Lithuanian Journal of Physics article / Lietuvos fizikos žurnalo straipsnis

FORMATION PECULIARITIES OF IRON (III) ACETATE: POTENTIAL PRECURSOR FOR IRON METAL-ORGANIC FRAMEWORKS (MOFs)
Andrius Laurikėnas^a, Jurgis Barkauskas^a, Jonas Reklaitis^b, Gediminas Niaura^c, Dalis Baltrūnas^b, and Aivaras Kareiva^a
^aDepartment of Inorganic Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania
E-mail: andrius.laurikenas@chf.vu.lt
^bInstitute of Physics, Center for Physical Sciences and Technology, Savanorių 231, LT-02300 Vilnius, Lithuania
^cInstitute of Chemistry, Center for Physical Sciences and Technology, A. Goštauto 9, LT-01108 Vilnius, Lithuania

Received 7 September 2015; revised 31 October 2015; accepted 25 March 2016

In this study, iron (III) acetate was synthesized using acetic acid/hydrogen peroxide type synthesis. The obtained material was characterised using thermogravimetric analysis (TG), X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX), infrared (IR) spectroscopy and Mössbauer spectroscopy. The chemical composition, microstructure and properties of iron (III) acetate were investigated and discussed. The results of XRD analysis showed that the synthesized iron (III) acetate is amorphous. The obtained iron (III) acetate is a potential candidate as a precursor for the synthesis of iron metal-organic frameworks (MOFs).

Keywords: TG analysis, SEM, XRD, FTIR spectroscopy, Mössbauer spectroscopy, iron acetate, MOFs
PACS: 81.05.-t, 81.16.Be, 81.20.Ka, 81.90.+c

GELEŽIES (III) ACETATO, POTENCIALIOS PRADINĖS MEDŽIAGOS METALOORGANINĖMS STRUKTŪROMS (MOFs) GAUTI, SINTEZĖS YPATUMAI

Andrius Laurikėnas^a, Jurgis Barkauskas^a, Jonas Reklaitis^b, Gediminas Niaura^c, Dalis Baltrūnas^b, Aivaras Kareiva^a
^aVilniaus universiteto Neorganinės chemijos katedra, Vilnius, Lietuva
^bFizinių ir technologijos mokslų centro Fizikos institutas, Vilnius, Lietuva
^cFizinių ir technologijos mokslų centro Chemijos institutas, Vilnius, Lietuva

Aprašyta, kaip acto rūgšties / vandenilio peroksido metodu susintetintas ir pakartotinai 96,5 % etanolyje iškristalintas geležies (III) acetatas. Susintetinti ir pakartotinai kristalinti pavyzdžiai buvo ištirti termogravimetrinės (TG) analizės, rentgeno spindulių difrakcinės (XRD) analizės, Fourier transformacijos infraraudonosios (FTIR) spektroskopijos, skenuojančios elektroninės mikroskopijos (SEM) ir Mössbauer spektroskopijos metodais. Nustatyta, kad geležies (III) acetato terminis skilimas oro atmosferoje baigiasi ties 320 °C. Ištirtas ir aptartas geležies (III) acetato fazinis grynumas bei kristališkumas. XRD tyrimų rezultatai leido padaryti išvadą, kad susintetintas geležies (III) acetatas buvo iš dalies amorfinis. Susintetintas geležies (III) acetatas buvo sudarytas iš nereguliarių 50–80 μm dydžio strypelių. Tačiau perkristalinus, etanolyje buvo gauti 85–100 μm dydžio plokštuminiai kristalitai. Parodyta, kad taip susintetintas geležies (III) acetatas gali būti sėkmingai panaudotas kaip pradinė medžiaga metalo organinėms struktūroms (MOFs) gauti.

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