Heterobimetallic 3d–4f Zn(II)–Ln(III) (Ln = Sm, Eu, Tb and Dy) complexes with a N 2 O 4 bisoxime chelate ligand and a simple auxiliary ligand Py: Syntheses, structures and luminescence properties

Structural and Luminescent Properties of Heterobimetallic Zinc(II)-Europium(III) Dimer Constructed from N2O2-Type Bisoxime and Terephthalic Acid

“…The ligand H 2 L exhibited an intense emission peak at ca. 442 nm upon excitation at 352 nm which should be assigned to intra-ligand π-π* transition [69,70]. The Zn II -Eu III complex showed slightly weak photoluminescence with maximum emission at ca.…”

Trinuclear Co(II) and Mononuclear Ni(II) Salamo-Type Bisoxime Coordination Compounds

“…Although the Co(II) atoms are all hexa-coordinated, the coordination sphere of the Co1 atom consists of six oxygen atoms, and that of the Co2 (or Co2 #1 ) atom includes two nitrogen and four oxygen atoms. In coordination compound 1, six pairs of intramolecular hydrogen bond (C2-H2···O2, C8-H8B···O7, C10-H10B···O3, C10-H10B···O6, C16-H16···O5 and C20-H20C···O5) [68] interactions involving one phenoxo oxygen, one coordinated acetone, two acetate ions, and alkoxy O atoms in each molecule (Figure 4) and the weak hydrogen bonds existing in the coordination compound 1 are described in graph sets ( Figure 5) [69], A pair of π⋯π interactions (Cg1⋯Cg2 (Cg1=C1-C2-C3-C4-C5-C6 and Cg2=C12-C13-C14-C15-C16-C17)) ( Figure 6) were formed [70]. In coordination compound 1, six pairs of intramolecular hydrogen bond (C2-H2···O2, C8-H8B···O7, C10-H10B···O3, C10-H10B···O6, C16-H16···O5 and C20-H20C···O5) [68] interactions involving one phenoxo oxygen, one coordinated acetone, two acetate ions, and alkoxy O atoms in each molecule (Figure 4) and the weak hydrogen bonds existing in the coordination compound 1 are described in graph sets ( Figure 5) [69], A pair of π· · · π interactions (Cg1· · · Cg2 (Cg1=C1-C2-C3-C4-C5-C6 and Cg2=C12-C13-C14-C15-C16-C17)) ( Figure 6) were formed [70].…”

“…In coordination compound 1, six pairs of intramolecular hydrogen bond (C2-H2···O2, C8-H8B···O7, C10-H10B···O3, C10-H10B···O6, C16-H16···O5 and C20-H20C···O5) [68] interactions involving one phenoxo oxygen, one coordinated acetone, two acetate ions, and alkoxy O atoms in each molecule (Figure 4) and the weak hydrogen bonds existing in the coordination compound 1 are described in graph sets ( Figure 5) [69], A pair of π⋯π interactions (Cg1⋯Cg2 (Cg1=C1-C2-C3-C4-C5-C6 and Cg2=C12-C13-C14-C15-C16-C17)) ( Figure 6) were formed [70]. …”

Tri- and Mono-Nuclear Zinc(II) Complexes Based on Half- and Mono-Salamo Chelating Ligands

“…As we know, Salen-type ligands (R-CH=N-(CH 2 ) 2 -N=CH-R) and their metal complexes have been extensively investigated in modern coordination chemistry for several decades [1][2][3][4][5], which have been extensively investigated in potential application in biological fields [6][7][8][9][10][11][12][13], electrochemical conducts [14,15], nonlinear optical materials [16][17][18][19][20], magnetic materials [21][22][23][24][25], luminescence properties [26][27][28][29][30][31][32], and supramolecular architecture [33][34][35][36][37], and so on. Chemical modifications of substituent or functional groups in the Salen N 2 O 2 ligands are effective in exchanging the structures or the main functions of complexes, such as salamo ligand, a Salen analogue, (R-CH=N-O-(CH) n -O-N=CH-R) is one of the most versatile ligands and the large electronegativity of oxygen atoms is expected to strongly affect the electronic properties of the N 2 O 2 coordination sphere, which can lead to different and novel structures and properties of the resulting complexes [38].…”

“…Although these salamo-type Zn(II) complexes are currently being studied and developed, the solvent effects on the salamo-type Zn(II) complexes are still very rare. In order to further study the syntheses, crystal structures and fluorescence properties of the Zn(II) complexes with the salamo-type ligands, herein, two new complexes [Zn(L 1 )(EtOH)] (1) and [{Zn(L 2 )(OAc) 2 } 2 Zn]·CHCl 3 (2) with salamo and half-salamo ligands H 2 L 1 and HL 2 have been reported, especially the study of the half-salamo ligand and its complex is reported firstly. Half-salen ligands and their metal complexes have been extensively investigated in modern coordination chemistry for a long time [42,43], but at present, no literature has shown that half-salamo ligands and their metal complexes have been synthesized.…”