Photoluminescent Mn₄ Single-Molecule Magnet

Abstract

The synthesis of [Mn(4)(anca)(4)(Hmdea)(2)(mdea)(2)].2CHCl(3) (1) is reported along with room temperature fluorescence, UV-vis, and NMR spectra. Direct current magnetization versus field data reveal a S = 8 ground state. Quantized steps in temperature- and field-dependent magnetization versus field hysteresis loops confirm single-molecule magnet behavior.

Tetrathiafulvalene‐amido‐2‐pyridine‐N‐oxide as Efficient Charge‐Transfer Antenna Ligand for the Sensitization of YbIII Luminescence in a Series of Lanthanide Paramagnetic Coordination Complexes

“…[15] The combination and coexistence of both luminescence and magnetism in the same molecule is a new challenge in the study of SMMs and SCMs. [16] In fact, recently, efforts have been made to study SMMs at the single-molecule level by placing them on surfaces.…”

Crystal structure of aqua-1κO-{μ-2-[(2-hydroxyethyl)methylamino]ethanolato-2:1κ4O1,N,O2:O1}[μ-2,2′-(methylimino)diethanolato-1:2κ4O,N,O′:O]dithiocyanato-1κN,2κN-chromium(III)copper(II)

“…Polydentate alkoxido ligands possessing versatile bridging modes were recognized as promising reagents for the synthesis of new heterometallic complexes. In particular diethanolamine and its N-alkyl derivatives are recognized N,O ligands that possess an interesting coordination chemistry and are thus often used for the design of various multimetallic cores and polymeric assemblies (Allen, 2002;Singh & Mehrotra, 2004;Verkade, 1993;Stamatatos et al, 2008;Beedle et al, 2008;Kirillov et al, 2008). Great interest in the synthesis and investigation of polynuclear chromium containing compounds dates from the late 90s, mostly due to the works of Winpenny and co-workers devoted to magnetic studies of high-nuclear cages and wheels (McInnes et al, 2005;Affronte et al, 2005).…”

Magnetic anisotropy in surface-supported single-ion lanthanide complexes

“…Singlemolecule magnets (SMMs) may qualify as such units due to their slow relaxation of the magnetization [7,8]. The most prominent cases of SMMs are multi-core 3d transition metal complexes with a large magnetic moment arising from the exchange-coupled paramagnetic ions [9][10][11][12][13][14]. Metal-organic complexes with only one 3d transitionmetal ion typically do not qualify as SMMs, because they have a small magnetic moment and their anisotropy barrier is too small to allow for stabilizing a magnetic state for sufficiently long timescales.…”