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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
EN
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| URI | http://purl.tuc.gr/dl/dias/F5C036C3-94A6-40F3-BB12-EBA3BA5553BD | - |
| Identifier | https://doi.org/10.1039/b918308f | - |
| Language | en | - |
| Extent | 6 pages | en |
| Title | Boronic acid dendrimer receptor modified nanofibrillar cellulose membranes | en |
| Creator | Elefteria Psillakis | en |
| Creator | chael J. Bonn | en |
| Creator | Matthew Helton | en |
| Creator | Karen J. Edler | en |
| Publisher | Royal Society of Chemistry | en |
| Content Summary | Cellulose nanofibrils from sisal of typically 4–5 nm diameter and ca. 250 100 nm length are reconstituted into thin films of ca. 6 mm 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 M1. 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 mM to 1 mM. | en |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2015-09-24 | - |
| Date of Publication | 2010 | - |
| Bibliographic Citation | M.J Bonné, E. Galbraith, T. D James, M.w J Wasbrough, K. J Edler, A T. A Jenkins, M. Helton, A. McKee, W.Thielemans, E. Psillakis, F. Marken , "Boronic acid dendrimer receptor modified nanofibrillar cellulose membranes ",J. of Mat. Ch.,vol. 20 ,no.3 ,pp.588-594,2010.doi:10.1039/b918308f | en |
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