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A novel zinc(II) metal–organic framework with a diamond-like structure: synthesis, study of thermal robustness and gas adsorption properties
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SYSNO ASEP 0455796 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A novel zinc(II) metal–organic framework with a diamond-like structure: synthesis, study of thermal robustness and gas adsorption properties Tvůrce(i) Almáši, M. (CZ)
Zeleňák, V. (CZ)
Zukal, Arnošt (UFCH-W) RID
Kuchár, J. (SK)
Čejka, Jiří (UFCH-W) RID, ORCID, SAIZdroj.dok. Dalton Transactions. - : Royal Society of Chemistry - ISSN 1477-9226
Roč. 45, č. 3 (2016), s. 1233-1242Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova synthesis ; gas adsorption properties ; physical chemistry Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GA14-07101S GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000367614700045 EID SCOPUS 84953897671 DOI 10.1039/C5DT02437D Anotace A solvothermal reaction of Zn(II) salt with methanetetrabenzoic acid (H4MTB) and 1,4,8,11-tetraazacyclotetradecane (cyclam, CYC) created a new microporous metal–organic framework {[Zn2(μ4-MTB)(κ4-CYC)2]·2DMF·7H2O}n (DMF = N,N′-dimethylformamide). Single crystal X-ray diffraction showed that the complex exhibits a four-fold interpenetrated diamond-like structure topology with 1D jar-like channels with sizes about 14.1 × 14.1 and 2.4 × 2.4 Å2. The stability of the framework and activation conditions of the compound have been studied by high-energy powder X-ray diffraction during in situ heating, thermogravimetric analysis coupled with mass spectrometry and infrared spectroscopy performed at different temperatures. The gas adsorption behaviour of {[Zn2(μ4-MTB)(κ4-CYC)2]·2DMF·7H2O}n was studied by adsorption of Ar, N2, CO2 and H2. Nitrogen and argon adsorption showed that the activated sample exhibits Brunauer–Emmet–Teller (BET) specific surface areas of 644 m2 g−1 (N2) and 562 m2 g−1 (Ar). The complex adsorbs carbon dioxide with a maximum storage capacity of 10.5 wt% at 273 K and 101 kPa. The observed hydrogen uptake was 1.27 wt% at 77 K and 800 Torr, which is the highest value reported for the compounds containing a MTB4− linker. The adsorption heats of carbon dioxide and hydrogen, calculated according to the Clausius–Clapeyron equation, were in the range 22.8–22.4 kJ mol−1 for CO2 and 8.9–3.2 kJ mol−1 for H2, indicating weak interactions of the gases with the framework.
Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2017
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