MersV1, Main, Exploration, bibRecord, 002236

Magnetic properties of a doped linear polyarylamine bearing a high concentration of coupled spins (S = 1).

Identifieur interne : 002236 ( Main/Exploration ); précédent : 002235; suivant : 002237

Magnetic properties of a doped linear polyarylamine bearing a high concentration of coupled spins (S = 1).

Auteurs : Vincent Maurel [France] ; Mohammad Jouni ; Piotr Baran ; Nicolas Onofrio ; Serge Gambarelli ; Jean-Marie Mouesca ; David Djurado ; Lionel Dubois ; Jean-François Jacquot ; Gérard Desfonds ; Irena Kulszewicz-Bajer

Source :

Physical chemistry chemical physics : PCCP [ 1463-9084 ] ; 2012.

RBID : pubmed:22146900

Abstract

Magnetic properties of a doped linear polyarylamine (PA2), whose chain includes alternating para-phenylene and meta-phenylene groups, and of two cyclic and linear model compounds (C2 and D2) were explored by pulsed-EPR nutation spectroscopy, SQUID magnetometry and DFT calculations. Stoichiometrically doped PA2 samples exhibit a pure S = 1 state (exchange coupling constant J = 18 K) with a high spin concentration (0.65) corresponding to 65% of mers bearing holes. Such properties were already observed for doped reticulated polyarylamines but are quite unusual for doped linear polyarylamines. In order to better understand the properties of PA2, model compounds C2 and D2 were also investigated: pure S = 1 spin states could also be obtained, but with higher J (respectively 57 K and 35 K) and, surprisingly, with high but still limited spin concentrations (respectively 0.77 and 0.65).

DOI: 10.1039/c1cp22766a
PubMed: 22146900

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">Magnetic properties of a doped linear polyarylamine (PA2), whose chain includes alternating para-phenylene and meta-phenylene groups, and of two cyclic and linear model compounds (C2 and D2) were explored by pulsed-EPR nutation spectroscopy, SQUID magnetometry and DFT calculations. Stoichiometrically doped PA2 samples exhibit a pure S = 1 state (exchange coupling constant J = 18 K) with a high spin concentration (0.65) corresponding to 65% of mers bearing holes. Such properties were already observed for doped reticulated polyarylamines but are quite unusual for doped linear polyarylamines. In order to better understand the properties of PA2, model compounds C2 and D2 were also investigated: pure S = 1 spin states could also be obtained, but with higher J (respectively 57 K and 35 K) and, surprisingly, with high but still limited spin concentrations (respectively 0.77 and 0.65).</div>
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Magnetic properties of a doped linear polyarylamine bearing a high concentration of coupled spins (S = 1).

Magnetic properties of a doped linear polyarylamine bearing a high concentration of coupled spins (S = 1).

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Abstract

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