Multifunctional materials that display different physical properties in a single phase can be utilized in multifunctional devices that are capable of performing more than one task simultaneously. In this study, we synthesized a novel multiple phase transition charge transfer salt [4′-tBu-BzPy][Ni(mnt)2] (4′-tBu-BzPy+ = 4′-tert-butylbenzyl-pyridinium, mnt2− = maleonitriledithiolate) by incorporating a tert-butyl group to control the rotational dynamics in the crystal and to pre-program the amphidynamic [Ni(mnt)2]− magnetic lattice. This salt experienced a two-step structural transformation to give three separate high, immediate and low temperature phases. Interestingly, two structural transformations were coupled to both hysteretic magnetic phase transitions at 187/192 K and 94/96 K, and to dielectric anomalies. These results will assist the design and preparation of novel multiple phase-transition materials harboring technologically important magnetic and dielectric properties.

We synthesized and characterized two magnetically isolated spin ladders, Cu2(CO3)(ClO4)2(NH3)6 (1) and Cu2(CO3)(ClO4)2(H2O)(NH3)5 (2), which are the first examples of carbonate bridging molecular spin ladders. Compounds 1 and 2 form a ladder configuration by stacking a structural unit composed of two Cu2+ ions and one CO32−, where the Cu–O–Cu interactions form the rungs and legs of each ladder and the counter anions (ClO4−) occupy the space between the ladders and ensure their magnetic isolation. A S = 1/2 magnetically isolated spin-ladder model with a ladder-rung magnetic interaction J1/kB = 364 K (where J is defined as positive for antiferromagnetic interactions) and a ladder-leg magnetic interaction J2/kB = 27.4 K accurately predicts the temperature dependence of the molar magnetic susceptibility for 1. The ladder configuration of 2 is similar to that of 1 except that the CO32− is alternately skewed in different directions in the stacked structural unit. Interestingly, this minor structural variation in 2 results in its remarkably different magnetic behavior; the magnetic susceptibility curve of 2 is accurately described by an alternating chain model with J3/kB = 7.26 K and J4/kB = 4.42 K.

Since carrier doping of two-leg spin ladders can theoretically induce a superconductive state, investigation of such systems is of great use in the study of superconductivity. In this paper, we report the successful creation of a non-magnetic impurity doped into a two-leg molecular spin ladder and the characterization of its magnetic properties.

Herein we report the synthesis of α-Dawson type POM, Li6[α-P2W18O62]·28H2O, directly from the use of Li2WO4 as the tungstate source. The salt obtained was soluble not only in water but also in a range of polar and non-polar organic solvents, such as benzene.

Multifunctional materials that display different physical properties in a single phase can be utilized in multifunctional devices that are capable of performing more than one task simultaneously. In this study, we synthesized a novel multiple phase transition charge transfer salt [4′-tBu-BzPy][Ni(mnt)2] (4′-tBu-BzPy+ = 4′-tert-butylbenzyl-pyridinium, mnt2− = maleonitriledithiolate) by incorporating a tert-butyl group to control the rotational dynamics in the crystal and to pre-program the amphidynamic [Ni(mnt)2]− magnetic lattice. This salt experienced a two-step structural transformation to give three separate high, immediate and low temperature phases. Interestingly, two structural transformations were coupled to both hysteretic magnetic phase transitions at 187/192 K and 94/96 K, and to dielectric anomalies. These results will assist the design and preparation of novel multiple phase-transition materials harboring technologically important magnetic and dielectric properties.

Herein we report the synthesis of α-Dawson type POM, Li6[α-P2W18O62]·28H2O, directly from the use of Li2WO4 as the tungstate source. The salt obtained was soluble not only in water but also in a range of polar and non-polar organic solvents, such as benzene.

Since carrier doping of two-leg spin ladders can theoretically induce a superconductive state, investigation of such systems is of great use in the study of superconductivity. In this paper, we report the successful creation of a non-magnetic impurity doped into a two-leg molecular spin ladder and the characterization of its magnetic properties.

We synthesized and characterized two magnetically isolated spin ladders, Cu2(CO3)(ClO4)2(NH3)6 (1) and Cu2(CO3)(ClO4)2(H2O)(NH3)5 (2), which are the first examples of carbonate bridging molecular spin ladders. Compounds 1 and 2 form a ladder configuration by stacking a structural unit composed of two Cu2+ ions and one CO32−, where the Cu–O–Cu interactions form the rungs and legs of each ladder and the counter anions (ClO4−) occupy the space between the ladders and ensure their magnetic isolation. A S = 1/2 magnetically isolated spin-ladder model with a ladder-rung magnetic interaction J1/kB = 364 K (where J is defined as positive for antiferromagnetic interactions) and a ladder-leg magnetic interaction J2/kB = 27.4 K accurately predicts the temperature dependence of the molar magnetic susceptibility for 1. The ladder configuration of 2 is similar to that of 1 except that the CO32− is alternately skewed in different directions in the stacked structural unit. Interestingly, this minor structural variation in 2 results in its remarkably different magnetic behavior; the magnetic susceptibility curve of 2 is accurately described by an alternating chain model with J3/kB = 7.26 K and J4/kB = 4.42 K.