Synthesis, characterisation and adsorption properties of a porous copper(ii) 3D coordination polymer exhibiting strong binding enthalpy and adsorption capacity for carbon dioxideElectronic supplementary information (ESI) available: X-ray powder diffraction and TGA trace, Ar BET plot, Ar Isotherm and combined CO2 plot for 1a. CCDC 884011 (for 1a), 884012 (for 1b) and 884013 (for 2). For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c2dt31361h

• Main Authors: Eckold, Pierre, Gee, William J, Hill, Matthew R, Batten, Stuart R
• Format: Journal Article
• Language: English
• Published: 16.10.2012
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c2dt31361h

The synthesis and characterisation of microporous coordination polymers containing copper( ii ) or cobalt( ii ) and 2-(pyridin-4-yl)malonaldehyde ( Hpma ) is described and the gas adsorption properties evaluated. Single-crystal X-ray structure determinations identified the structures as 3 [M( pma ) 2 ]2X (M = Cu, 1 ; Co, 2 ; X = MeOH, MeCN), which contain 3D networks with rutile topology and continuous 1D rectangular channels with diameters ranging from 3 to 4 . The materials exhibit low BET surface areas of 143 m 2 g 1 , but possess large capacities for carbon dioxide capture of 14.1 wt%. The small pore channels are shown to account for this, delivering a particularly strong binding enthalpy to adsorbed CO 2 of 38 kJ mol 1 , and a very large adsorption capacity relative to the low surface area. Reaction of Co II or Cu II with 2-(pyridine-4-yl)malonaldehyde generates 3D rutile-like coordination polymers that contain small pores which show strong binding enthalpies towards CO 2 .