Abstract
AbstractA new 3D alkaline earth metal–organic framework (MOF), [Ba(Hdcp)H2O]n (1) (H3dcp = 3,5‐pyrazoledicarboxylic acid), has been hydrothermally synthesized and structurally characterized by single‐crystal X‐ray diffraction analysis. A crystallographic study reveals that each metal ion in 1 is coordinated by eight O atoms and one N atom. Each 3,5‐pyrazoledicarboxylato (Hdcp2–) ligand coordinates to six alkaline earth metal centers through two carboxylate groups, each of which adopts a μ3‐η2:η1‐bridging coordination mode to afford a 3D network. Thermogravimetric analysis reveals that 1 is thermally stable up to ca. 230 °C. An emission band at ca. 466 nm (λmax) was observed in the photoluminescence spectrum of 1 in the solid state at room temperature. Compound 1 heterogeneously catalyzes the aldol condensation reactions of various aromatic aldehydes with acetone, cyclohexanone, acetophenone, and cyclopentanone.
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