FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2565047741> ?p ?o ?g. }

• W2565047741 abstract "Polyacetylene (PA) is a widely used conjugated polymer and a convenient model system allowing for calculation of its physical characteristics [i, 2]. Pure PA is a dielectric, but its conductivity sharply increases upon chemical and electrochemical doping and can reach values characteristic of metallic conductivity. The conduction mechanism for doped PA has been discussed in terms of three basic models: the soliton model [i, 2], the hopping model [3], and the model based on tunneling of electrons between regions with metallic conductivity [4]. To some degree, all three models use ideas about the intrinsic and extrinsic (impurity) defect structure of PA. This paper is devoted to consideration of some basic microdefects of the trans-PA chain, i.e., the first level in the hierarchy of defects in the structure of the material [5]. A distinguishing feature of trans-PA is the degeneracy of the ground state for its chain. This allows us to very simply and systematically use the topological approach, in particular the theory of dislocations and disclinations in an elastic continuum [6-8]. The structures of ideal chains, and also the basic defects in chains (the cis segment C, the anticis segment C, the soliton S, the antisoliton S) are presented in Fig. i. Note that the indicated defects divide the macromolecule into two mirror-symmetric parts R and L with identical energies. The point dislocations D (a shift of part of the macromolecule with subsequent incorporation of a fragment with one carbon atom [9]) do not lead to a change in the chain symmetry, but they are connected with electronic excitation since they have an unpaired electron. In the continuum approximation, the defects CL and CR are internal disclination loops having two components: a wedge loop of ~ of strength ~/3 and a twist loop ~ of strength z. We emphasize that the Frank vectors of the indicated disclination loops are applied to the center of the single and double carbon-carbon bonds respectively for CL and CR. For GL and CR, the wedge disclination loops have strength -~/3; therefore for brevity we will use the prefix anti in this case. The twist disclination loops for these defects have stength ~. A soliton is a defect of a more complicated topological nature. In an ideal chain, it is obtained by combination of a point dislocation D (and therefore the electronic excitation connected with it) with Burgers vector modulus }~a/2 ( a is the length of the carbon-carbon bond) and an external twist dislocation loop of strength ~, the rotation vector of which is" @default.
• W2565047741 created "2017-01-06" @default.
• W2565047741 creator A5005729145 @default.
• W2565047741 creator A5090206252 @default.
• W2565047741 date "1989-01-01" @default.
• W2565047741 modified "2023-09-26" @default.
• W2565047741 title "Using a topological approach, we consider the nature of intrinsic structural de- fects in a real trans-polyacetyl ene chain. We show that remnant cis segments are internaldisclina tion loops having two components: a wedge loop of strengthand a twist loop of strength ~, while defects of the soliton type are a combination of a point dislocation and an external twist disclination loop of strength z." @default.
• W2565047741 cites W1997445344 @default.
• W2565047741 cites W2004515385 @default.
• W2565047741 cites W2042279354 @default.
• W2565047741 cites W2047790134 @default.
• W2565047741 cites W2064216369 @default.
• W2565047741 cites W2082105651 @default.
• W2565047741 cites W2093337388 @default.
• W2565047741 hasPublicationYear "1989" @default.
• W2565047741 type Work @default.
• W2565047741 sameAs 2565047741 @default.
• W2565047741 citedByCount "0" @default.
• W2565047741 crossrefType "journal-article" @default.
• W2565047741 hasAuthorship W2565047741A5005729145 @default.
• W2565047741 hasAuthorship W2565047741A5090206252 @default.
• W2565047741 hasConcept C104862878 @default.
• W2565047741 hasConcept C114614502 @default.
• W2565047741 hasConcept C120398109 @default.
• W2565047741 hasConcept C121332964 @default.
• W2565047741 hasConcept C158622935 @default.
• W2565047741 hasConcept C184720557 @default.
• W2565047741 hasConcept C192562407 @default.
• W2565047741 hasConcept C199185054 @default.
• W2565047741 hasConcept C26873012 @default.
• W2565047741 hasConcept C2775988048 @default.
• W2565047741 hasConcept C33923547 @default.
• W2565047741 hasConcept C57863236 @default.
• W2565047741 hasConcept C62520636 @default.
• W2565047741 hasConcept C87651913 @default.
• W2565047741 hasConceptScore W2565047741C104862878 @default.
• W2565047741 hasConceptScore W2565047741C114614502 @default.
• W2565047741 hasConceptScore W2565047741C120398109 @default.
• W2565047741 hasConceptScore W2565047741C121332964 @default.
• W2565047741 hasConceptScore W2565047741C158622935 @default.
• W2565047741 hasConceptScore W2565047741C184720557 @default.
• W2565047741 hasConceptScore W2565047741C192562407 @default.
• W2565047741 hasConceptScore W2565047741C199185054 @default.
• W2565047741 hasConceptScore W2565047741C26873012 @default.
• W2565047741 hasConceptScore W2565047741C2775988048 @default.
• W2565047741 hasConceptScore W2565047741C33923547 @default.
• W2565047741 hasConceptScore W2565047741C57863236 @default.
• W2565047741 hasConceptScore W2565047741C62520636 @default.
• W2565047741 hasConceptScore W2565047741C87651913 @default.
• W2565047741 hasLocation W25650477411 @default.
• W2565047741 hasOpenAccess W2565047741 @default.
• W2565047741 hasPrimaryLocation W25650477411 @default.
• W2565047741 hasRelatedWork W1964661978 @default.
• W2565047741 hasRelatedWork W1965546974 @default.
• W2565047741 hasRelatedWork W2038445781 @default.
• W2565047741 hasRelatedWork W2069096369 @default.
• W2565047741 hasRelatedWork W2090304807 @default.
• W2565047741 hasRelatedWork W2292488189 @default.
• W2565047741 hasRelatedWork W2524124729 @default.
• W2565047741 hasRelatedWork W2607215593 @default.
• W2565047741 hasRelatedWork W2739683425 @default.
• W2565047741 hasRelatedWork W2775268721 @default.
• W2565047741 hasRelatedWork W2792915486 @default.
• W2565047741 hasRelatedWork W2883210236 @default.
• W2565047741 hasRelatedWork W2941133951 @default.
• W2565047741 hasRelatedWork W2995591814 @default.
• W2565047741 hasRelatedWork W3005164043 @default.
• W2565047741 hasRelatedWork W3158625549 @default.
• W2565047741 hasRelatedWork W3169201765 @default.
• W2565047741 hasRelatedWork W3196532554 @default.
• W2565047741 hasRelatedWork W3204340974 @default.
• W2565047741 hasRelatedWork W1970048555 @default.
• W2565047741 isParatext "false" @default.
• W2565047741 isRetracted "false" @default.
• W2565047741 magId "2565047741" @default.
• W2565047741 workType "article" @default.