Tetrabenzylcyclen as a receptor for fluoride

A tetraazacyclic ligand, tetrabenzylcyclen (L), was synthesized using an improved method with a higher yield by treatment of cyclen with benzylchloride in the presence of potassium carbonate. The reaction of L with an aqueous solution of fluorosilicic acid yielded a mixed-anionic salt with the compo...

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Bibliographic Details
Published in:CrystEngComm 2011-01, Vol.13 (11), p.3682-3685
Main Authors: Gelmboldt, Vladimir O., Ganin, Eduard V., Basok, Stepan S., Kulygina, Ekaterina Yu, Botoshansky, Mark M., Kravtsov, Victor Ch, Fonari, Marina S.
Format: Article
Language:English
Subjects:
Anions
Aqueous solutions
Fluorides
Ligands
Receptors
Single crystals
Solid state
X-rays
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Summary:A tetraazacyclic ligand, tetrabenzylcyclen (L), was synthesized using an improved method with a higher yield by treatment of cyclen with benzylchloride in the presence of potassium carbonate. The reaction of L with an aqueous solution of fluorosilicic acid yielded a mixed-anionic salt with the composition [H3L][F][SiF6][middle dot]4H2O (1). The single crystal X-ray study revealed that the macrocyclic tri-cation essentially changes the conformation compared to the free ligand in order to tightly accommodate the fluoride inside and to keep the hexafluorosilicate anions and water molecules outside in the solid state complex.
ISSN:1466-8033
1466-8033
DOI:10.1039/c1ce05279a