Sanja Burazer (Author), Krešimir Molčanov (Author), Ana Šantić (Author), Teodoro Klaser (Author), Emmanuel Wenger (Author), Damir Pajić (Author), Zvonko Jagličić (Author), Jasminka Popović (Author), Marijana Jurić (Author)

Abstract

: A novel one-dimensional (1D) oxalate-bridged coordination polymer of iron(III), {[NH(CH3 ) (C2H5 )2 ][FeCl2 (C2O4 )]}n (1), exhibits remarkable humidity-sensing properties and very high proton conductivity at room temperature (2.70 × 10−4 (Ω·cm)−1 at 298 K under 93% relative humidity), in addition to the independent antiferromagnetic spin chains of iron(III) ions bridged by oxalate groups (J = −7.58(9) cm−1 ). Moreover, the time-dependent measurements show that 1 could maintain a stable proton conductivity for at least 12 h. Charge transport and magnetic properties were investigated by impedance spectroscopy and magnetization measurements, respectively. Compound 1 consists of infinite anionic zig-zag chains [FeCl2 (C2O4 )]n n− and interposed diethylmethylammonium cations (C2H5 )2 (CH3 )NH+ , which act as hydrogen bond donors toward carbonyl oxygen atoms. Extraordinarily, the studied coordination polymer exhibits two reversible phase transitions: from the high-temperature phase HT to the mid-temperature phase MT at T ~213 K and from the mid-temperature phase MT to the low-temperature phase LT at T ~120 K, as revealed by in situ powder and single-crystal X-ray diffraction. All three polymorphs show large linear thermal expansion coefficients.

Keywords

koordinacijski polimeri;protonska prevodnost;detektor vlažnosti",;antiferomagnetna spinska veriga;oxalate-bridged coordination polymers;alkyl ammonium cations;single-crystal-to-singlecrystal transformations;proton conductivity;humidity-sensing property;antiferromagnetic spin chain;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
UDC: 544
COBISS: 124821763 Link will open in a new window
ISSN: 1996-1944
Views: 13
Downloads: 3
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary keywords: koordinacijski polimeri;protonska prevodnost;detektor vlažnosti";antiferomagnetna spinska veriga;
Type (COBISS): Article
Pages: 12 str.
Volume: ǂVol. ǂ14
Issue: ǂiss. ǂ19, art. 5543
Chronology: Oct. 2021
DOI: 10.3390/ma14195543
ID: 16777971