pH-Tuned Modulation of 1D Chain to 3D Metal-Organic Framework: Synthesis, Structure and Their Useful Application in the Heterogeneous Claisen-Schmidt Reaction
authors Sen, R; Saha, D; Koner, S; Mal, D; Brandao, P; Lin, Z
nationality International
journal CHEMPLUSCHEM
author keywords Claisen-Schmidt reaction; heterogeneous catalysis; hydrothermal synthesis; magnesium; structure elucidation
keywords DIRECT ALDOL REACTIONS; HYDROTHERMAL SYNTHESIS; NANOCRYSTALLINE MGO; GAS-ADSORPTION; LEWIS-ACID; TEMPERATURE; DIMENSIONALITY; CONDENSATION; CARBOXYLATES; CATALYSIS
abstract The role of pH in the formation of metal-organic frameworks (MOFs) has been studied on magnesium-based carboxylate framework systems [Mg(Pdc)(H2O)(3)](n) (1) and [Mg(Pdc)(H2O)](n) (2) (Pdc=pyridine-2,3-dicarboxylate). The investigation reveals the formation of two different compounds of one- or three-dimensions starting from the same reaction mixture that differs only in pH. Isolated compounds have been characterized by IR and elemental analysis; both compounds were also successfully characterized by single-crystal X-ray diffraction. This study shows that the gradual increase in pH helps to construct a higher-dimensional network. Catalytic activity of compounds 1 and 2 was tested for the Claisen-Schmidt reaction. Compound 2 was successfully dehydrated to produce a coordinately unsaturated compound 2a, which shows higher catalytic activity than 1 or 2 in heterogeneous medium.
publisher WILEY-V C H VERLAG GMBH
issn 2192-6506
year published 2015
volume 80
issue 3
beginning page 591
ending page 598
digital object identifier (doi) 10.1002/cplu.201402340
web of science category Chemistry, Multidisciplinary
subject category Chemistry
unique article identifier WOS:000350471700020
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journal impact factor 2.753
5 year journal impact factor 2.723
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