are formed by the self-assembly principle—the cationic counterparts should coincide by size and/or create short contact with the ligand to form the coordination compound of the mentioned type. By using such cations as sodium, caesium, tetraethylammonium, and tetraphenyl phosphonium, the following coordination compounds have been obtained based on HL 1-3 ligands: Cs[LnL 1 ] 4 , NEt 4 [LnL 1 ] 4 , NEt 4 [LnL 3 ] 4 , and PPh 4 [LnL 3 ] 4 ( Kariaka et al, 2016a ; Kariaka et al, 2017 ; Kariaka et al, 2018 ; Kariaka et al, 2022 ).…”

“…So far, only a few studies have investigated the luminescence properties of Eu 3+ and Tb 3+ coordination compounds with CAPh ligands. These studies include investigations on the luminescence of compounds with general compositions of Cat[LnL 4 ]·xH 2 O ( Amirkhanov et al, 1996 ; Sokolnicki et al, 1999 ; Tang et al, 2014 ; Kariaka et al, 2016a ; Kariaka et al, 2017 ; Kariaka et al, 2018 ; Kariaka et al, 2022 ), [LnCl 3 (HL) 3 ] and [Ln(NO 3 ) 3 (HL) 3 ] ( Legendziewicz et al, 2000 ; Legendziewicz et al, 2001 ; Znovyak et al, 2009 ; Kariaka et al, 2016b ), [LnL 3 Q] (Q = H 2 O, 2-propanol, 2,2-bipyridine, 1,10-phenanthroline, TPPO, 2-(1,3,4-oxadiazole-2-yl) pyridine) ( Legendziewicz et al, 2001 ; Borzechowska et al, 2002 ; Oczko et al, 2003 ; Puchalska et al, 2008 ; Znovyak et al, 2009 ; Kariaka et al, 2014 ; Tang et al, 2014 ; Litsis et al, 2015 ; Kariaka et al, 2016b ; Kariaka et al, 2016c ; Nakajima et al, 2016 ; Yakovlev et al, 2018 ; Kariaka et al, 2020 ), [Na 2 LnL 4 (OTf)(DMF)] ( Pham et al, 2020 ), Ln 5 L 10 (OH) 5 ( Kariaka et al, 2016d ), binuclear Ln 2 L 3 phen 2 ( Horniichuk et al, 2021 ), and [Eu 2 (L) 2 (μ-Ph 2 POO) 2 (κ-OP(O)Ph 2 ) 2 (CH 3 OH) 2 ] ( Pham et al, 2017 ). Some of these studies have also measured the luminescence decay lifetimes and emission quantum yields (overall and intrinsic), as shown in Table 4 .…”

Synthesis and Characterization of Anionic Lanthanide(III) Complexes with a Bidentate Sulfonylamidophosphate (SAPh) Ligand

“…In the emission spectrum of 1-Eu , three peaks observed for the 5 D 0 → 7 F 1 transition and one peak observed for the 5 D 0 → 7 F 2 transition may suggest a distorted D 4 d symmetry . Such a high symmetry of the europium­(III) ion environment is not typical for known CAPh- and SAPh-based tetrakis complexes, for which the red/orange ratio lies in the range 3–9. − The band of the 5 D 0 → 7 F 4 transition dominates in the spectra under study, which is not typical for europium coordination compounds, and has never been observed before for SAPh-based europium­(III) complexes. However, for CAPh-based europium­(III) complexes, some luminescent spectra with a high intensity of the 5 D 0 → 7 F 4 transition were reported recently. ,, Such an abnormally high intensity observed for the 5 D 0 → 7 F 4 transition is a consequence of the behavior of the Ω λ intensity parameters in a highly polarizable chemical environment with local symmetry, corresponding to a coordination polyhedron that is slightly distorted from D 4 d . , The 1-Eu complex also exhibited 5 D 1 emission, as displayed in Figure S2.…”

“…However, for CAPh-based europium(III) complexes, some luminescent spectra with a high intensity of the 5 D 0 → 7 F 4 transition were reported recently. 39,41,42 Such an abnormally high intensity observed for the 5 D 0 → 7 F 4 transition is a consequence of the behavior of the Ω λ intensity parameters in a highly polarizable chemical environment with local symmetry, corresponding to a coordination polyhedron that is slightly distorted from D 4d . 43,44 The 1-Eu complex also exhibited 5 D 1 emission, as displayed in Figure S2.…”

Synthesis and Spectral Investigation of Anionic Tetrakis-Complexes of Rare Earth Elements With Dimethyl-N-Trihloracetylamidophosphate and Tetraphenylphosphonium Cation

“…Смуги поглинання в області 430-440 нм були віднесені до переходів із заселених за кімнатної температури підрівнів терму 4 I9/2 [11]. Вигляд тонкої структури в ділянці надчутливого переходу 4 I9/2→ 4 G5/2, 2 G7/2 у спектрах синтезованих комп лексів є характерним для координаційного числа 8 [12].…”