Syntheses, characterisations and X-ray crystal structures of 5,5′-bis(diphenylphosphino)2,2′-bithiophene derivatives, Ph2(X)P(C4H2S)2P(X)Ph2 (X = O, S and CH3+ · I-)

Academic Article


  • Phosphine-substituted oligothiophenes are interesting third-order nonlinear materials. Both their linear and nonlinear optical properties can be altered by varying the group attached to the nonbonding pair of electrons on the phosphorus atoms, the number of phosphine groups attached to the oligothiophene and the number of repeat units in the oligothiophene. In this article, we report the syntheses, multinuclear NMR spectroscopic characterizations and X-ray crystal structures for three derivatives of 5,5′-bis(diphenylphosphino)-2,2′-bithiophene, Ph2(X)P(C4H2S)2P(X)Ph2 (X =-, 1) in which X is O (2), S (3) and CH3+ · I- (4). The X-ray crystal structures exhibit significantly different π-π stacking, suggesting that these compounds could have significantly different nonlinear optical properties in the solid state.
  • Published In

    Digital Object Identifier (doi)

    Pubmed Id

  • 14737178
  • Author List

  • Zhao Q; Owens SB; Gray GM; Wang J; Lawson CM
  • Start Page

  • 215
  • End Page

  • 229
  • Volume

  • 6
  • Issue

  • 3-4