Interplay between the structural and magnetic probes in the elucidation of the structure of a novel 2D layered V_4O_4(OH)_2(O_2CC_6H_4CO_2)_4·DMF

Znanstveni rad - Izvorni znanstveni rad

• Autor: Igor Đerđ
• Autor: Srečo D. Škapin
• Autor: Miran Čeh
• Autor: Zvonko Jagličić
• Autor: Damir Pajić
• Autor: Bojan Kozlevčar
• Autor: Bojan Orel
• Autor: Zorica Crnjak Orel; MBZ: 266564
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

The title compound has been synthesized under solvothermal conditions by reacting vanadium(V) oxytriisopropoxide with terephthalic acid in N,N-dimethylformamide. A combination of synchrotron powder diffraction, infrared spectroscopy, scanning and transmission electron microscopy, thermal and chemical analysis elucidated the chemical, structural and microstructural features of new 2D layered inorganic-organic framework. Due to the low-crystallinity of the final material, its crystal structure has been solved from synchrotron X-ray powder diffraction data using a direct space global optimization technique and subsequent constraint Rietveld refinement. [V_4O_4(OH)_2(O_2CC_6H_4CO_2)_4•DMF] crystallizes in the monoclinic system (space group P2/m (No. 10)); cell parameters: a = 20.923(4), b = 5.963(4), c = 20.425(1)Å, β = 123.70(6)º, V = 2120.1(9)Å^3, Z = 2. The overall structure can be described as an array of parallel 2D layers running along [-101] direction, consisting of two types of vanadium oxidation states and coordination polyhedra: face-shared trigonal prisms (V^4+) and distorted corner-shared square pyramids (V^5+). Both configurations form independent parallel chains oriented along the 2-fold symmetry crystallographic b-axis mutually interlinked with terephthalate ligands in a monodentate mode perpendicular to it. The morphology of the compound exhibits long nanofibers, with the growth direction along the layered [-101] axis. The magnetic susceptibility measurements show that the magnetic properties of V_4O_4(OH)_2(O_2CC_6H_4CO_2)_4•DMF can be described by a linear antiferromagnetic chain model, with the isotropic exchange interaction of J = −75 K between the nearest V^4+ neighbours of S = 1/2.

• Ključne riječi (engleski): inorganic-organic hybrid; structural characterization; magnetic properties
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Završna verzija rukopisa prihvaćena za objavljivanje (postprint)
• Naslov časopisa: Dalton Transactions
• Brojčani podaci: vol. 41, br. 2, str. 581-589
• p-ISSN: 0300-9246
• DOI: https://doi.org/10.1039/C1DT10985E
• URN:NBN: urn:nbn:hr:217:186437
• Datum objave publikacije: 2012
• Projekt: Šifra: 098-0982886-2894; Naziv (hrvatski): Tanki filmovi legura silicija na prijelazu iz amorfne u uređenu strukturu; Voditelj: Davor Gracin; Pravna nadležnost: Hrvatska; Financijer: MZOS; Linija financiranja: ZP
• Projekt: Šifra: 119-1191458-1017; Naziv (hrvatski): Nanomagneti; Voditelj: Krešo Zadro; Pravna nadležnost: Hrvatska; Financijer: MZOS; Linija financiranja: ZP
• URL dokumenta: https://pubs.rsc.org/en/content/articlelanding/2012/DT/C1DT10985E#!divAbstract
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2019-11-15 19:47:15