Synthesis and Magnetic Property of Poly[bis(4-methoxyphenyl)aminiumacetylene]s

Murata, Hidenori; Miyajima, Daisuke; Takada, Ryosuke; Nishide, Hiroyuki

doi:10.1295/polymj.37.818

Cited by 22 publications

(12 citation statements)

References 44 publications

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“…In the 1990's, thanks to the progress in the synthesis of conjugated polymers, several groups started to synthesize polymers with linear conjugated polymer backbones and pendant radical groups using mild conditions of polymerization such as Heck reaction, 466 metathesis 467,468 or Gilch reaction. 469 Such a strategy was reviewed by Nishide in 1995.…”

Section: High-spin Linear Oligomers and Polymersmentioning

confidence: 99%

Polymers for electronics and spintronics

et al. 2013

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This critical review is devoted to semiconducting and high spin polymers which are of great scientific interest in view of further development of the organic electronics and the emerging organic spintronic fields. Diversified synthetic strategies are discussed in detail leading to high molecular mass compounds showing appropriate redox (ionization potential (IP), electron affinity (EA)), electronic (charge carrier mobility, conductivity), optoelectronic (electroluminescence, photoconductivity) and magnetic (magnetization, ferromagnetic spin interactions) properties and used as active components of devices such as n- and p-channel field effect transistors, ambipolar light emitting transistors, light emitting diodes, photovoltaic cells, photodiodes, magnetic photoswitches, etc. Solution processing procedures developed with the goal of depositing highly ordered and oriented films of these polymers are also described. This is completed by the description of principal methods that are used for characterizing these macromolecular compounds both in solution and in the solid state. These involve various spectroscopic methods (UV-vis-NIR, UPS, pulse EPR), electrochemistry and spectroelectrochemistry, magnetic measurements (SQUID), and structural and morphological investigations (X-ray diffraction, STM, AFM). Finally, four classes of polymers are discussed in detail with special emphasis on the results obtained in the past three years: (i) high IP, (ii) high |EA|, (iii) low band gap and (iv) high spin ones.

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Section: High-spin Linear Oligomers and Polymersmentioning

confidence: 99%

Polymers for electronics and spintronics

et al. 2013

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“…Some investigations are typical examples of studies of organic mixed-valence molecules as hole transport materials to examine the intramolecular charge transfer (ICT) process, [11][12] and some are those of high-spin organic polyradicals to elucidate their stable multiredox properties of the magnetic triarylamine derivatives. [13][14][15][16][17][18][19][20][21] In comparison with the above, both these two cases incorporated "branching points" within dendrimers to link each triarylamine unit.…”

Section: Introductionmentioning

confidence: 99%

Linear Oligoarylamines: Electrochemical, EPR, and Computational Studies of Their Oxidative States

Cheng

Chiu

et al. 2015

J. Phys. Chem. A

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A series of straight-chain oligoarylamines were synthesized and examined by electrochemical, spectroelectrochemical, electron paramagnetic resonance techniques, and density functional theory (DFT) calculation. Depending on their electrochemical characteristics, these oligoarylamines were classified into two groups: one containing an odd number and the other an even number of redox centers. In the systems with odd redox centers (N1, N3, and N5), each oxidation was associated with the loss of one electron. As for the systems with even redox centers (N2, N4, and N6), oxidation occurred by taking N2 as a unit. Absorption spectra of linear oligoarylamines at various oxidative states were obtained to investigate their charge transfer behaviors. Moreover, DFT-computed isotropic hyperfine coupling constants and spin density were in accordance with the EPR experiment, and gave a close examination of oligoarylamines at charged states.

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“…The first approach was mainly developed by Nishide's group. It consists in introducing stable free radicals as pendant groups along a conducting polymer backbone that can be linear [5][6][7][8][9][10][11][12][13][14] or branched. 15,16 In polymer systems following this approach spin states as high as S = 5 were reported.…”

Section: Introductionmentioning

confidence: 99%

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

Maurel

Jouni

Baran

et al. 2012

Phys. Chem. Chem. Phys.

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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).

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Synthesis and Magnetic Property of Poly[bis(4-methoxyphenyl)aminiumacetylene]s

Cited by 22 publications

References 44 publications

Polymers for electronics and spintronics

Polymers for electronics and spintronics

Linear Oligoarylamines: Electrochemical, EPR, and Computational Studies of Their Oxidative States

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

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