Issue 41, 2012

Synthesis, structure and molecular modelling of anionic carbosilane dendrimers

Abstract

Anionic carbosilane dendrimers of generations 1–3 have been synthesized containing carboxylate GnX(C2H4CO2Na)m and sulfonate GnX(C2H4SO3Na)m peripheral groups and derived from two different cores, 1,3,5-(HO)3C6H3 (X = O3) and Si(C3H5)4 (X = Si). The peripheral anionic groups make these dendrimers water soluble, despite their highly hydrophobic framework. These dendrimers present a net negative charge in water, which was influenced by the pH of the medium. This characteristic was studied by pH titration. Also molecular modeling calculations have been performed to study differences in an aqueous medium between carboxylate and sulfonate dendrimers of different cores. The results obtained were also compared with those obtained from DOSY NMR experiments and zeta-potential measurements.

Graphical abstract: Synthesis, structure and molecular modelling of anionic carbosilane dendrimers

Supplementary files

Article information

Article type
Paper
Submitted
22 May 2012
Accepted
10 Aug 2012
First published
16 Aug 2012

Dalton Trans., 2012,41, 12733-12748

Synthesis, structure and molecular modelling of anionic carbosilane dendrimers

B. Rasines, J. Sánchez-Nieves, M. Maiolo, M. Maly, L. Chonco, J. L. Jiménez, M. Á. Muñoz-Fernández, F. J. de la Mata and R. Gómez, Dalton Trans., 2012, 41, 12733 DOI: 10.1039/C2DT31099F

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