ISMSC 2007 - Università degli Studi di Pavia

Synthesis of new Calixarenic Dendron
Mouna Mahouachi a,b, Rym Abidi, b ,* Jacques Vicens a ,* and Yang Kim, c ,*
PSB 91
a
ULP-ECPM, UMR 7178-LC4-IPHC, Laboratoire de Conception Moléculaire, 25, rue Becquerel,
F-67087 Strasbourg, Cédex, France
b
Université de Bizerte, Facultés des Sciences, 7021 Zarzouna-Bizerte, Tunisie
c
Department of Chemistry and Advanced Materials, Kosin University, Yeongdo-gu, Busan, 606-
702 Korea
The term "dendrimer" comes from two words, dendrite and polymer, the first evoking the
ramified structure of the molecules, the second the repetition of the same motive. Those
dendrimers are giant hyperbranched molecules made up of multi-functionnalized central cores,
branches, internal cavities resulting from the ramifications and end groups. While the dendrons
are derivatives of dendritic molecules, which, in addition to the surface functionality, cores are
also functionalized. These nanomaterial have potential applications in different fields (catalyses,
pharmacy, biochemistry, molecular recognition, environment, optics…). Indeed their tree-like
structure, allowing to the dendrimers an internal cavities close to the cores, as well as the
functions located on the surface, makes them suitable as complexing agent for small molecules
or metals. We have been interested in a new family of dendrimers supporting N–multidentate
cores and calixarenes, macrocycles with three-dimensional cavities, as branches Within this
framework six new dendrimers of first generation were synthesized.
Cation Binding Properties by Ligands Deriving from Calix[4]crown-5-
azacrown-5
Mouna Mahouachi a,b , Rym Abidi, b ,* Jong Seung Kim, c ,*and Jacques Vicens a ,*
PSB 92
a
ULP-ECPM, UMR 7178-LC4-IPHC, Laboratoire de Conception Moléculaire, 25, rue Becquerel,
F-67087 Strasbourg, Cédex, France
b
Université de Bizerte, Facultés des Sciences, 7021 Zarzouna-Bizerte, Tunisie
c
Department of Chemistry, Dankook University, Seoul 140-714, Korea
The biphasic extraction and the complexation behavior of monoazacrown-dipropoxy or
monoazacrown- monoethercrown calix[4]arene were assessed by UV spectrophotometry and
1 H NMR titration experiments.
Our principal objective was to observe the amine proton substitution effect on the chelating and
exractant properties, and to compare azacrown cavities behavior in presence of dipropoxy and
ethercrown.
Evidence of ML, ML2 and M2L complex formation with alkali metal ions in acetonitrile was
obtained.