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Kolekcje
Inne
Synthesis, structure, thermal and spectroscopic properties of two new series of cationic Ln(III) complexes of the type [Ln(L)2(bpy)2]BPh4
Autorzy
Rok wydania
2025
Czasopismo
Journal of Molecular Structure
Numer woluminu
1348
Strony
143463/1-143463/10
DOI
10.1016/j.molstruc.2025.143463
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Two new series of cationic lanthanide complexes, namely [Ln(L1)2(bpy)2]BPh4 (Ln1) and [Ln(L2)2(bpy)2]BPh4 (Ln2), where Ln = La, Nd, Eu, Gd, Tb, Lu, HL1 = Cl3C(O)NHP(O)(OCH3)2, HL2 = PhS(O2)NHP(O)(OCH3)2, and bpy is 2,2′-bipyridine, were synthesized. They were studied by elemental analysis, single crystal X-ray diffraction (for Eu1, Tb1, and Eu2), powder X-ray diffraction, thermal analysis, IR, NMR, reflection, absorption, and luminescence spectroscopies. The LnIII in these complexes are eight-coordinate, with a coordination core LnO4N4. The coordination polyhedra can be described as a square antiprism for Eu1, Tb1 or an intermediate between a square antiprism and a triangular dodecahedron for Eu2. The Ln2 complexes were found to be thermally more stable than Ln1. Effective energy transfer from the ligands to the TbIII ion was demonstrated. However, sensitization of EuIII luminescence was less efficient. The f-f luminescence of the europium(III) and terbium(III) complexes is characterized by an emission decay time of 1.70–1.85 ms at 77 and 298 K.
Słowa kluczowe
lanthanide, cationic heteroleptic complexes, carbacylamidophosphate, sulfonylamidophosphate, luminescence, crystal structure
Adres publiczny
http://dx.doi.org/10.1016/j.molstruc.2025.143463
Strona internetowa wydawcy
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