Spectroelectrochemical properties of the poly[(2,5-bisoctyloxy)-1,4-phenylenevinylene]/single-walled carbon nanotube composite

Baibarac, M.; Baltog, I.; Smaranda, Ion; Ilie, Mirela; Scocioreanu, M.; Mevellec, Jean‐Yves; Lefrant, S.

doi:10.1016/j.synthmet.2014.06.010

Cited by 6 publications

(8 citation statements)

References 31 publications

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“…2(c)). 47,48 Besides, the appearance of two characteristic IR peaks of b-CD at 1157 and 1032 cm À1 and the peak of C-O at 947 cm À1 certies the successful decoration of b-CD onto the SN surface as well (Fig. 2(a and c)).…”

Section: Characterization Of Nanoparticlesmentioning

confidence: 92%

“…33 The peak centered at 2575 cm À1 in the Raman spectra ( Fig. 47,48 Besides, the appearance of two characteristic IR peaks of b-CD at 1157 and 1032 cm À1 and the peak of C-O at 947 cm À1 certies the successful decoration of b-CD onto the SN surface as well ( Fig. 46 The IR peaks at 756 and 669 cm À1 , corresponding to C-S-C and C-S, respectively, provide the evidence for the successful synthesis of SN-b-CD through the reaction between SN-MPTMS and 6-OTS-b-CD as shown in Fig.…”

Section: Characterization Of Nanoparticlesmentioning

confidence: 99%

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β-Cyclodextrin modified silica nanoparticles for Nafion based proton exchange membranes with significantly enhanced transport properties

et al. 2015

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In the current study, a composite proton exchange membrane (PEM) was prepared by incorporating bcyclodextrin (b-CD) modified silica nanoparticles (SN-b-CD) into a Nafion matrix. Due to the decoration of b-CD on the SN surface, SN-b-CD possesses excellent compatibility with the Nafion polymer, resulting in a good dispersibility inside the membrane matrix. SN-b-CD brings a better water retention capability for the composite PEM and hence significantly improves the proton conductivity of the composite PEM. Simultaneously, the barrier effect of SN-b-CD which increases the tortuosity of transport channels for bulk methanol leads to an evident reduction in methanol permeability. Herein, a nearly two-order-of-magnitude promotion in membrane selectivity (i.e. the ratio of proton conductivity to membrane permeability) was achieved even under crucial conditions at elevated temperatures or high methanol concentrations.

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Section: Characterization Of Nanoparticlesmentioning

confidence: 92%

Section: Characterization Of Nanoparticlesmentioning

confidence: 99%

β-Cyclodextrin modified silica nanoparticles for Nafion based proton exchange membranes with significantly enhanced transport properties

et al. 2015

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“…Few papers focused on the Raman scattering and PL studies on SWNTs enriched in S and M tubes functionalized with CPs. These papers concern macromolecular compounds polydiphenylamine (PDPA), 11 poly[(2,5-bisoctyloxy)-1,4-phenylene-vinylene] (BO-PPV), 12 and poly(2,2′bithiophene-co-pyrene) (PBTh-Py). 13 In the three cases, (i) a covalent functionalization of SWNTs with macromolecular compounds was demonstrated by Raman spectroscopy and (ii) a PL quenching process of composites based on PBTh-Py, PDPA, and BO-PPV and SWNTs enriched in M or S tubes, which manifests differently for the two types of nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Influence of Single-Walled Carbon Nanotubes Enriched in Semiconducting and Metallic Tubes on the Vibrational and Photoluminescence Properties of Poly(para-phenylenevinylene)

et al. 2016

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A new synthesis method based on the electrochemical reduction of α,α,α′,α′-tetrabromo-p-xylene in the presence of single-walled carbon nanotubes (SWNTs) is used to obtain composites of carbon nanotubes (CNTs) functionalized with poly(para-phenylenevinylene) (PPV). To separate the effects of metallic and semiconducting CNTs on their interaction with PPV, the experiments are carried out with SWNTs enriched in semiconducting (S, 99%) and metallic (M, 98%) tubes. Significant changes in the relative intensity and shift of the radial breathing vibrational mode are reported in the Raman spectra of the as-prepared SWNTs samples, i.e., as mixtures of metallic (33%) and semiconducting (66%) entities and SWNTs enriched in M tubes (98%) that result from the electrofunctionalization with PPV. This different behavior originates in the noncovalent and covalent functionalization of SWNTs enriched in M and S SWNTs tubes with PPV, respectively. A gradual decrease in the absorption of the infrared (IR) bands of PPV situated in the spectral range of 750–1000 cm–1 as a result of the increase of the polymer weight on the blank Au support is reported. The electrofunctionalization of the as-prepared SWNTs induces position changes of the PPV IR absorption bands. In the presence of S-enriched SWNTs, a significant increase in the absorbance of the two IR bands peaked at 1452 and 1471 cm–1, which are assigned to the vibrational modes of the phenyl ring stretching and the quinoid structure of the PPV, respectively, is reported. This results from the covalent bonding of the PPV macromolecular chains onto the surface of the SWNTs enriched in S tubes. Our results also demonstrate that the photoluminescence quenching effect reported for the PPV/SWNTs composites is due to the metallic nanotubes.

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“…Likewise, we can see the appearance of a new band in this same spectrum at approximately 681 cm −1 , which is assigned to the S‐C‐C‐S vibrations characteristic of the bithiophene and polythiophene systems 74,75 . The abovementioned results are strictly related to the increase in the signal intensity of the peak at 1427 cm −1 , indicating that the polymerization of these systems is directly affected by the thiophene heterocycle, specifically by its 2,2′ positions, as shown in Scheme 2 76 …”

Section: Resultsmentioning

confidence: 63%

Synthesis and characterization of a new benzobisoxazole/thiophene derivative polymer and the effect of the substituent on the push/pull properties

Ahumada

Soto

Alemán

et al. 2021

Journal of Polymer Science

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Conducting polymer synthesis of a new benzobisoxazole/thiophene derivative is reported. The conjugated co‐polymer presents the lowest bandgap (1.78 eV) reported for a neutral benzobisoxazole/thiophene polymer. Electrochemical polymerization is carried out by cyclic voltammetry, and the new conducting polymer is characterized by Raman spectroscopy and X‐ray photoelectron spectroscopy. The results indicate that the coupling of the monomer unit occurs at the 2,2′ positions of the thiophene ring. Theoretical studies in derivatives of this family of compounds are conducted to validate the effect on the bandgap modulation due to the change in the substituent on the phenyl moiety of the monomer. The comparison between experimental and theoretical properties shows the substituents impact on the optical properties of the system, and its viability to be used in sensors.

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Spectroelectrochemical properties of the poly[(2,5-bisoctyloxy)-1,4-phenylenevinylene]/single-walled carbon nanotube composite

Cited by 6 publications

References 31 publications

β-Cyclodextrin modified silica nanoparticles for Nafion based proton exchange membranes with significantly enhanced transport properties

β-Cyclodextrin modified silica nanoparticles for Nafion based proton exchange membranes with significantly enhanced transport properties

Influence of Single-Walled Carbon Nanotubes Enriched in Semiconducting and Metallic Tubes on the Vibrational and Photoluminescence Properties of Poly(para-phenylenevinylene)

Synthesis and characterization of a new benzobisoxazole/thiophene derivative polymer and the effect of the substituent on the push/pull properties

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