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Near-critical water, a cleaner solvent for the synthesis of a metal-organic framework
Authors:
Ilich A.
Ibarra
(University of Nottingham)
,
Peter
Bayliss
(University of Nottingham)
,
Eduardo
Perez
(University of Nottingham)
,
Sihai
Yang
(University of Nottingham)
,
Alexander J.
Blake
(University of Nottingham)
,
Harriott
Nowell
(Diamond Light Source)
,
Martyn
Poliakoff
(University of Nottingham)
,
Martin
Schroeder
(University of Nottingham)
,
David R.
Allan
(Diamond Light Source)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Green Chemistry
State:
Published (Approved)
Published:
November 2011
Diamond Proposal Number(s):
6410
Abstract: The microporous metal–organic framework {[Zn2(L)]·(H2O)3}? (H4L = 1,2,4,5-tetrakis(4-carboxyphenyl)benzene) has been synthesised using near-critical water (300 °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 Å in diameter. The complex shows high thermal stability up to 425 °C by gravimetric thermal analysis, and on desolvation, displays a high adsorption enthalpy of 11.0 kJ mol?1 for H2 uptake at zero coverage, consistent with the narrow pore diameter for the framework.
Journal Keywords: Mof; Clean Solvent; Synthesis; Environment
Diamond Keywords: Hydrogen Storage
Subject Areas:
Chemistry,
Materials,
Energy
Instruments:
I19-Small Molecule Single Crystal Diffraction
Added On:
30/09/2011 20:00
Discipline Tags:
Energy Storage
Energy
Chemistry
Materials Science
Metal-Organic Frameworks
Metallurgy
Organometallic Chemistry
Technical Tags:
Diffraction
Single Crystal X-ray Diffraction (SXRD)