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Issue 4, 2008
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Organosilicas based on purine–pyrimidinebase pair assemblies: a solid state NMR point of view

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Abstract

Organosilicas based on adenine (A) and thymine (T) assemblies have been synthesized. A surfactant-free route, based on specific molecular recognition between A and T entities, has been developed. The characterization of the H-bond networks, in both homo- and hetero-assemblies, has been emphasized by using 1H solid state NMR (nuclear magnetic resonance). The latest experimental developments were implemented (i.e. very fast MAS (magic angle spinning) experiments at 750 MHz and 33 kHz), in order to enhance drastically the spectral resolution. Moreover, 1H experiments at 67 kHz in 1.3 mm rotors were performed. Spatial connectivities between protons were established by using 1H–1H DQ (double quantum) MAS experiments, allowing the precise characterization of A/A, T/T and A/T associations.

Graphical abstract: Organosilicas based on purine–pyrimidinebase pair assemblies: a solid state NMR point of view

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Article information


Submitted
25 Sep 2007
Accepted
20 Nov 2007
First published
30 Nov 2007

J. Mater. Chem., 2008,18, 392-399
Article type
Paper

Organosilicas based on purinepyrimidinebase pair assemblies: a solid state NMR point of view

G. Arrachart, C. Carcel, J. J. E. Moreau, G. Hartmeyer, B. Alonso, D. Massiot, G. Creff, J. Bantignies, P. Dieudonne, M. W. C. Man, G. Althoff, F. Babonneau and C. Bonhomme, J. Mater. Chem., 2008, 18, 392
DOI: 10.1039/B714785F

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