Nonlinear optical properties of nitro-aniline and methyl-aniline compounds - an exact correction vector INDO-SDCI study

Z. Shuai, S. Ramasesha, J. L. Brédas

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We have applied the correction vector (CV) method coupled with the intermediate neglect of differential overlap-single and double configuration interaction semiempirical approach to calculate the nonlinear optical coefficients of donor-acceptor conjugated compounds consisting in ortho-, meta-, and para-substituted benzene derivatives as well as the corresponding octupolar molecules. The CV method has been shown to be both exact and computationally effective. We find that for weak donors such as a methyl group, the NLO response efficiency orders as: octu > para > meta > ortho; however, if the donor becomes stronger and consists in an amino group, then: para > ortho > meta > octu. The results are in agreement with experimental findings and can be rationalized in terms of a competition between the effects related to structural resonance and charge separation length.

Original languageEnglish (US)
Pages (from-to)14-18
Number of pages5
JournalChemical Physics Letters
Volume250
Issue number1
DOIs
StatePublished - Feb 16 1996
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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