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Boronic acid dendrimer receptor modified nanofibrillar cellulose membranes

Bonné, Michael J. ; Galbraith, Ewan ; James, Tony D. ; Wasbrough, Matthew J. ; Edler, Karen J. LU orcid ; Jenkins, A. Toby A. ; Helton, Matthew ; McKee, Anthony ; Thielemans, Wim and Psillakis, Elefteria , et al. (2010) In Journal of Materials Chemistry 20(3). p.588-594
Abstract

Cellulose nanofibrils from sisal of typically 4-5 nm diameter and ca. 250 ± 100 nm length are reconstituted into thin films of ca. 6 m thickness (or thicker freestanding films). Pure cellulose and cellulose composite films are obtained in a solvent evaporation process. A boronic acid appended dendrimer is embedded as a receptor in the nanofibrillar cellulose membrane. The number of boronic acid binding sites is controlled by varying the dendrimer content. The electrochemical and spectrophotometric properties of the nanocomposite membrane are investigated using the probe molecule alizarin red S. Pure cellulose membranes inhibit access to the electrode. However, the presence of boronic acid receptor sites allows accumulation of alizarin... (More)

Cellulose nanofibrils from sisal of typically 4-5 nm diameter and ca. 250 ± 100 nm length are reconstituted into thin films of ca. 6 m thickness (or thicker freestanding films). Pure cellulose and cellulose composite films are obtained in a solvent evaporation process. A boronic acid appended dendrimer is embedded as a receptor in the nanofibrillar cellulose membrane. The number of boronic acid binding sites is controlled by varying the dendrimer content. The electrochemical and spectrophotometric properties of the nanocomposite membrane are investigated using the probe molecule alizarin red S. Pure cellulose membranes inhibit access to the electrode. However, the presence of boronic acid receptor sites allows accumulation of alizarin red S with a Langmuirian binding constant of ca. 6000 ± 1000 M-1. The 2-electron 2-proton reduction of immobilized alizarin red S is shown to occur in a ca. 60 nm zone close to the electrode surface. With a boronic acid dendrimer modified nanofibrillar cellulose composition of 96 wt% cellulose and 4 wt% boronic acid dendrimer, the analytical range for alizarin red S in aqueous acetate buffer pH 3 is approximately 10 M to 1 mM.

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publishing date
type
Contribution to journal
publication status
published
in
Journal of Materials Chemistry
volume
20
issue
3
pages
7 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:72949086374
ISSN
0959-9428
DOI
10.1039/b918308f
language
English
LU publication?
no
id
0dce4195-ace6-435e-a155-c5da6e6ce021
date added to LUP
2023-05-04 18:21:14
date last changed
2023-06-09 14:58:26
@article{0dce4195-ace6-435e-a155-c5da6e6ce021,
  abstract     = {{<p>Cellulose nanofibrils from sisal of typically 4-5 nm diameter and ca. 250 ± 100 nm length are reconstituted into thin films of ca. 6 m thickness (or thicker freestanding films). Pure cellulose and cellulose composite films are obtained in a solvent evaporation process. A boronic acid appended dendrimer is embedded as a receptor in the nanofibrillar cellulose membrane. The number of boronic acid binding sites is controlled by varying the dendrimer content. The electrochemical and spectrophotometric properties of the nanocomposite membrane are investigated using the probe molecule alizarin red S. Pure cellulose membranes inhibit access to the electrode. However, the presence of boronic acid receptor sites allows accumulation of alizarin red S with a Langmuirian binding constant of ca. 6000 ± 1000 M<sup>-1</sup>. The 2-electron 2-proton reduction of immobilized alizarin red S is shown to occur in a ca. 60 nm zone close to the electrode surface. With a boronic acid dendrimer modified nanofibrillar cellulose composition of 96 wt% cellulose and 4 wt% boronic acid dendrimer, the analytical range for alizarin red S in aqueous acetate buffer pH 3 is approximately 10 M to 1 mM.</p>}},
  author       = {{Bonné, Michael J. and Galbraith, Ewan and James, Tony D. and Wasbrough, Matthew J. and Edler, Karen J. and Jenkins, A. Toby A. and Helton, Matthew and McKee, Anthony and Thielemans, Wim and Psillakis, Elefteria and Marken, Frank}},
  issn         = {{0959-9428}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{588--594}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Journal of Materials Chemistry}},
  title        = {{Boronic acid dendrimer receptor modified nanofibrillar cellulose membranes}},
  url          = {{http://dx.doi.org/10.1039/b918308f}},
  doi          = {{10.1039/b918308f}},
  volume       = {{20}},
  year         = {{2010}},
}