Journal
GREEN CHEMISTRY
Volume 14, Issue 1, Pages 117-122Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1gc15726d
Keywords
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Funding
- EPSRC
- University of Nottingham
- ERC
- CONACYT Mexico
- University of Nottingham/EPSRC
- EPSRC [EP/I011870/1, EP/I020942/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I020942/1, EP/I011870/1, EP/C528964/1] Funding Source: researchfish
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The microporous metal-organic framework {[Zn-2(L)]center dot(H2O)(3)}(infinity) (H4L = 1,2,4,5-tetrakis(4-carboxyphenyl)benzene) has been synthesised using near-critical water (300 degrees C) as a cleaner alternative to toxic organic solvents. A single crystal X-ray structure determination confirms that the complex incorporates tetrahedral Zn(II) centres bridged through the carboxylate anions to form a binuclear building block, which extends into a one dimensional chain along the c axis. Four L4- ligands bind to each Zn(II) centre and cross-link the one dimensional chains along both a and b axes to afford a three dimensional network structure incorporating pores of ca. 4.3 angstrom in diameter. The complex shows high thermal stability up to 425 degrees C by gravimetric thermal analysis, and on desolvation, displays a high adsorption enthalpy of 11.0 kJ mol(-1) for H-2 uptake at zero coverage, consistent with the narrow pore diameter for the framework.
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