Adsorption and Release of Rose Bengal on Layer-by-Layer Films of Poly(Vinyl Alcohol) and Poly(Amidoamine) Dendrimers Bearing 4-Carboxyphenylboronic Acid

Phenylboronic acid-bearing polyamidoamine dendrimer (PBA-PAMAM)/poly(vinyl alcohol) (PVA) multilayer films were prepared through the layer-by-layer (LbL) deposition of PBA-PAMAM solution and PVA solution. PBA-PAMAM/PVA films were constructed successfully through the formation of boronate ester bonds...

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Bibliographic Details
Published in:Polymers 2020-08, Vol.12 (8), p.1854
Main Authors: Yoshida, Kentaro, Yamaguchi, Akane, Midorikawa, Hiroki, Kamijo, Toshio, Ono, Tetsuya, Dairaku, Takenori, Sato, Takaya, Fujimura, Tsutomu, Kashiwagi, Yoshitomo, Sato, Katsuhiko
Format: Article
Language:English
Subjects:
Acidic oxides
Acids
Adsorption
Boron
Decomposition
Dendrimers
Glucose
Hydrogen peroxide
Multilayers
Polymers
Polyvinyl alcohol
Spectrum analysis
Submerging
Thin films
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Summary:Phenylboronic acid-bearing polyamidoamine dendrimer (PBA-PAMAM)/poly(vinyl alcohol) (PVA) multilayer films were prepared through the layer-by-layer (LbL) deposition of PBA-PAMAM solution and PVA solution. PBA-PAMAM/PVA films were constructed successfully through the formation of boronate ester bonds between the boronic acid moiety in PBA and 1,3-diol units in PVA. When the (PBA-PAMAM/PVA)5 films were immersed in rose bengal (RB) solution, RB was adsorbed onto the LbL films. The amount of RB adsorbed was higher in the LbL films immersed in acidic solution than in basic solution. The release of RB from the LbL films was also promoted in the basic solution, while it was suppressed in the acidic solution. The boronic acid ester is oxidized to phenol by hydrogen peroxide (H2O2) and the carbon-boron bond is cleaved, so that the (PBA-PAMAM/PVA)5 films can be decomposed by immersion in H2O2 solution. Therefore, when RB-adsorbed (PBA-PAMAM/PVA)5 films were immersed in H2O2 solution, the release of RB was moderately promoted when the solution was weakly acidic.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym12081854