A water-soluble pH-responsive molecular brush of Poly(N,N- dimethylaminoethyl methacrylate) grafted polythiophene

Mingfeng Wang; Shan Zou; Gerald Guerin; Lei Shen; Kangqing Deng; Marcus Jones; Gilbert C. Walker; Gregory D. Scholes; Mitchell A. Winnik

doi:10.1021/ma800777m

A water-soluble pH-responsive molecular brush of Poly(N,N- dimethylaminoethyl methacrylate) grafted polythiophene

Mingfeng Wang, Shan Zou, Gerald Guerin, Lei Shen, Kangqing Deng, Marcus Jones, Gilbert C. Walker, Gregory D. Scholes, Mitchell A. Winnik

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

139 Scopus citations

Abstract

We report the synthesis of a new polythiophene (PT)-based molecular brush (PT-g-PDMA) by growing poly(N,N-dimethylaminoethyl methacrylate) (PDMA) chains from the PT backbone by ATRP. The polymer shows a reversible pH response in aqueous solution. A combination of AFM, light scattering, and ¹H NMR measurements indicated that the polymer brush forms a more extended conformation with a decrease in pH from 8 to 2 due to the protonation of the Me ₂N- groups and increased repulsive interactions among the PDMA side chains, which drives the red shift of the absorption and PL spectra of the PT backbone. The good solubility of this polythiophene-based brush in a wide range of solvents is attractive for the fabrication of functional polymer composites.

Original language	English (US)
Pages (from-to)	6993-7002
Number of pages	10
Journal	Macromolecules
Volume	41
Issue number	19
DOIs	https://doi.org/10.1021/ma800777m
State	Published - Oct 14 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "A water-soluble pH-responsive molecular brush of Poly(N,N- dimethylaminoethyl methacrylate) grafted polythiophene",

abstract = "We report the synthesis of a new polythiophene (PT)-based molecular brush (PT-g-PDMA) by growing poly(N,N-dimethylaminoethyl methacrylate) (PDMA) chains from the PT backbone by ATRP. The polymer shows a reversible pH response in aqueous solution. A combination of AFM, light scattering, and 1H NMR measurements indicated that the polymer brush forms a more extended conformation with a decrease in pH from 8 to 2 due to the protonation of the Me 2N- groups and increased repulsive interactions among the PDMA side chains, which drives the red shift of the absorption and PL spectra of the PT backbone. The good solubility of this polythiophene-based brush in a wide range of solvents is attractive for the fabrication of functional polymer composites.",

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language = "English (US)",

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T1 - A water-soluble pH-responsive molecular brush of Poly(N,N- dimethylaminoethyl methacrylate) grafted polythiophene

AU - Wang, Mingfeng

AU - Zou, Shan

AU - Guerin, Gerald

AU - Shen, Lei

AU - Deng, Kangqing

AU - Jones, Marcus

AU - Walker, Gilbert C.

AU - Scholes, Gregory D.

AU - Winnik, Mitchell A.

PY - 2008/10/14

Y1 - 2008/10/14

N2 - We report the synthesis of a new polythiophene (PT)-based molecular brush (PT-g-PDMA) by growing poly(N,N-dimethylaminoethyl methacrylate) (PDMA) chains from the PT backbone by ATRP. The polymer shows a reversible pH response in aqueous solution. A combination of AFM, light scattering, and 1H NMR measurements indicated that the polymer brush forms a more extended conformation with a decrease in pH from 8 to 2 due to the protonation of the Me 2N- groups and increased repulsive interactions among the PDMA side chains, which drives the red shift of the absorption and PL spectra of the PT backbone. The good solubility of this polythiophene-based brush in a wide range of solvents is attractive for the fabrication of functional polymer composites.

AB - We report the synthesis of a new polythiophene (PT)-based molecular brush (PT-g-PDMA) by growing poly(N,N-dimethylaminoethyl methacrylate) (PDMA) chains from the PT backbone by ATRP. The polymer shows a reversible pH response in aqueous solution. A combination of AFM, light scattering, and 1H NMR measurements indicated that the polymer brush forms a more extended conformation with a decrease in pH from 8 to 2 due to the protonation of the Me 2N- groups and increased repulsive interactions among the PDMA side chains, which drives the red shift of the absorption and PL spectra of the PT backbone. The good solubility of this polythiophene-based brush in a wide range of solvents is attractive for the fabrication of functional polymer composites.

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JF - Macromolecules

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A water-soluble pH-responsive molecular brush of Poly(N,N- dimethylaminoethyl methacrylate) grafted polythiophene

Abstract

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