((R)-(−)-3-Hydroxyquinuclidium)[FeCl₄]; a plastic hybrid compound with chirality, ferroelectricity and long range magnetic ordering

Abstract

Quinuclidinium salts and their derivatives are now in the focus of material science as building units of multifunctional materials. Their properties can be easily switchable, allowing their use in a...

Development of a magnetic hybrid material capable of photoinduced phase separation of iron chloride by shape memory and photolithography

“…Several mechanisms have been proposed to improve the magnetic susceptibility of Fe complexes by structural control, including reduction of the Fe( iii )–Fe( iii ) distance. 55–57 The range of Fe( iii )–Fe( iii ) distances that affect magnetic susceptibility are estimated to be in Å units. Here, structures created were in the μm scale, and the coupling effect of Fe( iii )–Fe( iii ) was not caused by structure, but by proximity of FeCl 3 , compressed in single units of microstructure.…”

Tailoring the physical properties of hybrid magnetic quinuclidine-based plastic compoundsviaweak interactions

“…Especially interesting effects are due to homochirality, like in the case of ((R and S)-(+ −)-3˗Me-H 2 dabco)[TFSA] 2 (TFSA=bis(trifluoromethylsulfonylammonium)); homochiral ferroelectric compounds which show a large number of crystal phase transitions and a T c about 400 K higher than the one detected in [H 2 dabco][TFSA] 2 . 18 Other examples are the ((R)-(−)-3-hydroxyquinuclidium)[FeCl 4 ], 19 a plastic hybrid compound with chirality, ferroelectricity and long-range magnetic ordering, or ((R and S)-(+ −)-3-C 4 H 9 N))[CdCl 3 ] compound, a prirrolidine magnetic hybrid material with ferroelectric phase transition from C222 1 to P2 1 , with a significantly higher Curie temperature than the parent compound (C 4 H 10 N))[CdCl 3 ]. 20 Among these materials, those including paramagnetic ions give rise to magnetic hybrid materials, which are applied as components in many technologies, such as memory storage devices, electro-magnets or sensors.…”

Piezoelectric Response of Plastic Ionic Molecular Crystals: Role of Molecular Rotation

“…C[NH 2 ] 3 -compounds. They all consist of one organic cation per inorganic anion and are quite representative of the broad range of ferroelectric ionic plastic crystal compositions that have emerged in recent years [34,[66][67][68][69][70][71][72]. The quinuclidinium and dabco compounds have globular organic cations and tetrahedral anions, where the central atom is coordinated by oxygen.…”