Stimuli-responsive degrafting of polymer brushes via addressable catecholato-metal attachments

Asger Holm Agergaard; Steen Uttrup Pedersen; Henrik Birkedal; Kim Daasbjerg

doi:10.1039/D0PY00916D

Stimuli-responsive degrafting of polymer brushes via addressable catecholato-metal attachments

Asger Holm Agergaard, Steen Uttrup Pedersen, Henrik Birkedal^*, Kim Daasbjerg^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Communication

9 Citations (Scopus)

Abstract

Catecholato-metal complexes are widely used in functional materials such as hydrogels, where the dynamic nature of the coordination bonds between catechol and metal ions contributes to self-healing and stimuli-responsive properties. Herein, we translate the pH-controlled speciation of such complexes known from bulk to a surface counterpart. We create catecholato-metal attachments by electrografting catechol to glassy carbon surfaces, enabling binding of Al3+ or Fe3+ and, subsequently, dopamine. When binding dopamine, pH determines whether bis- or tris-catecholato-metal species dominate. Polymer brushes of poly(methyl methacrylate) are grown from these attachments and subsequently detached by electro-oxidation of the catechol, causing the catecholato-metal complex to disintegrate. This study shows that the catecholato-metal complex retains its pH- and oxidation-responsive properties when confined to the surface, and that catechol-based polymer brush interfaces constitute a versatile approach toward on-demand renewal of smart surfaces.

Original language	English
Journal	Polymer Chemistry
Volume	11
Issue	35
Pages (from-to)	5572-5577
Number of pages	6
ISSN	1759-9954
DOIs	https://doi.org/10.1039/D0PY00916D
Publication status	Published - 21 Sept 2020

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title = "Stimuli-responsive degrafting of polymer brushes via addressable catecholato-metal attachments",

abstract = "Catecholato-metal complexes are widely used in functional materials such as hydrogels, where the dynamic nature of the coordination bonds between catechol and metal ions contributes to self-healing and stimuli-responsive properties. Herein, we translate the pH-controlled speciation of such complexes known from bulk to a surface counterpart. We create catecholato-metal attachments by electrografting catechol to glassy carbon surfaces, enabling binding of Al3+ or Fe3+ and, subsequently, dopamine. When binding dopamine, pH determines whether bis- or tris-catecholato-metal species dominate. Polymer brushes of poly(methyl methacrylate) are grown from these attachments and subsequently detached by electro-oxidation of the catechol, causing the catecholato-metal complex to disintegrate. This study shows that the catecholato-metal complex retains its pH- and oxidation-responsive properties when confined to the surface, and that catechol-based polymer brush interfaces constitute a versatile approach toward on-demand renewal of smart surfaces.",

author = "Agergaard, {Asger Holm} and Pedersen, {Steen Uttrup} and Henrik Birkedal and Kim Daasbjerg",

year = "2020",

month = sep,

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doi = "10.1039/D0PY00916D",

language = "English",

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pages = "5572--5577",

journal = "Polymer Chemistry",

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Stimuli-responsive degrafting of polymer brushes via addressable catecholato-metal attachments. / Agergaard, Asger Holm; Pedersen, Steen Uttrup ; Birkedal, Henrik et al.
In: Polymer Chemistry, Vol. 11, No. 35, 21.09.2020, p. 5572-5577.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Communication

TY - JOUR

T1 - Stimuli-responsive degrafting of polymer brushes via addressable catecholato-metal attachments

AU - Agergaard, Asger Holm

AU - Pedersen, Steen Uttrup

AU - Birkedal, Henrik

AU - Daasbjerg, Kim

PY - 2020/9/21

Y1 - 2020/9/21

N2 - Catecholato-metal complexes are widely used in functional materials such as hydrogels, where the dynamic nature of the coordination bonds between catechol and metal ions contributes to self-healing and stimuli-responsive properties. Herein, we translate the pH-controlled speciation of such complexes known from bulk to a surface counterpart. We create catecholato-metal attachments by electrografting catechol to glassy carbon surfaces, enabling binding of Al3+ or Fe3+ and, subsequently, dopamine. When binding dopamine, pH determines whether bis- or tris-catecholato-metal species dominate. Polymer brushes of poly(methyl methacrylate) are grown from these attachments and subsequently detached by electro-oxidation of the catechol, causing the catecholato-metal complex to disintegrate. This study shows that the catecholato-metal complex retains its pH- and oxidation-responsive properties when confined to the surface, and that catechol-based polymer brush interfaces constitute a versatile approach toward on-demand renewal of smart surfaces.

AB - Catecholato-metal complexes are widely used in functional materials such as hydrogels, where the dynamic nature of the coordination bonds between catechol and metal ions contributes to self-healing and stimuli-responsive properties. Herein, we translate the pH-controlled speciation of such complexes known from bulk to a surface counterpart. We create catecholato-metal attachments by electrografting catechol to glassy carbon surfaces, enabling binding of Al3+ or Fe3+ and, subsequently, dopamine. When binding dopamine, pH determines whether bis- or tris-catecholato-metal species dominate. Polymer brushes of poly(methyl methacrylate) are grown from these attachments and subsequently detached by electro-oxidation of the catechol, causing the catecholato-metal complex to disintegrate. This study shows that the catecholato-metal complex retains its pH- and oxidation-responsive properties when confined to the surface, and that catechol-based polymer brush interfaces constitute a versatile approach toward on-demand renewal of smart surfaces.

UR - http://www.scopus.com/inward/record.url?scp=85092371434&partnerID=8YFLogxK

U2 - 10.1039/D0PY00916D

DO - 10.1039/D0PY00916D

M3 - Journal article

SN - 1759-9954

VL - 11

SP - 5572

EP - 5577

JO - Polymer Chemistry

JF - Polymer Chemistry

IS - 35

ER -

Stimuli-responsive degrafting of polymer brushes via addressable catecholato-metal attachments

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