Alkaline earth metal-based metal-organic framework: hydrothermal synthesis, X-ray structure and heterogeneously catalyzed Claisen-Schmidt reaction

作者：Saha Debra; Maity Tanmoy; Koner Subratanath^*

来源：Dalton Transactions, 2014, 43(34): 13006-13017.

DOI：10.1039/c4dt00575a

Two alkaline earth metal-based carboxylate systems, [Mg(HL)(H2O)(2)](n) (1) and [Ca(H2L)(2)](n) (2) (H3L = chelidamic acid) have been hydrothermally synthesized, and characterized by single-crystal X-ray diffraction, IR, elemental analysis, and thermo-gravimetric analysis. Compound 1 has a 2D structure incorporating two water molecules. The dehydrated species, la, generated from 1 by removal of the coordinated water, has been characterized by thermo-gravimetric analysis. IR, elemental analysis and variable temperature powder X-ray diffraction. Both 1 and its dehydrated species la catalyze the Claisen-Schmidt reaction under heterogeneous conditions, but la is a more effective catalyst under environmentally friendly conditions. The catalyst can readily be recovered and reused in successive cycles without detectable loss of activity. Compound 2 has a 3D structure and is thermally stable up to 540 degrees C, but is inactive catalytically.

• 出版日期2014-9-14