1D and 2D Thiazole‐Based Copper(II) Coordination Polymers: Synthesis and Applications in Carbon Dioxide Capture. Issue 3 (21st January 2014)

• Record Type: Journal Article
• Authors: Rossin, Andrea; Tuci, Giulia; Giambastiani, Giuliano; Peruzzini, Maurizio
• Is Part Of: ChemPlusChem. Volume 79:Issue 3(2014:Mar.)
• Page Start: 406
• Page End: 412
• Publication Date: 2014-01-21
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cplu.201300360
• Languages: English
• ISSNs: 2192-6506

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The reaction of different copper(II) salts with a class of thiazole‐based ligands under solvothermal conditions produces three crystalline 1D/2D coordination polymers: [Cu(κ‐<italic>N</italic>‐thiazole)<sub>4</sub>(SiF<sub>6</sub>)]<sub>∞</sub> (<bold>1</bold> (1D)), {Cu[μ‐(κ‐<italic>N</italic>:κ<italic>‐COO</italic>)‐<bold>L<sup>1</sup></bold>]<sub>2</sub>⋅(H<sub>2</sub>O)}<sub>∞</sub> (<bold>2</bold> (2D); H<bold>L<sup>1</sup></bold>=2‐aminothiazole‐5‐carboxylic acid), and {Cu[μ‐(κ‐<italic>N</italic>:κ<italic>‐COO</italic>)‐<bold>L<sup>2</sup></bold>]<sub>2</sub>⋅1.5 (H<sub>2</sub>O)}<sub>∞</sub> (<bold>3</bold> (2D); H<bold>L<sup>2</sup></bold>=thiazole‐5‐carboxylic acid). All the materials have been characterized through common solid‐state techniques: single‐crystal (XRD) and (variable‐temperature) powder X‐ray diffraction (PXRD), infrared spectroscopy (IR), thermogravimetric analysis combined with mass spectrometry (TGA‐MS), and BET surface area and pore‐size distribution measurements. Polymer <bold>3</bold> shows a porous structure made of squared channels formed by the ordered stacking of the planar sheets along the <italic>a</italic> crystallographic axis (inner surface area equal to 15 m<sup>2</sup> g<sup>−1</sup>, as inferred from N<sub>2</sub> adsorption at <italic>T</italic>=77 K on the pre‐activated form), and it has been exploited for CO<sub>2</sub> physisorption at ambient temperature (<italic>T</italic>=303 K) and pressure (<italic>p</italic><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgg4ssg1mfv" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:21926506:media:CPLU201300360:tex2gif-inf-12" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mtext> </mml:mtext><mml:mrow><mml:mtext>CO</mml:mtext><mml:msub><mml:mtext> </mml:mtext><mml:mrow><mml:mtext>2</mml:mtext></mml:mrow></mml:msub></mml:mrow></mml:msub></mml:math></alternatives> max.=920 torr). A remarkable CO<sub>2</sub> uptake equal to 9.0 wt % was recorded under these mild conditions, thereby making the material promising for carbon dioxide capture in post‐combustion flue gas, in which the key factor for a successful performance is the high chemical selectivity for CO<sub>2</sub> over N<sub>2</sub>.</p> </abstract>