title: Surface molecular tailoring using pH-switchable supramolecular dendron-ligand assemblies.
abstract: The rational design of materials with tailored properties is of paramount importance for a wide variety of biological, medical, electronic and optical applications. Here we report molecular level control over the spatial distribution of functional groups on surfaces utilizing self-assembled monolayers (SAMs) of pH-switchable surface-appended pseudorotaxanes. The supramolecular systems were constructed from a poly(aryl ether) dendron-containing a dibenzo[24]crown-8 (DB24C8) macrocycle and a thiol ligand-containing a dibenzylammonium recognition site and a fluorine end group. The dendron establishes the space (dendritic effect) that each pseudorotaxane occupies on the SAM. Following SAM formation, the dendron is released from the surface by switching off the noncovalent interactions upon pH stimulation, generating surface materials with tailored physical and chemical properties.
authors.affiliation: School of Chemical Engineering and ⊥School of Chemistry, University of Birmingham , Birmingham B15 2TT, United Kingdom.
authors.forename: Parvez
authors.initials: P
authors.lastname: Iqbal
authors.forename: Frankie J
authors.initials: FJ
authors.lastname: Rawson
authors.forename: Watson K-W
authors.initials: WK
authors.lastname: Ho
authors.forename: Siu-Fung
authors.initials: SF
authors.lastname: Lee
authors.forename: Ken Cham-Fai
authors.initials: KC
authors.lastname: Leung
authors.forename: Xingyong
authors.initials: X
authors.lastname: Wang
authors.forename: Akash
authors.initials: A
authors.lastname: Beri
authors.forename: Jon A
authors.initials: JA
authors.lastname: Preece
authors.forename: Jing
authors.initials: J
authors.lastname: Ma
authors.forename: Paula M
authors.initials: PM
authors.lastname: Mendes
mesh_terms: D000873:Anthracenes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008024:Ligands; D013499:Surface Properties; D017155:Wettability
chemical_list: D000873:Anthracenes; D008024:Ligands; C501244:dendron
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