Repozytorium
Wyszukaj
Kolekcje
Inne
Structure, phase transitions and molecular dynamics in 4-aminopyridinium hexachloroantimonate(V), [4-NH2C5H4NH][SbCl6].
Autorzy
Rok wydania
2006
Czasopismo
Journal of Molecular Structure
Numer woluminu
783
Strony
88-95
DOI
10.1016/j.molstruc.2005.08.005
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
4-Aminopyridinium hexachloroantimonate(V), [4-NH2C5H4NH][SbCl6], abbreviated to 4APCA, crystallizes at room temperature in the monoclinic system, space group P21/c (phase III). The crystal undergoes two reversible phase transitions of first order type at 386/346 K (II↔III) and at 467/466 K (I↔II) on heating–cooling runs. Dielectric studies suggest the plastic crystal's behavior above 386 K (phase II). The proton NMR second moment (M2) and the1H NMR spin-lattice relaxation time (T1) for 4APCA measured between 77 and 420 K revealed the C2 reorientation of the 4-aminopyridinium cations. The mechanism of the phase transitions in 4APCA at 386 K is discussed.
Słowa kluczowe
Phase transition, Chloroantimonate(V), 1H NMR
Adres publiczny
https://doi.org/10.1016/j.molstruc.2005.08.005
Strona internetowa wydawcy
Podobne publikacje
Structure, phase transitions and molecular dynamics in ferroelastic crystal pyrrolidinium hexachloroantimonate(V), [C4H8NH2][SbCl6].
Jakubas Ryszard, Bednarska-Bolek Beata, Zaleski J., Medycki Wojciech, Hołderna-Natkaniec K., Zieliński Piotr, Gałązka Mirosław
Thermal, dielectric and vibrational properties of ferroelastic [(CH3)3PH]3[Sb2Cl9] crystal. Molecular motion of trimethylphosphonium cations studied by proton magnetic resonance.
Wojtaś Maciej, Medycki Wojciech, Baran Jan, Jakubas Ryszard
Thermodynamic properties and molecular motions in ferroelectric (C3N2H5)5Sb2Br11.
Kruk Danuta, Medycki Wojciech, Przesławski Janusz, Dacko Sławomir, Piecha Anna, Jakubas Ryszard