Solution−Surface Electropolymerization:  A Route to Morphologically Novel Poly(pyrrole) Using an Ionic Liquid

Pringle, Jennifer M.; Forsyth, Maria; Wallace, Gordon G.; MacFarlane, Douglas R.

doi:10.1021/ma061395v

Cited by 36 publications

(47 citation statements)

References 26 publications

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“…[15] By simple visual inspection it was possible to observe significant differences in volume, roughness, shape and colour between the ionogels and the reference polymer gel which did not contain any ionic liquid. [dbsa] -anions have been classed as "inert" hydrophobic solvents [32], and therefore The results suggest that, as in the case of photo-responsive polymer hydrogels, [27,28] the photo-induced ionogel shrinkage proceeds through two different steps; at first, the MC-H + SP + H + photoswitching process takes place under white light irradiation, and this is rapidly followed by water expulsion from the bulk polymer from the resulting much more hydrophobic SP-ionogel. Therefore, these two processes are the responsible of the divergence in actuation behaviour of the different ionogels when irradiated with the same amount of white light.…”

Section: 1mentioning

confidence: 96%

Ionogel-based light-actuated valves for controlling liquid flow in micro-fluidic manifolds

et al. 2010

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We present the fabrication, characterisation and performance of four novel ionic liquid polymer gels (ionogels) as photo-actuated valves incorporated into microfluidic manifolds. The ionogels incorporate benzospiropyran units and phosphonium based ionic liquids. Each ionogel is photo-polymerised in-situ in the channels of a poly(methyl methacrylate) micro-fluidic device, generating a manifold incorporating four different micro-valves. The valves are actuated by simply applying localised white light irradiation, meaning that no physical contact between the actuation impulse (light) and the valve structure is required. Through variation of the composition of the ionogels, each of the micro-valves can be tuned to open at different times under similar illumination conditions. Therefore, flows through the manifold can be independently controlled by a single light source. At present, the contraction process to open the channel is relatively rapid (seconds) while the recovery (expansion) process to re-close the channel is relatively slow (minutes), meaning that the valve, in its current form, is better suited for single-actuation events.

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Section: 1mentioning

confidence: 96%

Ionogel-based light-actuated valves for controlling liquid flow in micro-fluidic manifolds

et al. 2010

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“…Recently a number of papers have focused on the use of ILs as electrolytes (or electrolyte components in mixture with other chemicals) and as media for use within electropolymerization [5][6][7][8][9][10][11]. However, only few works reported in the literature have dealt with the polymerization of polypyrrole [12][13][14][15]. In this study the synthesis of this polymer in the highly hydrophobic room temperature ionic liquid PYR 14 TFSI and its properties are investigated by means of EIS in view of its possible applications in the sensing and biosensing areas.…”

Section: Introductionmentioning

confidence: 99%

An Impedimetric Glucose Biosensor Based on Overoxidized Polypyrrole Thin Film

et al. 2011

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Polypyrrole (pPy) thin films were synthesized electrochemically by a pulse method on platinum electrodes in Nbutyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide ionic liquid (PYR 14 TFSI). An important aspect of this procedure is the use of an ionic liquid, as synthetic medium. Further, it can be used for several procedures and it can then be renewed and recycled by a simple extraction just with warm water. It is therefore possible to remove it from all the residual oxidized pyrrolic compounds and purify the solvent in a very simplicistic way. After the synthesis pPy was overoxidized (opPy ) and the process was followed by EIS (Electrochemical Impedance Spectroscopy). opPy is attractive for the realization of sensors and biosensors because of its good selectivity towards hydrogen peroxide (H 2 O 2 ) with respect to the most common interferents. In particular it can find an application in food process control. The EIS response to hydrogen peroxide and biological interferents indicated opPy as a highly sensitive electrochemical platform for impedimetric sensing. The glucose oxidase enzyme (GOD) was immobilized onto the polymer and the modified electrode was assembled and tested as an impedimetric biosensor. This technique seems very promising for application in food process control.

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“…[1][2][3] For these reasons, along with the fact that ILs can undergo multiple solvation interactions, 4 ILs are attracting the attention of a growing number of scientists and engineers for a range of applications. [5][6][7][8] However, the basic science involved with fully characterizing these ILs is still in its infancy, and this may be holding back the complete and most efficient utilization of these solvents.…”

Section: Introductionmentioning

confidence: 99%

Photochromism of nitrobenzospiropyran in phosphonium based ionic liquids

Byrne

Coleman

Fraser

et al. 2009

Phys. Chem. Chem. Phys.

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The photo-, thermo-and solvatochromic properties of 2,3-dihydro-1 0 ,3 0 ,3 0 -trimethyl-6-nitrospiro[1-benzopyran-2,2 0 -1H-indole] (BSP) and its photo-induced merocyanine isomer (MC)were investigated in phosphonium based ILs by UV-vis absorption spectroscopy. It was found that the kinetics and thermodynamics of the BSP 2 MC equilibrium were sensitive to the nature of the anion. The MC l max shifted from 560 nm to 578 nm when in solutions of [P 1,4,4,4 ][tos] and [P 6,6,6,14

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Solution−Surface Electropolymerization: A Route to Morphologically Novel Poly(pyrrole) Using an Ionic Liquid

Cited by 36 publications

References 26 publications

Ionogel-based light-actuated valves for controlling liquid flow in micro-fluidic manifolds

Ionogel-based light-actuated valves for controlling liquid flow in micro-fluidic manifolds

An Impedimetric Glucose Biosensor Based on Overoxidized Polypyrrole Thin Film

Photochromism of nitrobenzospiropyran in phosphonium based ionic liquids

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