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Sponge‐Like Behaviour in Isoreticular Cu(Gly‐His‐X) Peptide‐Based Porous Materials
Author(s) -
MartíGastaldo Carlos,
Warren John E.,
Briggs Michael E.,
Armstrong Jayne A.,
Thomas K. Mark,
Rosseinsky Matthew J.
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201502098
Subject(s) - tripeptide , sorption , adsorption , peptide , sponge , chemistry , porosity , urea , amine gas treating , porous medium , amino acid , metal organic framework , polymer chemistry , chemical engineering , combinatorial chemistry , organic chemistry , biochemistry , botany , engineering , biology
We report two isoreticular 3D peptide‐based porous frameworks formed by coordination of the tripeptides Gly‐ L ‐His‐Gly and Gly‐ L ‐His‐ L ‐Lys to Cu II which display sponge‐like behaviour. These porous materials undergo structural collapse upon evacuation that can be reversed by exposure to water vapour, which permits recovery of the original open channel structure. This is further confirmed by sorption studies that reveal that both solids exhibit selective sorption of H 2 O while CO 2 adsorption does not result in recovery of the original structures. We also show how the pendant aliphatic amine chains, present in the framework from the introduction of the lysine amino acid in the peptidic backbone, can be post‐synthetically modified to produce urea‐functionalised networks by following methodologies typically used for metal–organic frameworks built from more rigid “classical” linkers.