A Partially Fluorinated Three‐fold Interpenetrated Stable Metal‐Organic Framework with Selective CO2 Uptake12. Issue 6 (12th February 2014)

• Record Type: Journal Article
• Authors: Santra, Atanu; Lah, Myoung Soo; Bharadwaj, Parimal K.
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 640:Issue 6(2014)
• Page Start: 1134
• Page End: 1140
• Publication Date: 2014-02-12
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201300639
• Languages: English
• ISSNs: 0044-2313

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The hydrothermal reaction of Zn(NO₃)₂<bold>·</bold>H₂O and a linear 2, 2′‐bis‐trifluoromethyl‐biphenyl‐4, 4′‐dicarboxylic acid (<bold>H₂L</bold>) ligand with –CF₃ groups at each phenyl moiety of the biphenyl rings leads to the formation of a three‐fold interpenetrated metal‐organic framework (MOF), {[Zn_2.66O_0.66(<bold>L</bold>)₂]<bold>·</bold>2H₂O}<italic>_n</italic> (<bold>1</bold>) at 180 °C. Single‐crystal X‐ray diffraction studies revealed that <bold>1</bold> is constructed from polynuclear clusters [Zn₄O(COO)₆] as secondary building units (SBU). These SBU are connected through the <bold>L</bold>^2– to generate an overall three‐dimensional structure with a 6‐connected primitive cuboidal (α‐Po) network. Thermogravimetric analyses and variable temperature powder X‐ray diffraction measurements suggested that <bold>1</bold> is thermally stable. The porosity of <bold>1</bold> was estimated by N₂, CO₂, H₂, and CH₄ at different temperatures. The framework showed high selectivity of CO₂ uptake over N₂ and CH₄. Furthermore, solid‐state photoluminescence studies were carried out for complex <bold>1</bold> upon excitation at 275 nm at room temperature.</p> </abstract>