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Free-Standing Membranes via Covalent Cross-Linking of Polyelectrolyte Multi layers with Complementary Reactivity

Title data

Ott, Patrick ; Trenkenschuh, Katja ; Gensel, Julia ; Fery, Andreas ; Laschewsky, Andre:
Free-Standing Membranes via Covalent Cross-Linking of Polyelectrolyte Multi layers with Complementary Reactivity.
In: Langmuir. Vol. 26 (2010) Issue 23 . - pp. 18182-18188.
ISSN 1520-5827
DOI: https://doi.org/10.1021/la1035882

Official URL: Volltext

Abstract in another language

Polyelectrolyte multilayers were prepared by the layer-by-layer (LbL) technique from polyanions bearing aldehyde and polycations with 4-methylpyridinium moieties. The aldol reaction of these complementary reactive groups can be followed by the formation of fluorescent merocyanine dyes, resulting in cross-linked, ultrathin polymer films. The efficient stabilization of the polymer films allows for their intact removal from high surface energy supports, such as glass or surface oxidized silicon wafers, by simple treatment with salt solutions, yielding free-standing membranes. Increasing separation of the reactive polycation and polyanion layers with layers of inert polycation and polyanion analogues only gradually prevents the coupling reaction. From this dependence, polyions assembled in consecutive adsorption layers seem to be able to penetrate into as far as three neighboring layers.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry II - Univ.-Prof. Dr. Andreas Fery
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 08 Dec 2014 15:38
Last Modified: 18 Mar 2015 13:12
URI: https://eref.uni-bayreuth.de/id/eprint/3993