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Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo

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Sponge-Like Behaviour in Isoreticular Cu(Gly-His-X) Peptide-Based Porous Materials.

Carlos Martí-Gastaldo^1,2, John E Warren^3,4, Michael E Briggs³

¹Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD (UK). carlos.marti@uv.es.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|September 26, 2015

Summary

Two novel peptide-based porous frameworks exhibit reversible sponge-like behavior. These materials collapse when dried but recover their structure upon exposure to water vapor, showing selective water sorption.

Keywords:

metal-organic frameworks nanoporous materials peptides postsynthetic modifications water adsorption

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Area of Science:

Materials Chemistry
Supramolecular Chemistry
Coordination Chemistry

Background:

Peptide-based porous frameworks are emerging materials with potential applications.
Understanding their structural dynamics and guest interactions is crucial for development.

Purpose of the Study:

To synthesize and characterize novel 3D peptide-based porous frameworks.
To investigate their structural response to guest molecules and explore post-synthetic modification.

Main Methods:

Coordination of tripeptides (Gly-L-His-Gly and Gly-L-His-L-Lys) with Cu(II) ions.
Characterization using sorption studies and structural analysis.
Post-synthetic modification of pendant amine groups.

Main Results:

Two isoreticular 3D peptide-based porous frameworks were successfully synthesized.
Frameworks exhibit reversible structural collapse and recovery upon exposure to water vapor.
Selective sorption of water was observed, while CO2 adsorption did not fully recover the original structure.
Pendant amine groups were successfully modified to create urea-functionalized networks.

Conclusions:

Peptide-based porous frameworks can exhibit dynamic structural behavior analogous to sponge-like materials.
Water vapor plays a critical role in the reversible structural recovery.
These frameworks offer a platform for post-synthetic modification, expanding their potential applications in areas like gas storage and separation.