Structural, magnetic and dielectric properties of two novel mixed-valence iron(ii)–iron(iii) metal formate frameworks. Issue 6 (14th January 2016)

• Record Type: Journal Article
• Authors: Mączka, Mirosław; Ciupa, Aneta; Gągor, Anna; Sieradzki, Adam; Pikul, Adam; Ptak, Maciej
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 6(2016)
• Page Start: 1186
• Page End: 1193
• Publication Date: 2016-01-14
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5tc03683f
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Mixed-valence iron(ii )–iron(iii ) formate framework templated by diethylammonium cations exhibit structural and magnetic phase transitions near 240 and 39 K, respectively. Abstract : Two novel mixed-valence iron(ii )–iron(iii ) formate frameworks templated by ethylammonium and diethylammonium cations have been prepared and characterized by DSC, X-ray diffraction and spectroscopic methods. We also report dielectric and magnetic properties of the obtained samples. Both MOFs crystallize in the P 3̄1 c structure and exhibit magnetic order at 39 K. The analogue with diethylammonium cations undergoes a structural phase transition near 240 K into a triclinic phase. This transition has an order–disorder character and it is associated with pronounced dielectric anomaly. This compound is therefore the second discovered mixed-valence metal formate exhibiting multiferroic properties.