Syntheses, structures and magnetic properties of mononuclear, dinuclear and tetranuclear dysprosium(iii) complexes based on azotetrazole-3-hydroxy-2-naphthoic acid

Abstract

A new compound of azotetrazole-3-hydroxy-2-naphthoic acid (H3ATNA) have been successfully synthesized and characterized. By controlling the ratio of metal ion to the ligand and the pH value of solution, three...

LnIII/MnII–LnIII complexes derived from a salicylic azo dye ligand: synthesis, structures, magnetic and fluorescence properties

“…The emission spectral changes may be due to the introduction of Mn ions. Compared with other azo compound ligands, such as H 3 ATNA 69 and H 4 ATB, 70 the Tb/Dy complexes based on H 2 TMSA and H 2 TTMSA displayed the characteristic fluorescence peaks, which proves that the azo o-vanillin ligand is promising to build photo-magnetic dual-functional Ln complexes.…”

Structures and Single-Molecule Magnet Behavior of Dy3 and Dy4 Clusters Constructed by Different Dysprosium(III) Salts

“…Generally, low symmetry can alter the local anisotropy of Dy III ions, which can effectively avoid the cancellation of magnetic anisotropy. 77 The common ring structure of the Dy III center, such as the square grid type, usually exhibits poor magnetic properties owing to the high symmetry, such as [Dy…”

“…To explore the magneto-structural correlations of tetranuclear Dy III -based SMMs, this class of complexes were summarized (Table S13). − The nuclear centers of tetranuclear Dy III complexes have various shapes such as linear, cymbiform, and parallelogram. (Figure ).…”

“…(Figure ). Generally, low symmetry can alter the local anisotropy of Dy III ions, which can effectively avoid the cancellation of magnetic anisotropy . The common ring structure of the Dy III center, such as the square grid type, usually exhibits poor magnetic properties owing to the high symmetry, such as [Dy 4 (μ 4 –O)L 2 (HL) 2 (CH 3 O) 4 ]·4CH 3 OH·H 2 O, [Dy 4 (L) 4 (μ 2 -CH 3 O) 4 ]·CH 3 OH, [Dy 4 (L 1 ) 4 (μ 2 –OH) 4 ]·4ClO 4 – , and [Dy 4 (L 2 ) 2 (μ 3 –OH) 2 (NO 3 ) 4 (EtOH) 2 ]·2CH 3 CN. ,, Herein, the configurations of complexes with approximately parallelogram Dy III centers are analyzed in depth.…”

Solvent effect on the structures of three manganese complexes based on azotetrazole-3-hydroxy-2-naphthoic acid: synthesis, structures, and magnetic and fluorescent properties

“…Taking this into consideration, tetrazole and its derivatives, which possess multiple coordination modes, can act as preeminent candidates. 49–51 In this study, we synthesized a tetrazole derivative ligand, namely azotetrazole-3-hydroxy-2-naphthoic acid (H 3 ATNA) (Scheme 1), and obtained three Mn complexes by changing the solvents: Mn 2 (HATNA) 2 (CH 3 OH) 4 ( 1 ), {[Mn 3 (ATNA) 2 (DMF) 2 (H 2 O) 2 ]·0.5DMF·0.5H 2 O} n ( 2 , DMF = N , N -dimethylformamide), {[Mn 6 (ATNA) 4 (H 2 O) 10 ]·8DMSO·2.5H 2 O} n and ( 3 , DMSO = dimethyl sulphoxide). Complex 1 possessed a dinuclear structure with two Mn( ii ) ions that were doubly bridged through N–N linkers from the two tetrazole rings.…”