Electrochemically controlled release of α, β, γ, δ-tetrakis(4-N-methylpyridyl)porphine from layer-by-layer thin films

Hiroshi Sato; Yoichi Takano; Katsuhiko Sato; Jun ichi Anzai

doi:10.1016/j.jcis.2008.12.071

Electrochemically controlled release of α, β, γ, δ-tetrakis(4-N-methylpyridyl)porphine from layer-by-layer thin films

Hiroshi Sato, Yoichi Takano, Katsuhiko Sato, Jun ichi Anzai

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

The release of α, β, γ, δ-tetrakis(4-N-methylpyridyl)porphyrin (TMPyP) from layer-by-layer assembled thin films composed of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) was electrochemically controlled. The release rate of TMPyP was enhanced when a positive electrode potential (+1.2 to +1.5 V) was applied to the glassy carbon electrode on which TMPyP-loaded PAH/PAA film was coated, while the effect of lower electrode potentials (0 to +1.0 V) was negligibly small. The effect of applied potential on the release rate was more significant at pH 7.4 than in the solutions of pH 8.0 and 9.0. The electrochemically enhanced release of TMPyP was rationalized based on local pH change in the vicinity of the electrode surface, which was induced by electrolysis of H₂O.

Original language	English
Pages (from-to)	141-144
Number of pages	4
Journal	Journal of Colloid And Interface Science
Volume	333
Issue number	1
DOIs	https://doi.org/10.1016/j.jcis.2008.12.071
Publication status	Published - 2009 May 1

Keywords

Controlled release
Electrode potential
Layer-by-layer film
Loading and release

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/j.jcis.2008.12.071

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title = "Electrochemically controlled release of α, β, γ, δ-tetrakis(4-N-methylpyridyl)porphine from layer-by-layer thin films",

abstract = "The release of α, β, γ, δ-tetrakis(4-N-methylpyridyl)porphyrin (TMPyP) from layer-by-layer assembled thin films composed of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) was electrochemically controlled. The release rate of TMPyP was enhanced when a positive electrode potential (+1.2 to +1.5 V) was applied to the glassy carbon electrode on which TMPyP-loaded PAH/PAA film was coated, while the effect of lower electrode potentials (0 to +1.0 V) was negligibly small. The effect of applied potential on the release rate was more significant at pH 7.4 than in the solutions of pH 8.0 and 9.0. The electrochemically enhanced release of TMPyP was rationalized based on local pH change in the vicinity of the electrode surface, which was induced by electrolysis of H2O.",

keywords = "Controlled release, Electrode potential, Layer-by-layer film, Loading and release",

author = "Hiroshi Sato and Yoichi Takano and Katsuhiko Sato and Anzai, {Jun ichi}",

note = "Funding Information: The present work was supported in part by a Grant-in-Aid (No. 19-6647) from The Japan Society for the Promotion of Sciences (JSPS). ",

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doi = "10.1016/j.jcis.2008.12.071",

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AU - Sato, Hiroshi

AU - Takano, Yoichi

AU - Sato, Katsuhiko

AU - Anzai, Jun ichi

N1 - Funding Information: The present work was supported in part by a Grant-in-Aid (No. 19-6647) from The Japan Society for the Promotion of Sciences (JSPS).

PY - 2009/5/1

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N2 - The release of α, β, γ, δ-tetrakis(4-N-methylpyridyl)porphyrin (TMPyP) from layer-by-layer assembled thin films composed of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) was electrochemically controlled. The release rate of TMPyP was enhanced when a positive electrode potential (+1.2 to +1.5 V) was applied to the glassy carbon electrode on which TMPyP-loaded PAH/PAA film was coated, while the effect of lower electrode potentials (0 to +1.0 V) was negligibly small. The effect of applied potential on the release rate was more significant at pH 7.4 than in the solutions of pH 8.0 and 9.0. The electrochemically enhanced release of TMPyP was rationalized based on local pH change in the vicinity of the electrode surface, which was induced by electrolysis of H2O.

AB - The release of α, β, γ, δ-tetrakis(4-N-methylpyridyl)porphyrin (TMPyP) from layer-by-layer assembled thin films composed of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) was electrochemically controlled. The release rate of TMPyP was enhanced when a positive electrode potential (+1.2 to +1.5 V) was applied to the glassy carbon electrode on which TMPyP-loaded PAH/PAA film was coated, while the effect of lower electrode potentials (0 to +1.0 V) was negligibly small. The effect of applied potential on the release rate was more significant at pH 7.4 than in the solutions of pH 8.0 and 9.0. The electrochemically enhanced release of TMPyP was rationalized based on local pH change in the vicinity of the electrode surface, which was induced by electrolysis of H2O.

KW - Controlled release

KW - Electrode potential

KW - Layer-by-layer film

KW - Loading and release

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Electrochemically controlled release of α, β, γ, δ-tetrakis(4-N-methylpyridyl)porphine from layer-by-layer thin films

Abstract

Keywords

ASJC Scopus subject areas

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