Phenalenyl-based mononuclear dysprosium complexes

Abstract

SummaryThe phenalenyl-based dysprosium complexes [Dy(PLN)2(HPLN)Cl(EtOH)] (1), [Dy(PLN)3(HPLN)]·[Dy(PLN)3(EtOH)]·2EtOH (2) and [Dy(PLN)3(H2O)2]·H2O (3), HPLN being 9-hydroxy-1H-phenalen-1-one, have been synthesized. All compounds were fully characterized by means of single crystal X-ray analysis, paramagnetic 1H NMR, MALDI-TOF mass spectrometry, UV–vis spectrophotometry and magnetic measurements. Both static (dc) and dynamic (ac) magnetic properties of these complexes have been investigated, showing slow relaxation of magnetization, indicative of single molecule magnet (SMM) behavior. Attempts to synthesize sublimable phenalenyl-based dysprosium complexes have been made by implementing a synthetic strategy under anhydrous conditions. The sublimed species were characterized and their thermal stability was confirmed. This opens up the possibility to deposit phenalenyl-based lanthanides complexes by sublimation onto surfaces, an important prerequisite for ongoing studies in molecular spintronics.

Biological fabrication of cellulose fibers with tailored properties

“…3H, red) and a product magnetic susceptibility of 14.12 cm 3 K mol −1 at 300 K, decreasing to 10.97 cm 3 K mol −1 at 2 K (fig. S18) because of thermal depopulation of the Stark sublevels of the Dy(III) ground state (27). In contrast, the raw fibers showed a diamagnetic behavior (negative magnetic moment) throughout the full temperature range (Fig.…”

Future Perspectives on Biological Fabrication and Material Farming

“…The synthesis of these compounds and their magnetic properties is well established. [27][28][29] Following our previous rationale and requirements for designing molecules that could be biologically integrated into the cellulose cotton fibers, we devised a synthetic route to combine the glucosamine (our carrier) with a macrocycle known to cage lanthanides. This macrocycle comprises hanging carboxylate groups and nitrogen atoms that complex the lanthanides.…”

FeIII, CuII and ZnII Complexes of the Rigid 9-Oxido-phenalenone Ligand—Spectroscopy, Electrochemistry, and Cytotoxic Properties

“…Early reports on opo complexes of Mn II , Fe III , Co II , Ni II , Cu II , Zn II , and UO 2 2+ do not contain detailed characterisations or applications [ 21 , 22 , 23 ]. A number of main-group metal complexes containing B III [ 11 , 12 , 13 , 14 , 15 , 16 ], Si IV [ 24 ], Ge IV [ 24 ], Be II [ 11 , 21 ], or Al III [ 21 , 25 ] or the f-elements Nd III [ 25 , 26 ], Eu III [ 25 , 26 , 27 ], Dy III [ 25 , 28 ], Er III [ 25 , 26 ], and Yb III [ 25 , 26 ] were studied till 2010, the latter with interesting luminescence properties.…”