Extended PPP model: 21A and 13B states of polydiacetylene fragments

Z. G. Soos, Sumitendra Mazumdar, S. Kuwajima

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Coulomb correlations between an extended π subsystem and localized π′ dimers are found for the 21A and 13B states of polydiacetylene (PDA) fragments. In contrast to the red shift and splitting found previously for dipole-allowed 1B excitations, π-π′ coupling blue shifts 21A and 13B but hardly affects the 13B fine structure constants. Pseudocovalent contributions to correlated states rationalize these results.

Original languageEnglish (US)
Pages (from-to)538-541
Number of pages4
JournalPhysica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
Issue number1-3
Publication statusPublished - 1986
Externally publishedYes


ASJC Scopus subject areas

  • Engineering(all)

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