Syntheses, crystal structures, and solid-state photoluminescence properties of heterotrinuclear Zn2Ln (Ln: La, Sm, Eu, Tb) complexes derived from 1,4-diaminobutane-based N2O4 compartmental ligand

New Heterotrinuclear CuIILnIIICuII (Ln = Ho, Er) Compounds with the Schiff Base: Syntheses, Structural Characterization, Thermal and Magnetic Properties

“…The involvement of the phenolic oxygen atoms in the metal-ligand bonding is confirmed by the strong doublet bands observed at 1251 cm −1 , 1218 cm −1 1 and 1248 cm −1 , 1219 cm −1 2, respectively. The typical absorption band of the ν aryl -O vibration is identified in the free ligand spectrum at 1233 cm −1 [4,13,[38][39][40][41][42][43][44]. All these spectroscopic features are confirmed by the X-ray structures.…”

“…In recent years, much progress in the synthesis and investigation of heteronuclear 3d-4f Schiff base coordination compounds has been observed [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Their crystal structures and properties are determined by several factors, e.g., type of the metal ions, metal-to-ligand stoichiometry, the nature and position of the ligands, methods of synthesis (a stepwise reaction or one-pot reaction, Figure 1), type of solvents, kind of coligands, etc.…”

“…The salen-type Schiff bases are ligands obtained from salicylaldehyde or its derivatives and different diamines. They usually consist of rigid aromatic rings and flexible aliphatic chains [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. In the coordination compounds formed by them, 3d and 4f metal ions are captured simultaneously and linked together through two O phenol atoms.…”

The Crystal Structure and Physicochemical Properties of New Complexes Containing a CuII-LnIII-CuII Core

“…They lead to the obtaining of compounds with different crystal structures and compositions, which are connected to their physio-chemical properties. Moreover, the crystal structures are determined by the type of metal ions used, the nature and position of the ligands, and the methods of the synthesis (a stepwise reaction or a one-pot reaction) [8][9][10][11].…”