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Supramolecular complexes of podand ligands with xenon

100%

Gierczyk B., Pankiewicz R.

Open Chemistry

2014

vol. 12

issue 5

624-634

Formation of stable complexes between xenon and podand polyoxyethylene ligands was ascertained. The complexation process was studied by 129Xe NMR titration, NMR diffusiometry and heteronuclear NOE measurements. The ligands studied form a 1:1 complexes with Xe(0). Their stability constants depend on the ligand structure, i.e., polyoxyethylene chain length, number of complexating polyether units and the topology of the anchoring centre.

Immobilization of quaternary ammonium salts on silica gel for perchlorate ions removal

81%

Kurczewska J., Pankiewicz R., Schroeder G.

Open Chemistry

2012

vol. 10

issue 5

1452-1458

Silica surface was modified with quaternary ammonium salts to give three matrices of different chain length. The synthesized supports were characterized by elemental analysis and infrared spectroscopy, as well as scanning electron microscopy and semi-empirical parametric method 5. Their exchange capacities for ClO4−, F−, NO3− and CH3COO− ions were investigated by conductometric titration. The amount of exchanged chloride ions from the matrix was studied for different initial anions concentration. The functionalized silica gel showed very good ability of perchlorate ions exchange from the water solution in room temperature. The anion-exchange properties were also studied in comparison to different number of reactive sites in the matrices. The increased number of chloride at the silica surface took effect on increased ability of ClO4− anion exchange [...]

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2 Open Chemistry

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2 Pankiewicz R.

1 Gierczyk B.

1 Kurczewska J.

1 Schroeder G.

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Supramolecular complexes of podand ligands with xenon

Immobilization of quaternary ammonium salts on silica gel for perchlorate ions removal