A luminescent zinc-based metal-organic framework (MOF; 1) was synthesized from a highly conjugated tridentate ligand, 1,3,5-tris[(1E)-2′-(4′′-benzoic acid)vinyl]benzene. X-ray single crystal analysis reveals the organization of 1 in a three-dimensional porous framework. Thermogravimetric analysis shows that 1 has a good thermal stability, and resists decomposition up to 420 °C. The removal of the solvent molecules from the cavities leads to a temporary loss of crystallinity, which can be regained by heating the MOF in diethylformamide, the solvent used for the synthesis, as shown by powder X-ray diffraction. In addition, 1 shows luminescent features influenced by the chemical environment, making it suitable as optical sensor. Detection of methanol with a turn-on effect was possible in low concentration in mixtures with water (50 μL/3 mL and 10 μL/3 mL) and as vapor.

Methanol Sensing by a Luminescent Zinc(II)-Based Metal−Organic Framework / S. Durini, N. Ilic, K. Ramazanova, T. Grell, P. Lonnecke, E. Hey-Hawkins. - In: CHEMPLUSCHEM. - ISSN 2192-6506. - 84:3(2019 Mar), pp. 307-313. [10.1002/cplu.201900109]

Methanol Sensing by a Luminescent Zinc(II)-Based Metal−Organic Framework

T. Grell;
2019-03

Abstract

A luminescent zinc-based metal-organic framework (MOF; 1) was synthesized from a highly conjugated tridentate ligand, 1,3,5-tris[(1E)-2′-(4′′-benzoic acid)vinyl]benzene. X-ray single crystal analysis reveals the organization of 1 in a three-dimensional porous framework. Thermogravimetric analysis shows that 1 has a good thermal stability, and resists decomposition up to 420 °C. The removal of the solvent molecules from the cavities leads to a temporary loss of crystallinity, which can be regained by heating the MOF in diethylformamide, the solvent used for the synthesis, as shown by powder X-ray diffraction. In addition, 1 shows luminescent features influenced by the chemical environment, making it suitable as optical sensor. Detection of methanol with a turn-on effect was possible in low concentration in mixtures with water (50 μL/3 mL and 10 μL/3 mL) and as vapor.
luminescence; metal-organic frameworks; methanol; sensors; zinc
Settore CHIM/03 - Chimica Generale e Inorganica
4-mar-2019
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/906144
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