Heterometallic heptanuclear [Cu5Ln2] (Ln = Tb, Dy, and Ho) single-molecule magnets organized in one-dimensional coordination polymeric network - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Inorganic Chemistry Année : 2017

Heterometallic heptanuclear [Cu5Ln2] (Ln = Tb, Dy, and Ho) single-molecule magnets organized in one-dimensional coordination polymeric network

Résumé

The reaction of a multisite coordination ligand, LH3, with Cu(II) salts and Ln(NO3)3·nH2O in a 1:2:1 stoichiometric ratio in the presence of triethylamine was found to afford a series of one-dimensional heterometallic [{Cu5Ln2(L)2(μ3-OH)4(ClO4)(NO3)3(OH2)5}(ClO4)2(H2O)x]∞ [Ln = Tb(1), Dy(2) and Ho(3), x = 4.25, 5.5, and 5 for 1-3, respectively] coordination polymers. Complexes 1-3 have been characterized by single crystal X-ray crystallography. The detailed study of the magnetic properties has also been performed and compared with the parent [Cu5Ln2] molecular analogues. The ac susceptibility measurements for complexes 1-3 confirm their SMM behavior with the following characteristics: Δeff/kB = 23.4 K, τ0 = 1.1 × 10-6 s and Δeff/kB = 27.9 K, τ0 = 6.6 × 10-7 s under 0 and 1200 Oe dc fields, respectively for 1; Δeff/kB = 8.3 K, τ0 = 3.1 × 10-6 s for 2 under 0 dc field. For 3, the fast QTM below 4 K prevents the estimation of the SMM energy barrier. Remarkably, the magnetic and SMM properties of the previously reported molecular [Cu5Ln2] analogues are preserved after their assembly in these coordination networks.

Domaines

Matériaux
Fichier non déposé

Dates et versions

hal-01666301 , version 1 (18-12-2017)

Identifiants

Citer

Atanu Dey, Sourav Das, Subrata Kundu, Abhishake Mondal, Mathieu Rouzières, et al.. Heterometallic heptanuclear [Cu5Ln2] (Ln = Tb, Dy, and Ho) single-molecule magnets organized in one-dimensional coordination polymeric network. Inorganic Chemistry, 2017, 56 (23), pp.14612-14623. ⟨10.1021/acs.inorgchem.7b02450⟩. ⟨hal-01666301⟩
24 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More