Formation of High-Spin States (S = 3/2 and 2) in Linear Oligo- and Polyarylamines
PBN-AR
Instytucja
Wydział Chemiczny (Politechnika Warszawska)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Journal of Physical Chemistry B
ISSN
1520-6106
EISSN
Wydawca
American Chemical Society
DOI
Rok publikacji
2015
Numer zeszytu
42
Strony od-do
13462-13471
Numer tomu
119
Identyfikator DOI
Liczba arkuszy
0.5
Autorzy
Pozostali autorzy
+ 3
Słowa kluczowe
en
Spin dynamics; Chemical oxidation; DFT calculation; Doped polymers; Exchange coupling constants; High spin state; Nutation spectroscopy; Polyarylamines; Radical cations; Electron spin resonance spectroscopy; ESR
Streszczenia
Język
en
Treść
This article describes the study of a linear trimer and three polyarylamines PB1-3 containing a 3,4′-biphenyl ferromagnetic coupler. The synthesis of the model compound (trimer) and the polymers has been presented. The formation of radical cations was studied using electrochemical and optical (UV-vis) methods. The chemical oxidation of these compounds leads to the creation of high-spin states, evidenced by pulsed EPR nutation spectroscopy. A quartet spin state is observed for the trimer model compound, and its J exchange coupling constant has been measured experimentally (J/k = 11.8 K) and compared quantitatively to DFT calculations. Most importantly, quartet and quintet spin states have been formed for PB3 and PB2, respectively. These last two doped polymers thus exhibit the highest spin states observed to date for linear polyarylamine compounds. © 2015 American Chemical Society.
Inne
System-identifier
WUTcc6ea0ad25de42ad8a13f4448fe6f715
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