title: Sponge-Like Behaviour in Isoreticular Cu(Gly-His-X) Peptide-Based Porous Materials.
abstract: 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 H2 O while CO2 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.
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD (UK). carlos.marti@uv.es.|Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, 46980 (Spain). carlos.marti@uv.es.
authors.forename: Carlos
authors.initials: C
authors.lastname: Martí-Gastaldo
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD (UK).|School of Materials, The University of Manchester, Sackville Street, Manchester, M1 3BB (UK).
authors.forename: John E
authors.initials: JE
authors.lastname: Warren
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD (UK).
authors.forename: Michael E
authors.initials: ME
authors.lastname: Briggs
authors.affiliation: Wolfson Northern Carbon Reduction Laboratories, School of Chemical, Engineering and Advanced Materials, Newcastle University, Newcastle upon Tyne, NE1 7RU (UK).
authors.forename: Jayne A
authors.initials: JA
authors.lastname: Armstrong
authors.affiliation: Wolfson Northern Carbon Reduction Laboratories, School of Chemical, Engineering and Advanced Materials, Newcastle University, Newcastle upon Tyne, NE1 7RU (UK).
authors.forename: K Mark
authors.initials: KM
authors.lastname: Thomas
authors.affiliation: Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD (UK). m.j.rosseinsky@liverpool.ac.uk.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Rosseinsky
mesh_terms: D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D008667:Metalloproteins / Q000737:chemistry* / Q000378:metabolism; D015394:Molecular Structure; D009842:Oligopeptides / Q000737:chemistry* / Q000378:metabolism; D010455:Peptides / Q000737:chemistry* / Q000378:metabolism; D016062:Porosity; D014508:Urea / Q000737:chemistry
chemical_list: D008667:Metalloproteins; D009842:Oligopeptides; D010455:Peptides; C020905:glycyl-histidyl-lysine; D003300:Copper; D014508:Urea
keywords: metal-organic frameworks; nanoporous materials; peptides; postsynthetic modifications; water adsorption