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Influence of Chain Architecture on Nanopore Accessibility in Polyelectrolyte Block‐Co‐Oligomer Functionalized Mesopores

Brilmayer, Robert ; Hess, Christian ; Andrieu‐Brunsen, Annette (2021):
Influence of Chain Architecture on Nanopore Accessibility in Polyelectrolyte Block‐Co‐Oligomer Functionalized Mesopores. (Publisher's Version)
In: Small, 41 (15), Wiley, ISSN 1613-6810,
DOI: 10.26083/tuprints-00019924,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Influence of Chain Architecture on Nanopore Accessibility in Polyelectrolyte Block‐Co‐Oligomer Functionalized Mesopores
Language: English
Abstract:

Functionalized ordered mesoporous silica materials are commonly investigated for applications such as drug release, sensing, and separation processes. Although, various homopolymer functionalized responsive mesopores are reported, little focus has been put on copolymers in mesopores. Mesoporous silica films are functionalized with responsive and orthogonally charged block-co-oligomers. Responsive 2-dimethylamino)ethyl methacrylate)-block-2-(methacryloyloxy)ethyl phosphate (DMAEMA-b-MEP) block-co-oligomers are introduced into mesoporous films using controlled photoiniferter initiated polymerization. This approach allows a very flexible charge composition design. The obtained block-co-oligomer functionalized mesopores show a complex gating behavior indicating a strong interplay between the different blocks emphasizing the strong influence of charge distribution inside mesopores on ionic pore accessibility. For example, in contrast to mesopores functionalized with zwitterionic polymers, DMAEMA-b-MEP block-co-oligomer functionalized mesopores, containing two oppositely charged blocks, do not show bipolar ion exclusion, demonstrating the influence of the chain architecture on mesopore accessibility. Furthermore, ligand binding–based selective gating is strongly influenced by this chain architecture as demonstrated by an expansion of pore accessibility states for block-co-oligomer functionalized mesopores as compared to the individual polyelectrolyte functionalization for calcium induced gating.

Journal or Publication Title: Small
Journal volume: 41
Number: 15
Publisher: Wiley
Collation: 7 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Divisions: 07 Department of Chemistry > Fachgebiet Makromolekulare Chemie
07 Department of Chemistry > Physical Chemistry
Date Deposited: 19 Nov 2021 13:08
Last Modified: 19 Nov 2021 13:09
DOI: 10.26083/tuprints-00019924
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-199247
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19924
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