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Issue 40, 2019
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Calix[4]arene-based polyoxometalate organic–inorganic hybrid and coordination polymer as heterogeneous catalysts for azide–alkyne cycloaddition and Knoevenagel condensation reaction

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Abstract

Based on a neutral pyridyl-functional calix[4]arene ligand (L = tetrakis [(3-pyridylmethyl)oxy]-p-tertbutylcalix[4]arene), one polyoxometalate-based organic–inorganic hybrid [Cu2L(SiW12O40)0.5]·CH3CN·2H2O (1) and one coordination polymer [CdCl2L]·CH3CN (2) have been successfully synthesized under solvothermal conditions. 1 exhibits a distinctive layer attributed to the weak interactions among the positive Cu(I)–L chains and [SiW12O40]4 anions. 2 displays a chain model containing a Cd(II) dimer. Both 1 and 2 were investigated as heterogeneous catalysts. 1 is an excellent heterogeneous catalyst for the azide–alkyne cycloaddition (AAC) reaction and 2 exhibits highly efficient catalytic performance for the Knoevenagel condensation reaction. Both 1 and 2 were easily separated.

Graphical abstract: Calix[4]arene-based polyoxometalate organic–inorganic hybrid and coordination polymer as heterogeneous catalysts for azide–alkyne cycloaddition and Knoevenagel condensation reaction

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Publication details

The article was received on 30 Jul 2019, accepted on 10 Sep 2019 and first published on 25 Sep 2019


Article type: Paper
DOI: 10.1039/C9NJ03930A
New J. Chem., 2019,43, 15871-15878

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    Calix[4]arene-based polyoxometalate organic–inorganic hybrid and coordination polymer as heterogeneous catalysts for azide–alkyne cycloaddition and Knoevenagel condensation reaction

    L. Yue, Y. Liu, G. Xu and J. Ma, New J. Chem., 2019, 43, 15871
    DOI: 10.1039/C9NJ03930A

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