Electrical and magnetic properties of polyarylenequinones

Dulov, A. A.; Liogon'kii, B.I.; Ragimov, A.V.; Slinkin, A. A.; Берлин, А. А.

doi:10.1007/bf00846503

Cited by 3 publications

(1 citation statement)

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“…Thus, it is not surprising that the residual spin is almost absent in neutral or acidic forms of lignin in whole wood and even native lignin, which shows only a small amount, as opposed to chemically modified lignins. This type of persistent radicals could be generated because of a small equilibrium concentration of I in equation A (Scheme ), or from a semiquinone polymer matrix containing electron donor–acceptor groups, or radicals stabilized within the polymeric network …”

Section: Origin Of Stable Radicals In Ligninsupporting

confidence: 86%

Stable Organic Radicals in Lignin: A Review

Patil

Argyropoulos

2017

ChemSusChem

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Lignin and the quest for the origin of stable organic radicals in it have seen numerous developments. Although there have been various speculations over the years on the formation of these stable radicals, researchers have not been able to arrive at a solid, unequivocal hypothesis that applies to all treatments and types of lignin. The extreme complexity of lignin and its highly aromatic, cross-linked, branched, and rigid structure has made such efforts rather cumbersome. Since the early 1950s, researchers in this field have dedicated their efforts to the establishment of methods for the detection and determination of spin content, theoretical simulations, and reactions on model compounds and spin-trapping studies. Although a significant amount of published research is available on lignin or its model compounds and the reactive intermediates involved during various chemical treatments (pulping, bleaching, extractions, chemical modifications, etc.), the literature provides a limited view on the origin, nature, and stability of such radicals. Consequently, this review is focused on examining the origin of such species in lignin, factors affecting their presence, reactions involved in their formation, and methods for their detection.

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Section: Origin Of Stable Radicals In Ligninsupporting

confidence: 86%

Stable Organic Radicals in Lignin: A Review

Patil

Argyropoulos

2017

ChemSusChem

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Electronic Properties and Structure of Polymeric Organic Semiconductors

Dulov¹

1966

Russ. Chem. Rev.

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The state-selective dissociation dynamics for anionic and excited neutral fragments of gaseous SiCl 4 following Cl 2p and Si 2p core-level excitations were characterized by combining measurements of the photoninduced anionic dissociation, x-ray absorption and UV/visible dispersed fluorescence. The transitions of core electrons to high Rydberg states/doubly excited states in the vicinity of both Si 2p and Cl 2p ionization thresholds of gaseous SiCl 4 lead to a remarkably enhanced production of anionic, Si − and Cl − , fragments and excited neutral atomic, Si * , fragments. This enhancement via core-level excitation near the ionization threshold of gaseous SiCl 4 is explained in terms of the contributions from the Auger decay of doubly excited states, shake-modified resonant Auger decay, or/and post-collision interaction. These complementary results provide insight into the state-selective anionic and excited neutral fragmentation of gaseous molecules via core-level excitation.

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Electrical and Photoelectric Properties of Organic Polymeric Semiconductors

Myl'nikov¹

1968

Russ. Chem. Rev.

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Electrical and magnetic properties of polyarylenequinones

Cited by 3 publications

References 0 publications

Stable Organic Radicals in Lignin: A Review

Stable Organic Radicals in Lignin: A Review

Electronic Properties and Structure of Polymeric Organic Semiconductors

Electrical and Photoelectric Properties of Organic Polymeric Semiconductors

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