ic7b00388_si_001.pdf (2.27 MB)
Download fileDinuclear Coordination Compounds Based on a 5‑Nitropicolinic Carboxylate Ligand with Single-Molecule Magnet Behavior
journal contribution
posted on 2017-07-21, 16:18 authored by Álvaro Raya-Barón, Itziar Oyarzabal, Francisco M. Arrabal-Campos, José Manuel Seco, Antonio Rodríguez-Diéguez, Ignacio FernándezIsostructural
dinuclear dysprosium and yttrium coordination compounds based on the
5-nitropicolinic carboxylate ligand were synthesized and characterized.
The formation of these air-stable complexes is achieved via solvothermal
routes employing water as the reaction solvent. The dysprosium-based
complex exhibits single-molecule magnet behavior with frequency dependence
of the out-of-phase susceptibility at zero direct-current field. High-resolution
mass spectrometry (electrospray ionization) experiments and advanced
NMR methods including diffusion NMR techniques were applied on the
diamagnetic yttrium analogue and established that these species retained
their solid-state structure in solution with hydrodynamic radii of
6.5 Å. Full 1H, 13C, 15N, 89Y, Δ1Hcoord, Δ13Ccoord, and Δ15Ncoord NMR
data are given, and through the analysis of the Ramsey equation, the
first electronic insights of these derivatives are provided.
History
Usage metrics
Categories
Keywords
yttrium coordination compoundsΔ 1 H coord13 C89 YΔ 13 C coord5- nitropicolinic carboxylate liganddiffusion NMR techniquesHigh-resolution mass spectrometryexhibits single-molecule magnet behaviordiamagnetic yttrium analogueDinuclear Coordination Compoundssolvothermal routesNMR methodsRamsey equationΔ 15 N coord NMR dataSingle-Molecule Magnet Behavior Isostructural dinuclear dysprosium1 H6.5 Å.air-stable complexes15 Nelectrospray ionizationdirect-current fieldout-of-phase susceptibilityhydrodynamic radiifrequency dependence