Mildly-doped polythiophene with triflates for molecular recognition

Boujnah, Aicha; Boubaker, Aimen; Kalboussi, Adel; Lmimouni, Kamal; Pecqueur, Sebastien

Document type :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1016/j.synthmet.2021.116890

Title :

Mildly-doped polythiophene with triflates for molecular recognition

Author(s) :

Boujnah, Aicha [Auteur]
Université de Monastir - University of Monastir [UM]
Boubaker, Aimen [Auteur]
Université de Monastir - University of Monastir [UM]
Kalboussi, Adel [Auteur]
Université de Monastir - University of Monastir [UM]
Lmimouni, Kamal [Auteur]

Ecole nationale supérieure Mines-Télécom Lille Douai [IMT Nord Europe]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Nanostructures, nanoComponents & Molecules - IEMN [NCM - IEMN]
Pecqueur, Sebastien [Auteur correspondant]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Nanostructures, nanoComponents & Molecules - IEMN [NCM - IEMN]

Journal title :

Synthetic Metals

Pages :

116890

Publisher :

Elsevier

Publication date :

2021-10

ISSN :

0379-6779

English keyword(s) :

conducting polymer
sensing array
p-dopant
principal component analysis
molecular recognition

HAL domain(s) :

Chimie/Polymères
Chimie/Chimie analytique

English abstract : [en]

Organic semiconductors have enough molecular versatility to feature chemo-specific electrical sensitivity to large families of chemical substituents via different intermolecular bonding modes. This study demonstrates that ...
Show more >Organic semiconductors have enough molecular versatility to feature chemo-specific electrical sensitivity to large families of chemical substituents via different intermolecular bonding modes. This study demonstrates that one single conducting polymer can be tuned to either discriminate water-, ethanol-or acetone-vapors, on demand, by changing the nature of its dopant. Seven triflate salts differ from mild to strong p-dopant on poly(3hexylthiophene) sensing micro-arrays. Each material shows a pattern of conductance modulation for the polymer which is reversible, reproducible, and distinctive of other gas exposures. Based on principal component analysis, an array doped with only two different triflates can be trained to reliably discriminate gases, which re-motivates using conducting polymers as a class of materials for integrated electronic noses. More importantly, this method points out the existence of tripartite donor-acceptor charge-transfer complexes responsible for chemospecific molecular sensing. By showing that molecular acceptors can have duality to p-dope semiconductors and to coordinate donor gases, such behavior can be used to understand the role of frontier orbital overlapping in organic semiconductors, the formation of charge-transfer complexes via Lewis acid-base adducts in molecular semiconductors.Show less >

Language :

Anglais

Popular science :

Non

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