New composite porphyrin-conductive polymer gas sensors for application in electronic noses

Esteves, Carina; Iglesias, Bernardo A.; Li, Rosamaria W. C.; Ogawa, Takuji; Araki, Koji; Gruber, Jonas

doi:10.1016/j.snb.2013.11.022

Cited by 51 publications

(29 citation statements)

References 19 publications

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“…Conjugated porphyrin polymers, including directly fused porphyrins,, possess fascinating electronic and optoelectronic properties that may yield electronic noses or organic solar cells with enhanced performances. However, the two main synthetic routes towards conjugated poly(porphyrins), (i) oxidative polymerization using a suitable oxidant or (ii) electrodeposition, are a major drawback to their integration into devices.…”

Section: Introductionmentioning

confidence: 99%

Conductive Directly Fused Poly(Porphyrin) Coatings by Oxidative Chemical Vapour Deposition – From Single‐ to Triple‐Fused

et al. 2019

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While the solution‐phase synthesis of directly fused porphyrin tapes has been successfully developed in recent years, the deposition of these promising compounds in thin film form has remained a challenge. In this study, we report the simultaneous synthesis and deposition of conductive directly fused poly(porphyrin) coatings based on a substrate independent and up‐scalable oxidative chemical vapor deposition (oCVD) approach. A particular emphasis is given to the selection and sublimation conditions of the oxidant. The direct fusion of nickel(II) 5,15‐(diphenyl)porphyrin (NiDPP) is successfully achieved using three different oxidants, namely iron(III) chloride (FeCl3), copper(II) chloride (CuCl2) and copper(II) perchlorate hexahydrate (Cu(ClO4)2·6H2O). FeCl3 is demonstrated as the most suitable oxidant, allowing the formation of mainly singly‐fused poly(NiDPP) or conductive mainly doubly or triply‐fused poly(NiDPP) that strongly absorb in the NIR. High‐resolution mass spectrometry evidences the chlorination of the formed compounds as a side reaction. This chlorination can either be considered as a drawback by preventing the formation of large directly fused NiDPP oligomers or as an asset when targeting the formation of fully insoluble directly fused poly(NiDPP) coatings. Overall, the described oCVD approach opened up the possibility to tune the band gap, conductivity, and solubility of directly fused P(NiDPP) coatings.

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Section: Introductionmentioning

confidence: 99%

Conductive Directly Fused Poly(Porphyrin) Coatings by Oxidative Chemical Vapour Deposition – From Single‐ to Triple‐Fused

et al. 2019

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“…In a previous paper, 15 we first reported a new type of composite layer to be used in e-noses: a single conductive polymer had its chemiresistive behavior modulated by chemical interaction with different porphyrins, generating independent analytical signals and, therefore, producing a rich pattern for each analyte studied. As a proof of concept, an e-nose formed by these three sensors was used for classifying four volatile organic solvents (propanone, ethanol, ethyl acetate, and toluene).…”

Section: Introductionmentioning

confidence: 99%

Identification of Tobacco Types and Cigarette Brands Using an Electronic Nose Based on Conductive Polymer/Porphyrin Composite Sensors

et al. 2018

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Three tobacco types (Burley, Flue Cured, and Oriental) and eight cigarette brands were unequivocally identified using an electronic nose formed by only three sensors based on a single novel conducting polymer (PF-BTB) doped with different porphyrins (H2TPP, H2TPFP, and H2BTBOP). The synthesis and characterization of the polymer are also discussed. Small changes in the porphyrin structure caused significant changes in the electrical conductance response patterns of the sensors upon exposure to complex chemical matrixes, representing a novel approach for tuning the selectivity of chemiresistive sensors for e-nose application. This e-nose is fast, cheap, reliable, can be easily operated, and could be a valuable tool for border agents fighting cigarette smuggling around the world, helping them prevent losses of millions in tax revenues and sales.

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“…The so‐called electronic noses based on hybrid conductive polymers doped with porphyrins that are chemiresistive gas sensors, changing their conductance in the presence of volatile substances, have been shown to be efficient for the identification of volatile solvents, especially when using non‐metallated porphyrins …”

Section: Introductionmentioning

confidence: 99%

Hybrids formed between polyvinylpyrrolidone and an A₃B porphyrin dye: behaviour in aqueous solutions and chemical response to CO₂ presence

Fagadar‐Cosma

Тарабукина

Захарова

et al. 2015

Polymer International

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This study reports the incorporation of an A 3 B mixed functionalized porphyrin, namely 5-(4-pyridyl)-10,15,20-tris(4-phenoxyphenyl)porphyrin (PyTPOPP), into polyvinylpyrrolidone (PVP), a biocompatible polymer, with the purpose of preparing water-soluble polymer-dye (PVP-PyTPOPP) hybrids. The hybrids were obtained in two variants, differing by molar ratios, and their molecular characteristics and aggregation in dilute aqueous solutions were investigated using static and dynamic light scattering and analytical ultracentrifugation methods. The hybrids were characterized using 1 H NMR, UV-visible and Fourier transform infrared spectroscopies, atomic force microscopy (AFM) and transmission electron microscopy (TEM). A study of the influence of acidic media on the electronic spectra was carried out, evidencing the similar behaviour of the hybrids and the bare porphyrin. The interaction between CO 2 and the PVP-PyTPOPP hybrids was studied using UV-visible spectroscopy and a continuous hypochromic response of the Soret band in direct relationship with increased CO 2 concentration was noticed. Based on the UV-visible spectral differences between the PVP-PyTPOPP hybrids in acidic media and during CO 2 exposure, we can presume that the mechanism of CO 2 detection is not based on pH changes of the solution but on chemisorption phenomena which modify the surface properties as confirmed by TEM and AFM. These porphyrin-PVP hybrid nanomaterials offer the possibility for achieving optical and colorimetric sensors for monitoring CO 2 and are also promising for biomedical applications.

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New composite porphyrin-conductive polymer gas sensors for application in electronic noses

Cited by 51 publications

References 19 publications

Conductive Directly Fused Poly(Porphyrin) Coatings by Oxidative Chemical Vapour Deposition – From Single‐ to Triple‐Fused

Conductive Directly Fused Poly(Porphyrin) Coatings by Oxidative Chemical Vapour Deposition – From Single‐ to Triple‐Fused

Identification of Tobacco Types and Cigarette Brands Using an Electronic Nose Based on Conductive Polymer/Porphyrin Composite Sensors

Hybrids formed between polyvinylpyrrolidone and an A₃B porphyrin dye: behaviour in aqueous solutions and chemical response to CO₂ presence

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New composite porphyrin-conductive polymer gas sensors for application in electronic noses

Cited by 51 publications

References 19 publications

Conductive Directly Fused Poly(Porphyrin) Coatings by Oxidative Chemical Vapour Deposition – From Single‐ to Triple‐Fused

Conductive Directly Fused Poly(Porphyrin) Coatings by Oxidative Chemical Vapour Deposition – From Single‐ to Triple‐Fused

Identification of Tobacco Types and Cigarette Brands Using an Electronic Nose Based on Conductive Polymer/Porphyrin Composite Sensors

Hybrids formed between polyvinylpyrrolidone and an A3B porphyrin dye: behaviour in aqueous solutions and chemical response to CO2 presence

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Hybrids formed between polyvinylpyrrolidone and an A₃B porphyrin dye: behaviour in aqueous solutions and chemical response to CO₂ presence