Toluene-Filled Polypyrrole Microvessels: Entrapment and Dynamics of Encapsulated Perylene

Kubacka, Daria; Krysiński, Paweł; Blanchard, G. J.; Stolarski, Jarosław; Mazur, Maciej

doi:10.1021/jp107316u

Cited by 13 publications

(10 citation statements)

References 56 publications

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“…The polymerization of pyrrole on irradiated and etched PVDF and NH films was subjected to FTIR analysis. The band at 1570 cm 21 is attributed to PPy ring vibration 37 and the band at 1450 cm 21 corresponds to C-N stretching, 38 further substantiating the grafting of PPy as there was no peak observed in the above range for unirradiated PVDF and NH patterns (Fig. 5 a, b).…”

Section: Evidence Of Grafting and Ionomersupporting

confidence: 55%

Nanochannel conduction in piezoelectric polymeric membrane using swift heavy ions and nanoclay

et al. 2013

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A poly(vinylidene fluoride) nanohybrid membrane has been prepared using high energy swift heavy ions (SHI) followed by chemical functionalization. Through-channels were generated by selective etching of the amorphous latent track created during irradiation of SHI, whose average dimensions are varied from 52 nm in pure PVDF to 40 nm for the nanohybrid in the presence of nanoclay, indicating suitable membrane formation using the nanohybrid, as compared to pure PVDF. The nanochannels were suitably grafted with conducting polymer (pyrrole) using the active free radicals caused by SHI irradiation. Spectroscopic and gel permeation chromatographic experiments have been performed to understand the effect of irradiation on filled polymer and subsequent functionalization. Doping and sulphonation on the grafted species has been done to introduce a variety of functionalities. The effect of fluence on the channel width and functionalization study indicates a larger diameter of the channels and formation of a greater ionomer at higher fluence, leading to enhancement of the bulk electrical conductivity up to 10 23 S cm 21 (12 orders higher in magnitude than pure PVDF). The activation energy of the modified nanohybrid membrane is calculated to be 26.9 kJ mol 21 , compared to 10.6 kJ mol 21 of pure PVDF, indicating superior stability of the nanohybrid membrane at higher temperature as compared to pure PVDF or functionalized PVDF under similar conditions. The nanohybrid conducting membrane produces a current of 46 nA compared to a value of almost zero for pristine PVDF or NH measured through I-V characteristic curves against a bias voltage of 10 V, making the nanohybrid suitable for electrochemical applications.

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Section: Evidence Of Grafting and Ionomersupporting

confidence: 55%

Nanochannel conduction in piezoelectric polymeric membrane using swift heavy ions and nanoclay

et al. 2013

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“…8.5 μm). The larger microvessels are likely formed because the buoyant force drives the larger droplets preferentially toward the supporting surface, resulting in larger diameter solid-supported microvessels …”

Section: Resultsmentioning

confidence: 99%

“…Subsequent removal of the templating entity produces hollow polymeric structures. Colloidal particles such as solid particles, − liquid droplets − or gaseous bubbles − are typically used for this purpose, and removal of the template after polymerization depends on the template used. Typically, etching or dissolution can be used for solid templates.…”

Section: Introductionmentioning

confidence: 99%

Pyrene-Loaded Polypyrrole Microvessels

et al. 2011

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The encapsulation of guest molecules within polymeric hollow nano- or microscale structures is a rapidly developing field of interdisciplinary research due to a variety of applications ranging from drug delivery and sensor fabrication to nanoscale synthesis and bioinspired mineralization. We report on the encapsulation of pyrene within three-dimensional polypyrrole microvessels synthesized by precipitation polymerization of pyrrole onto toluene droplets that contain pyrene. Steady state and time-resolved fluorescence measurements show that the optical response and dynamics of encapsulated pyrene is significantly different from that in the free solution, likely due to interactions with oligomeric species generated during the polymerization process that partition into the organic core of the microvessel. Our results indicate that the encapsulation process can have a significant influence on the local environment of encapsulated species, an issue that is critical from the perspective of potential synthetic or medical applications.

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“…In situ oxidative polymerization of pyrrole (Py) is an effective deposition method for coating of solid nanoparticles [ 15–19 ] or liquid organic droplets produce core–shell structures. [ 20–26 ] The presence of structure‐guiding additives which form soft‐templates, [ 27,28 ] reactive templates, [ 29 ] or self‐degraded templates, [ 30 ] allowed to control polymer morphology at nanoscale and synthesized hollow nanoobjects. [ 31 ] The ability of surfactants to self‐assemble into organized templates in the bulk offers potential to fabricate materials that retain this molecular imprint.…”

Section: Introductionmentioning

confidence: 99%

Thermostable Fluorescent Capsules with the Cross‐Linked Heterocyclic Polymer Shell from Poly(pyrrole‐phenosafranin)

Miksa

Steinke

Trzeciak

et al. 2021

Macro Chemistry & Physics

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The present investigation describes the synthesis of capsules with a poly(pyrrole‐phenosafranin) cross‐linked shell. The capsules are prepared in a water solution by the facile single‐step chemical oxidative polymerization of monomers within hydrophobic interior of lipid bilayers that act as temporary scaffolds created by liposomes from 1,2‐dilauroyl‐sn‐glycero‐3‐phosphatidylcholine. The polypyrrole links phenosafranin units via amino groups, thus new thermostable nanocapsules are obtained without additional cross‐linking agents. Their spherical shape is confirmed by electron microscopy. Wide spectral characteristics of capsules by using different analytical methods provide detailed information about their structures.

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Toluene-Filled Polypyrrole Microvessels: Entrapment and Dynamics of Encapsulated Perylene

Cited by 13 publications

References 56 publications

Nanochannel conduction in piezoelectric polymeric membrane using swift heavy ions and nanoclay

Nanochannel conduction in piezoelectric polymeric membrane using swift heavy ions and nanoclay

Pyrene-Loaded Polypyrrole Microvessels

Thermostable Fluorescent Capsules with the Cross‐Linked Heterocyclic Polymer Shell from Poly(pyrrole‐phenosafranin)

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