Mapa strony Przejdź do treści

Repozytorium

Wyszukaj

Kolekcje

Inne

Symmetry-breaking phase transitions, dielectric and magnetic properties of pyrrolidinium-tetrahalidocobaltates

Autorzy

Martyna Ksiądzyna

Vasyl Kinzhybalo

Alina Bieńko

Wojciech Medycki

Ryszard Jakubas

Cyril Rajnák

Roman Boča

Andrew Ozarowski

Mykhaylo Ozerov

Anna Piecha-Bisiorek

Rok wydania

2022

Czasopismo

Inorganic Chemistry Frontiers

Numer woluminu

9

Strony

2353-2364

DOI

10.1039/d2qi00187j

Kolekcja

Naukowa

Język

Angielski

Typ publikacji

Artykuł

Streszczenie

We report the physicochemical characteristics of novel Co-based pyrrolidinium analogs: (C4H10N)2CoCl4 (PCC) and (C4H10N)2CoBr4 (PCB). Both compounds consist of a zero-dimensional (0D) anionic network and disordered pyrrolidinium cations. The structural origin of the anomalies observed in the electrical measurements has been confirmed by DSC thermograms and X-ray analysis. The crystals under investigations undergo a complex sequence of phase transitions: PCC at 347/353 K (phase I ↔ phase II) and 202/257 K (II ↔ III) and PCB at 380/381 K (I ↔ II) and 256/302 K (II ↔ III). The molecular motions of cations in both compounds were analysed based on proton magnetic resonance (1H NMR and M2) measurements, while their magnetic properties were investigated in DC and AC modes. The DC data show magnetic anisotropy, which was confirmed by high-field HF EPR measurements. The AC susceptibility data of PCC reveal slow magnetic relaxation at the applied DC field with two relaxation channels. Given the above this organic–inorganic hybrid can be considered as a rare example of multifunctional materials which exhibit dielectric and magnetic activity.

Adres publiczny

http://dx.doi.org/10.1039/d2qi00187j

Strona internetowa wydawcy

https://www.rsc.org/

Podobne publikacje
2019

Symmetry breaking structural phase transitions, dielectric properties and molecular motions of formamidinium cations in 1D and 2D hybrid compounds: (NH2CHNH2)3[Bi2Cl9] and (NH2CHNH2)3[Bi2Br9]

Mencel Klaudia, Starynowicz Przemysław, Siczek Miłosz, Piecha-Bisiorek Anna, Jakubas Ryszard, Medycki Wojciech

2019

Absorption-emission symmetry breaking and the different origins of vibrational structures of the 1Qy and 1Qx electronic transitions of pheophytin a

Rätsep Margus, Linnanto Juha Matti, Muru Renata, Biczysko Małgorzata, Reimers Jeffrey R., Freiberg Arvi

2012

Tris(allylammonium) hexabromobismuthate(III) - crystal structure, phase transitions and thermal, dielectric, vibrational and1H NMR properties over a range of temperatures.

Płowaś Iwona, Białońska Agata, Bator Grażyna , Jakubas Ryszard, Medycki Wojciech, Baran Jan