Solvent coordination in changing dimensionality of lead benzoate coordination polymers
作者:Rupam Sarma、Jubaraj B. Baruah
DOI:10.1016/j.ica.2009.07.032
日期:2009.11
The reaction of lead (II) nitrate with sodium benzoate at low temperature gives one dimensional coordination polymer with composition [Pb(Ben)(2)(MeOH)(2)](n) (where Ben = benzoate, MeOH = methanol). This one dimensional polymer on heating in aqueous solution results in the formation of a two dimensional polymer having composition [Pb(Ben)(2)(H2O)](n). Similar reaction of lead (II) nitrate with 2-methylbenzoic acid in the presence of sodium hydroxide in methanol at low temperature gives a coordination polymer having composition [Pb(o-TOL)(2)(MeOH)(2)](n) (where o-TOL = 2-methylbenzoate); which on re-dissolution in aqueous methanol or keeping in water, at room temperature leads to another coordination polymer having a composition of [Pb(o-TOL)(2)(H2O)](n). (c) 2009 Elsevier B.V. All rights reserved.
A metal–organic framework via the reaction of benzoate with a cationic inorganic material
作者:Claudia H. Swanson、Steven P. Cummings、Martin Grysell、Dat T. Tran、David L. Rogow、Allen G. Oliver、Scott R. J. Oliver
DOI:10.1039/b912874c
日期:——
Our research group previously reported a two-dimensional cationic inorganic material (BING-5, Pb3F5NO3) where nitrate resides in the interlamellar space and can be anion exchanged. Investigation of the possible exchange of nitrate for benzoate led to the discovery of a layered metalâorganic framework, lead benzoate hydrate [Pb(C6H5CO2)2(OH2)]. The compound crystallizes as colourless plates in the monoclinic space group P21/c. The two dimensional leadâoxygen layers contain bridging benzoate oxygen atoms, with bridging water molecules further supporting the layers. The benzoate molecules are positioned perpendicular to the layers and form a hydrophobic bilayer region. The material shows basic character when immersed in various solvents suggesting potential as a base catalyst.