Science Faculty

Bienvenido a QOAS

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Hydrogen-bonded Multicomponent Nanoobjects

Widely used by nature in defining the structure of biomolecules, hydrogen bonding is regarded as a powerful means to control supramolecular architecture, since it is a directional, selective and strength-tunable non-covalent interaction.
In our group we want to profit from the attributes of this extraordinary interaction to selectively build different kinds of polyhedral nanoobjects. H-bonding directors - i.e. fragments having an array of H-bonding donor and aceptors groups -, such as nucleoside derivatives, are strategically coupled to rigid blocks so as to guide their assembly into just one specific, well-defined structure. The different functional components in these discrete nanoobjects can cooperate so that the assemble may display a specific property.

 

See for example:

J. Am. Chem. Soc. 2013, 135, 19311
Angew. Chem. Int. Ed. 2015, 54, 6780
Org. Lett. 2015, 17, 2664
Angew. Chem. Int. Ed. 2016, 55, 223
ChemistryOpen 2016, 5, 10

Hierarchically assembled 1D Polymers, 2D Networks, and 3D Frameworks

We pursue the synthesis of systems and materials by supramolecular polymerization, that is, a polymerization process where the monomeric repeat units are held together by noncovalent bonds, such as metal-ligand coordination, π-π dispersive, dipolar, or H-bonding interactions. The careful design of the self-assembling building blocks and the control of the interplay between multiple non-covalent interactions will define the dimensionality of such systems.

1D Nanofibers or nanowires made of stacked functional π-conjugated molecules in which we will try to rule stack length and composition.

2D Networks grown onto metal or graphitic surfaces and 2D layered materials where we will try to control molecular positioning.

3D ordered frameworks that are built by combination of different reversible non-covalent or covalent reactions and that will be endowed with custom-tailored nanochannels. These systems may find application as nanomembranes for advanced separation technologies.

 

See, for example

Chem. Mater. 2011, 23, 310
Angew. Chem. Int. Ed. 2015, 54, 2543
Angew. Chem. Int. Ed. 2016, 55, 659