Adsorption of Gaseous Propylamine on Films of Polypyrrole in Different Oxidation States

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Title:Adsorption of Gaseous Propylamine on Films of Polypyrrole in Different Oxidation States
Creators:
Papež, Vítězslav
Brodská, Šárka
Langmaier, Jan
Samec, Zdeněk
Potje-Kamloth, Karin
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 64, 1, pp. 1-12
Uncontrolled Keywords:Electropolymerization, Quartz crystal microbalance, Kelvin probe, Polypyrrole-based sensors, Propylamine detection

Abstract

Quartz crystal microbalance and Kelvin probe were used to investigate the interaction between propylamine (PrNH<sub>2</sub>) vapour and polypyrrole (PPy) films. The films were prepared by oxidative electropolymerization of pyrrole on a platinum electrode in acetonitrile solution. The nature of interaction is strongly influenced by the oxidation state of the film and co-adsorption of water. On the surface of the oxidized PPy, water adsorbs to form a multilayer. The work function increase of the Pt/PPy electrode exposed to both water and PrNH<sub>2</sub> vapoures was attributed to the PrNH<sub>2</sub> dissolution and dissociation within the water layer followed by the formatted PrNH<sub>3</sub><sup>+</sup> cation adsorption on the liquid surface with the alkyl group facing the gas phase. On the contrary, the water adsorption on the reduced PPy is rather weak and the work function decrease observed at the PrNH<sub>2</sub> exposure might be connected with the neutral molecules adsorption directly on the polymer surface. The water co-adsorption is documented by a drop in the adsorption of PrNH<sub>2</sub> upon lowering the water vapour pressure in the gas phase. <p>

Title:Adsorption of Gaseous Propylamine on Films of Polypyrrole in Different Oxidation States
Creators:
Papež, Vítězslav
Brodská, Šárka
Langmaier, Jan
Samec, Zdeněk
Potje-Kamloth, Karin
Uncontrolled Keywords:Electropolymerization, Quartz crystal microbalance, Kelvin probe, Polypyrrole-based sensors, Propylamine detection
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:64
Number:1
Page Range:pp. 1-12
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19990001UNSPECIFIED
ID Code:1452
Item Type:Article
Deposited On:06 Feb 2009 17:09
Last Modified:06 Feb 2009 16:09

Citation

Papež, Vítězslav; Brodská, Šárka; Langmaier, Jan; Samec, Zdeněk; Potje-Kamloth, Karin (1999) Adsorption of Gaseous Propylamine on Films of Polypyrrole in Different Oxidation States. Collection of Czechoslovak Chemical Communications, 64 (1). pp. 1-12. ISSN 0010-0765

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