Constitutional self-organization of adenine-uracil-derived hybrid materials.
The alkoxysilane nucleobase adenine (A) and uracil (U) precursors described in this paper generate in solution a complex library of hydrogen-bonded aggregates, which can be expressed in the solid state as discrete higher oligomers. The different interconverting outputs that nucleobases may form by oligomerization define a dynamic polyfunctional diversity that may be "extracted selectively" in solid state by sol-gel transcription, under the intrinsic stability of the system. After the sol-gel process, unique constitutional preference for specific geometries in hybrid materials is consistent with a preferential arrangement of nucleobase systems, favoring the self-assembly by the Hoogsteen geometry. FTIR and NMR spectroscopy and X-ray powder diffraction experiments demonstrate the formation of self-organized hybrid supramolecular materials. Electron microscopy reveals the micrometric platelike morphology of the hybrid materials. The M(A-U) hybrid material is nanostructured in ordered circular domains of 5 nm in diameter of alternative light and dark rows with an one-dimensional periodicity of 3.5 A.
Arnal-Hérault
Carole
C
Adaptative Supramolecular Nanosystems Group, Institut Européen des Membranes -ENSCM/UM2/CNRS 5635, IEM/UM2, CC 047, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
Barboiu
Mihai
M
Pasc
Andreea
A
Michau
Mathieu
M
Perriat
Pascal
P
van der Lee
Arie
A