Humidity-sensing properties of an 1D antiferromagnetic oxalate-bridged coordination polymer of iron(III) and its temperature-induced structural flexibility

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

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.

• Jezik: Angleški jezik
• Ključne besede: oxalate-bridged coordination polymers, alkyl ammonium cations, single-crystal-to-singlecrystal transformations, proton conductivity, humidity-sensing property, antiferromagnetic spin chain
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 12 str.
• Številčenje: Vol. 14, iss. 19, art. 5543
• PID: 20.500.12556/RUL-142038
• UDK: 544
• ISSN pri članku: 1996-1944
• DOI: 10.3390/ma14195543
• COBISS.SI-ID: 124821763
• Datum objave v RUL: 17.10.2022

Gradivo je del revije

• Naslov: Materials
• Skrajšan naslov: Materials
• Založnik: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 24.09.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: koordinacijski polimeri, protonska prevodnost, detektor vlažnosti", antiferomagnetna spinska veriga

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0348
• Naslov: Nove slikovno-analitske metode