Chiral 1D Dy(iii) compound showing slow magnetic relaxation

Abstract

Herein, we present one chiral Dy(III) compound, namely Dy(L)(3)(1, HL = 2-methylbenzoic acid), synthesized from the achiral HL ligand. Within 1, along a direction the seven-coordinated Dy(III) ion are bridged by double L carboxylate and single L oxygen to give rise to the 1D helical chain. The magnetic studies suggest small intra-chain ferromagnetic interactions. Alternating current (AC) magnetic measurements show a frequency dependence of magnetic susceptibilities in both in-phase, χ', and out-of-phase, χ''. However, no obvious peak can be found even under 1000 Oe static field, suggesting the prevalence of quantum tunnelling effect at low temperature.

A Co(ii) thiocyanato coordination polymer with 4-(3-phenylpropyl)pyridine: the influence of the co-ligand on the magnetic properties

“…Because such materials are of general scientific interest and additionally have some potential for future application, an increasing number of such compounds with different cationic, anionic and neutral co-ligands have recently been reported. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] In this context also thio-or selenocyanato anions can be used for the preparation of magnetic coordination compounds and polymers; some selected examples are given in the reference list. [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52] We have reported as well on several such compounds with the composition [M(NCS) 2 (L) 2 ] n (M = Fe(II), Co(II); L = monodentate co-ligand) and [M(NCS) 2 (L)] n (M = Fe(II), Co(II); L′ = bridging co-ligand), with some of them showing magnetic relaxations, indicative of SCM behavior.…”

Manganese(II), Iron(II), and Mixed-Metal Metal–Organic Frameworks Based on Chains with Mixed Carboxylate and Azide Bridges: Magnetic Coupling and Slow Relaxation

“…A limited but increasing number of homospin SCMs have emerged in recent years, mainly involving Co II or Mn III as anisotropic spin carriers with azide, carboxylate, or phosphonate as bridging groups. Homospin SCMs with other metal ions (such as Fe II and Dy III ) or other bridges (such as tetrazolate and even π–π interactions) are also known but still rare. − …”

Neodymium 1D systems: targeting new sources for field-induced slow magnetization relaxation

“…6 So far, many of the SCMs reported in the literature are derived from 3d ions, 7 mixed 3d-4f ions 8 or pre-formed bridged 3d SMMs. 9 Much recently, homometallic 4f SCMs 10 have been presented with special interest, toward the creation of new magnetic materials, 11 due to the large anisotropic values of lanthanide carriers (mainly because of their strong spin-orbit contributions) and their moderate magnetic exchange couplings. 12 Everything considered, homometallic 4f SCMs deserve further experimental and theoretical studies.…”