High-spin Co(II) in monomeric and exchange coupled oligomeric structures: Magnetic and magnetic circular dichroism investigations

Use of magnetic circular dichroism to study dinuclear metallohydrolases and the corresponding biomimetics

“…MCD and/or magnetic susceptibility studies of additional µ-1,3-carboxylato, µ-aqua dicobalt(II) complexes have been reported (Schultz et al 1997;Ostrovsky et al 2009). For these complexes, magnetic exchange coupling is always weakly antiferromagnetic or zero.…”

“…Several MCD studies of dinuclear complexes, which serve as structural and spectroscopic models of dinuclear hydrolases, have been reported in recent years (Ostrovsky et al 2006;Johansson et al 2008;Larrabee et al 2008Larrabee et al , 2009Xavier et al 2009;Ostrovsky et al 2009;Daumann et al 2013Daumann et al , 2014. Most of these studies have focussed on dicobalt complexes; the exceptions were Fe(III)Co(II) and Ga(III)Co(II) complexes (Xavier et al 2009).…”

Two W/Mo complexes containing 2,3-dihydroxynaphthalene: synthesis and structure analysis

“…X-ray analysis has shown that the active structure factors of the corresponding transfer-enzymes are coordinated by the metal (W/Mo) and the sulfur of dithiolene [10,11]. Monomeric complexes containing oxo-ligands exhibit diverse compositions and significant structural versatility [12][13][14][15][16][17]. Herein, we synthesized two complexes, in which W/Mo coordinated with 2,3-DHN forming the core structures, possibly simulating the corresponding tungstoenzyme cofactor and molybdoenzyme cofactor.…”

Octacyanotungstate (V)-based square [W2Mn2] complexes: Effect of intermolecular interaction on molecule-based magnetism

“…However, in some aspects of magnetism, scientists could not completely correlate the macroscopic magnetic properties with microlevel structure. In fact, most of the researches on magnetic properties nowadays focus on the intrinsic properties of the molecule itself such as intramolecular magnetic coupling [2,3] and properties depending on the different metal ions [4,5], but ignore the influence of magnetic behavior caused by external surroundings of a magnetic molecule, namely the micro-environment around the molecule. However, the micro-environment and intermolecular interactions are very important for magnetic properties [6].…”