The effect of terminal N-donor aromatic ligands on the sensitization and emission of lanthanide ions in Zn₂Ln (Ln = Eu, Tb) complexes with 4-biphenylcarboxylate anions

Abstract

The systematical series of Zn-Ln trinuclear carboxylate molecular complexes with general formula [Zn2Ln(NO3)(phbz)6(L)2] (Ln = Eu, Gd, Tb; phbz is anion of 4-biphenylcarboxylic acid; L is pyridine, 2,3-lutidine or 2,2’-bipyridine)...

Air‐Stable Solid‐State Photoluminescence Standards for Quantitative Measurements Based on 4′‐Phenyl‐2,2′ : 6′,2′′‐Terpyridine Complexes with Trivalent Lanthanides

“…For their Tb 3+ analogues, they are 28.9(5) %/0.7077(6) ms for 2‐Tb and 23.0(4) %/0.4122(5) ms for 3‐Tb , noticeably lower than for 1‐Tb . The observed lifetimes and quantum yields of the complexes obtained are well comparable to trivalent europium and terbium coordination compounds with efficient sensitiser ligands, [57,72–76] especially with 2,2′ : 6′,2“‐terpyridine derivatives [50,52,55,67] . Simultaneous thermal analyses of 2‐Ln and 3‐Ln are presented in the SI (Figures S17‐S20).…”

Dual emissive Ln(iii)–Ag(i) heterometallic chains based on tris(2-pyridyl)phosphine oxide

“…In recent years, heterometallic coordination compounds have received extensive attention due to their rich structural diversity and fascinating physical properties resulting from the proximity of different metal ions, and, therefore, a wide range of potential applications. [1][2][3][4][5][6][7][8][9] Among them, lanthanide(III)-based heterometallic compounds have attracted special interest owing to their exceptional optical and magnetic properties. Particularly, heterometallic complexes, combining lanthanide(III) and silver(I) ions are rarely reported, synthetically challenging and highly interesting in terms of their photophysical properties.…”

The First Tetranuclear Iron(II)‐Gadolinium(III) Carboxylate Complex [Fe2Gd2(piv)10(bpy)2]: Synthesis, Structure Elucidation and Magnetic Properties

“… [25–30] . Our investigations in this area are aimed to disclose the structure‐properties relationship in the coordination chemistry of heterometallic carboxylates [31–36] including polynuclear heterometallic lanthanide derivatives of the types {M 2 Ln} (e. g., M=Zn, Ln=Tb, Eu; M=Co, Ln=La, Gd; M=Cd, Ln=Sm, Eu, Tb, Dy, Ho, Er, Yb) [37–41] and {M 2 Ln 2 } (e. g., M=Zn, Cd, Ln=La; Eu, Nd, Gd, Tb, Dy; M=Cu, Ln=Gd, Tb, Dy, Ho, Yb) [42–45] supported mainly by different donor ligands: pyridine, [37,40,42] 2,2′‐bipyridine, 1,10‐phenanthroline, [37,40,42–44] triphenylphosphine, [39] N‐heterocyclic carbene [38] . Trinuclear {Co 2 Gd} complexes based on pivalic acid and supported by substituted pyridine ligands were found to demonstrate a ferromagnetic exchange Co II −Gd III ( J Co−Gd =0.15–0.18 cm −1 ) which is only weakly affected by the structural changes depending on the type of pyridine ligand [40] .…”