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Issue 26, 2017
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Lanthanide metal organic frameworks based on dicarboxyl-functionalized arylhydrazone of barbituric acid: syntheses, structures, luminescence and catalytic cyanosilylation of aldehydes

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Abstract

Five isostructural lanthanide MOFs, [Ln(1κOO′,2κO′′,3κO′′′,4κO′′′′-μ4-L)(NO3)(DMF)2]n·n(DMF) {Ln = La3+ (1), Ce3+ (2), Nd3+ (3), Sm3+ (4) and Dy3+ (5); L = 5-[2-{2,4,6-trioxotetrahydropyrimidin-5(2H)-ylidene}hydrazinyl]isophthalate; DMF = N,N′-dimethyl formamide}, based on dicarboxyl-functionalized arylhydrazone of barbituric acid were synthesized under solvothermal conditions. They were characterized by elemental analysis, FT-IR spectroscopy, thermogravimetric and X-ray diffraction analyses. Crystal structure analysis revealed that these frameworks possess a similar type of two dimensional (2D) structure with a dinuclear {Ln2(COO)2} unit acting as a secondary building block. Topological analysis shows that these frameworks display a 3,6-connected kgd; Shubnikov plane (3.6.3.6)/dual net. They exhibit excellent heterogeneous catalytic activities (compound 2 is the most active one) towards the cyanosilylation of aldehydes under solvent-free conditions. These catalysts can be recycled at least up to five cycles without a loss of activity. Compounds 1–5 exhibit luminescence properties in the solid state at room temperature.

Graphical abstract: Lanthanide metal organic frameworks based on dicarboxyl-functionalized arylhydrazone of barbituric acid: syntheses, structures, luminescence and catalytic cyanosilylation of aldehydes

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Article information


Submitted
23 Mar 2017
Accepted
06 Jun 2017
First published
07 Jun 2017

Dalton Trans., 2017,46, 8649-8657
Article type
Paper

Lanthanide metal organic frameworks based on dicarboxyl-functionalized arylhydrazone of barbituric acid: syntheses, structures, luminescence and catalytic cyanosilylation of aldehydes

A. Karmakar, G. M. D. M. Rúbio, A. Paul, M. F. C. Guedes da Silva, K. T. Mahmudov, F. I. Guseinov, S. A. C. Carabineiro and A. J. L. Pombeiro, Dalton Trans., 2017, 46, 8649
DOI: 10.1039/C7DT01056G

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