Temperature- and pressure-induced phase transitions in the niccolite-type formate framework of [H₃N(CH₃)₄NH₃][Mn₂(HCOO)₆]

Abstract

[H3N(CH3)4NH3][Mn2(HCOO)6] shows ferroelectric and magnetic order below 350 and 9 K, respectively.

Raman‐scattering studies of pressure‐induced phase transitions in perovskite‐like acetamidninium manganese formate

“…They were also predicted theoretically for ethylammonium and guanidinium analogues . Multiferroic properties were also discovered for two iron(II)‐iron(III) mixed valence frameworks of general formula [cat][Fe II Fe III (HCOO) 6 ] (cat = dimethylammonium or diethylammonium) and [NH 3 (CH 2 ) 4 NH 3 ][Mn(HCOO) 6 ] …”

“…The known formates have been extensively studied in a broad temperature range, and these studies showed that majority of them undergo phase transitions associated with orientational ordering of organic cations located in the cavities of the framework . Pressure is another thermodynamic parameter that can help to better understand structure–property relationship in this class of compounds . For instance, it has been shown that application of pressure may lead to enhancement of ferroelectric properties or its suppression .…”

“…[22,23] Multiferroic properties were also discovered for two iron(II)-iron ( 6 ]. [24][25][26] The known formates have been extensively studied in a broad temperature range, and these studies showed that majority of them undergo phase transitions associated with orientational ordering of organic cations located in the cavities of the framework. [1,2,[7][8][9]14,[17][18][19][20][21] Pressure is another thermodynamic parameter that can help to better understand structure-property relationship in this class of compounds.…”

“…[1,2,[7][8][9]14,[17][18][19][20][21] Pressure is another thermodynamic parameter that can help to better understand structure-property relationship in this class of compounds. [19,21,[26][27][28][29][30][31][32][33][34][35] For instance, it has been shown that application of pressure may lead to enhancement of ferroelectric properties [27] or its suppression. [26] Furthermore, application of pressure may lead to discovery of novel polymorphs that are not thermodynamically stable at ambient conditions.…”

Vibrational investigation of pressure‐ and temperature‐induced phase transitions in metal formates templated by ethylammonium ions

“…As a consequence, an investigation of behavior of MOFs in response to this external stimulus is necessary, especially from the application point of view. Up to date, a few papers reported high pressure studies of chiral, perovskite and niccolite metal formate frameworks. These studies revealed presence of pressure‐induced transformations and negative linear compressibility for some compounds.…”