Microporous materials of metal carboxylates

Copper(II) terephthalate absorbs a large amount of gases such as N-2, Ar, O -2, and Xe. The maximum amounts of absorption of gases were 1.8, 1.9, 2.2, and 0.9 mole per mole of the copper(II) salt for N-2, Ar, O-2, and Xe, resp ectively, indicating that the gases were not adsorbed on the surface but oc cluded within the solid. Other microporous copper(II) dicarboxylates are al so reviewed. The porous structure of copper(II) terephthalate, in which the gas is occluded, is deduced from the temperature dependence of magnetic su sceptibilities and the linear structure of terephthalate. Microporous molyb denum(II) and ruthenium(II, III) dicarboxylates are discussed. We describe that rhodium(II) monocarboxylate bridged by pyrazine farm stable micropores by self-assembly of infinite linear chain complexes. (C) 2000 Academic Pre ss.