Triethanolamine, teaH3, and diethanolamine, RdeaH2, 3d-4f and 4f compounds demonstrate an enormous variety in their structure and bonding. This review examines the synthetic strategies to these molecules and their magnetic properties, whilst trying to assess these ligands' suitability towards new SMMs and magnetic refrigerants.
Keywords: 3d–4f; 4-Me-py, 4-methyl-pyridine; BVS, bond valence sum; CASPT2, complete active space perturbation theory 2; CASSCF, complete active space self consistent field; Coordination chemistry; D, axial anisotropy; Diethanolamine; E, rhombic ZFS; H, applied magnetic field; H2Pc, phthalocyanine; HDVV, Heisenberg Dirac van Vleck; HO2CPh, benzoic acid; HO2CtBu, pivalic acid; Hbta, benzotriazole; J12, coupling constant; JT, Jahn–Teller; Lanthanide; MCE, magnetocaloric effect; Magnetism; Micro-SQUID, micro-superconducting quantum interference device; NMR, nuclear magnetic resonance; QT, quantum tunnelling; RASSI, restricted active space state interaction; RdeaH2, functionalised diethanolamines; SMM, single-molecule magnet; THF, tetrahydrofuran; Triethanolamine; Ueff, anisotropy barrier; ZFS, zero-field splitting; a.c., alternating current; acacH, acetylacetone; bmhH2, 1,2-bis(2-hydroxy-3-methoxybenzylidene)hydrazone; chpH, 6-chloro-2-hydroxy-pyridine; d.c., direct current; edteH4, N,N,N′,N′-tetrakis(2-hydroxyethyl)ethylenediamine; fcdcH2, ferrocene dicarboxylic acid; g, Landé g-value; iPrO, isopropoxide; ib, isobutyrate; kB, Boltzmann constant; mdeaH2, methyldiethanolamine; ms, microstate; mshH, 3-methoxysalicylaldehyde hydrazone; nBudeaH2, n-butyldiethanolamine; nBudeaH3, n-butyldiethanolamine; py, pyridine; sabheaH3, N-salicylidene-2-(bis(2-hydroxyethyl)amino)ethylamine; tacn, 1,4,7-triazacyclononane; teaH3, triethanolamine; tpaH, triphenyl acetic acid; Ŝn, spin operator; ΔTAD, adiabatic temperature change; μβ, electronic Bohr magneton; τ, tau; χ, susceptibility; χT, susceptibility temperature product; χ″, out-of-phase susceptibility; −ΔSM, magnetic entropy change.