Highly Water‐Soluble Thermally Responsive Poly(thiophene)‐Based Brushes

Balamurugan, Sreelatha S.; Bantchev, Grigor B.; Yang, Yuming; McCarley, Robin L.

doi:10.1002/anie.200500867

Cited by 95 publications

(102 citation statements)

References 36 publications

(7 reference statements)

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“…Some examples of these stimuli include heat, [1][2][3][4][5][6][7][8][9] deformation, [10][11][12][13][14][15][16][17][18][19][20] chemicals, [21][22][23] light, [24][25][26] and others, [27,28] which make the sensors useful for a wide range of technologies. [29,30] We recently reported on a new class of polymers with built-in optical deformation [31][32][33][34][35] and threshold temperature [33,34,36] sensors.…”

Section: Introductionmentioning

confidence: 99%

Threshold Temperature Sensors with Tunable Properties

Crenshaw

Kunzelman

Sing

et al. 2007

Macro Chemistry & Physics

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Thermochromic polymer/dye blends based on small amounts (0.6–2.3 wt.‐%) of chromogenic sensor dyes and glassy amorphous polymers were prepared. Subjecting melt‐processed, quenched blends to temperatures above Tg leads to permanent and pronounced changes of their absorption and fluorescence spectra as a result of phase separation and assembly of dye aggregates. The influence of dye structure and polymer Tg on the aggregation kinetics of these blends was investigated. It is shown that increasing the length of the dye's rigid core leads to slower aggregation rates due to limited mobility in the polymer. The threshold of the color change can be tailored by adjusting the polymer Tg, as was shown by the systematic investigation of blends based on poly(alkyl methacrylate) copolymers of varying composition.magnified image

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Section: Introductionmentioning

confidence: 99%

Threshold Temperature Sensors with Tunable Properties

Crenshaw

Kunzelman

Sing

et al. 2007

Macro Chemistry & Physics

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“…The blue-shift of 15 nm (for DT ¼ 508) observed in the spectrum of the aqueous PEDOT-ImBF 4 Cl solution can be considered significant because aqueous solutions of polythiophene-based materials reveal a similar blue-shift (16 nm for DT ¼ 218). [31] Consequently, the thermochromism of PEDOT-Im can be explained through changes in the conjugation length of the PEDOT backbone caused by steric interactions of the ionic liquid moieties. To confirm that the color change and the assumed thermochromic effect of PEDOT-Im were not due to changes in absorption of the solvent and that PEDOT-Im was not heatsensitive in the NIR, we looked at the absorption spectra of pure water at different temperatures, and no significant changes in the absorbance upon heating were observed (Supporting Information, Fig.…”

Section: Responsiveness To Ph and Chemical Oxidantsmentioning

confidence: 99%

Multiresponsive PEDOT–Ionic Liquid Materials for the Design of Surfaces with Switchable Wettability

Döbbelin

Tena‐Zaera

Marcilla

et al. 2009

Adv Funct Materials

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Among the different types of stimuli‐responsive polymers, conjugated polymers reveal unique multiresponsive behavior. In this work, the synthesis and characterization of new functional poly(3,4‐ethylenedioxythiophenes) (PEDOT) bearing imidazolium ionic‐liquid moieties (PEDOT‐Im) is reported. PEDOT‐Im polymers show multiresponsive properties to a variety of stimuli, such as temperature, pH, oxidative doping, and presence of anions. These stimuli provoke different changes in PEDOT‐Im, such as changes in color, oxidation state, and, wetting behavior. In all cases, a reversible effect is observed, and the polymers reveal responsive properties in solution as well as in the form of thin films. Whereas sensitiveness to pH and oxidative doping are known phenomena for other PEDOT derivatives, responsiveness to temperature and to anions is a unique property of PEDOT‐Im. The anion exchange is further investigated by means of the Quartz Crystal Microbalance with dissipation. Anion exchanges induce fast, adjustable, and reversible contact angle changes between 24° and 107°. As a potential application, surfaces with switchable wettability triggered by anion solutions are prepared by spin‐coating PEDOT‐Im films onto different substrates.

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“…Among those external stimuli, thermoresponsive polymers demonstrate thermally induced, reversible phase transitions. [8][9][10] Such polymers possessing a lower critical solution temperature (LCST) in water are expected to be useful in nanotechnology and biotechnology. These polymers are soluble in water below their LCST by forming hydrogen bonding with water molecules, but become dehydrated and precipitated when heated above the LCST, leading to the fast phase transitions.…”

Section: Introductionmentioning

confidence: 99%

Precise Control of Thermoresponsive Properties of Polymers with Hydroxy Groups in the Side Chains

Lee¹

2015

Polymer Korea

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Thermoresponsive polymers were successfully synthesized by a combination of atom transfer radical polymerization (ATRP) and Cu(I)-catalyzed 1,3-dipolar cycloaddition of azide and alkynes (click chemistry). Poly(2-hydroxyethyl methacrylate) (PHEMA) was synthesized by ATRP, followed by introduction of alkyne groups using pentynoic acid, leading to HEMA-alkyne. Homopolymers having secondary amine groups, tertiary amines with hydroxyethyl and hydroxypropyl groups were synthesized by adding 2-azido-N-ethyl-ethanamine, 2-[(2-azidoethyl)amino]ethanol, and 2-[(2-azidoethyl)amino]propanol, respectively, to the PHEMA-alkyne backbone using click chemistry. Molecular weight (MW), molecular weight distribution (MWD), and click reaction efficiency were determined by gel permeation chromatography (GPC) and 1 H NMR spectroscopy. The transmission spectra of the 1.0 wt% aqueous solutions of the resulting polymers at 650 nm were measured as a function of temperature. Results showed that the lower critical solution temperature (LCST) could be easily controlled by the length of the hydroxyalkyl groups.

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Highly Water‐Soluble Thermally Responsive Poly(thiophene)‐Based Brushes

Cited by 95 publications

References 36 publications

Threshold Temperature Sensors with Tunable Properties

Threshold Temperature Sensors with Tunable Properties

Multiresponsive PEDOT–Ionic Liquid Materials for the Design of Surfaces with Switchable Wettability

Precise Control of Thermoresponsive Properties of Polymers with Hydroxy Groups in the Side Chains

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