Synthesis of a novel poly(p-phenylene-vinylene) derivative and its application in chemiresistive sensors for electronic noses with an unusual response to organic vapours

Abstract

Abstract:We report the synthesis of a novel poly(p-phenylene-vinylene) derivative bearing dodecanoylsulfanyl side-groups (12COS-PPV). Good solubility in organic solvents was achieved. The average molecular weight was around 30 000, the energy gap 2.8 eV and the thermal stability up to 130°C. Doping with iodine vapours rose conductivity to 2·10 -6 S/cm. Gas sensors made from FeCl 3 -doped 12COS-PPV showed an unusual behaviour responding to only four of the eight different organic solvent vapours tested. Recoveries from the responses are not complete, but are reproducible and can be used to discriminate between the four solvents. Quantitative analyses are also possible since there is a good linear correlation between relative response and concentration.

Conductive polymer gas sensor for quantitative detection of methanol in Brazilian sugar-cane spirit

“…Poly(2-dodecanoylsulfanyl-p-phenylenevinylene) (12COS-PPV), was synthesised from commercial 2,5-dimethylbenzenethiol (Aldrich, 98%) in three steps as previously described in the literature (Gruber et al, 2004). The polymerisation step was carried out electrochemically (Utley & Gruber, 2002) at a controlled potential of 1.41 V vs. Ag/AgBr.…”

“…The development of chemiresistors sensitive to organic vapours, based on metal-oxide semiconductors (MOS) (Gardner & Bartlett, 1999;Stephan, Bücking, & Steinhart, 2000), MOS field-effect transistors (MOSFET) (Naessens & Tran-Minh, 1998;Gardner & Bartlett, 1999), and electrically conductive polymers has been described (Benvenho, Li, & Gruber, 2009;Gardner & Bartlett, 1999;Gruber, Yoshikawa, Bao, & Geise, 2004;Li, Ventura, Gruber, & Carvalho, 2009;Li, Ventura, Gruber, Kawano, & Carvalho, 2008;Péres & Gruber, 2007;Rosa, Szulc, Li, & Gruber, 2005;Vanneste, De Wit, Eyckmans, & Geise, 1998). The advantages of the latter are that they operate at room temperature with very low power doi:10.1016/j.foodchem.2011.08.014 ⇑ Corresponding authors.…”

A selective conductive polymer-based sensor for volatile halogenated organic compounds (VHOC)

“…Recently, studies have been carried out using poly(p-phenylenevinylene)s (PPVs) in gas-sensitive chemoresistors which responded with high selectivity to several organic solvents [15][16][17]. These studies usually involve several VOCs as alcohols, diethylether, acetone, toluene, etc., but only one VHOC, either chloroform [12,14] or tetrachloromethane [10].…”

Síntese de poli(1,1'-ferrocenilenovinileno) via acoplamento de McMurry

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dispositivos eletroluminescentes [15] e, mais recentemente, com células solares [16] , transistores magnéticos [17][18][19] e narizes eletrônicos [20][21][22] . A combinação da eletroafinidade dos metais de transição com as propriedades eletrônicas dos polímeros conjugados é uma estratégia atrativa para gerar polímeros híbridos, combinando propriedades físicas, eletrônicas e magnéticas propícias para diversas aplicações.

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