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Kolekcje
Inne
Crystal structure and characterization of a novel acentric imidazolium analog [C3N2H5+][Br-].
Autorzy
Rok wydania
2011
Czasopismo
Numer woluminu
503
Strony
134-138
DOI
10.1016/j.cplett.2010.12.083
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
A novel nonlinear optical crystal has been synthesized and characterized by a single-crystal X-ray diffraction, calorimetric, dilatometric and dielectric measurements. Above 200 K the crystal structure is polar, with symmetry R3. It consists of a highly disordered imidazolium cations and discrete anions. The compound reveals a first order phase transition at 199/201 K (cooling/heating cycle) which leads to the monoclinic centrosymmetric space group . The exceptionally large increment of dielectric permittivity accompaning the structure transformation is related to the freezing of cation motions and a significant rebuilding of the anionic substructure.
Adres publiczny
https://doi.org/10.1016/j.cplett.2010.12.083
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