Syntheses, and optical, fluorescence, and nonlinear optical characterization of phosphine-substituted terthiophenes.

Earlier studies of phosphine-substituted terthiophenes have demonstrated that some of these materials exhibit nonlinear absorption at 532 nm. However, this wavelength is significantly removed from the linear absorption maxima of the complexes, suggesting that better nonlinear absorption might be observed at wavelengths closer to the linear absorption maxima. To investigate this possibility, a library of compounds has been prepared either by varying the group attached to the nonbonding pair of electrons on the phosphorus atoms of 5,5''-bis(diphenylphosphino)-2,2':5',2''-terthiophene (PT(3)P), or by introducing additional substituents on the 5''-position of 5-(diphenylphosphino)-2,2':5',2''-terthiophene (PT(3)).

Synthesis and complexation of heptafluoroisopropyldiphenylphosphine.

We report a one-step synthesis of the phosphine, PPh(2)(i)C(3)F(7) from commercially available precursors. The stereoelectronic properties of the phosphine were probed by coordination to transition metals. Mo(CO)(5)PPh(2)(i)C(3)F(7) was synthesised and the synthesis and structure of trans-PtCl(2)(PPh(2)(i)C(3)F(7))(2) are described.

The synthesis of tris(perfluoroalkyl)phosphines.

Tris(perfluoroalkyl)phosphines, of interest as tunable alternatives to the carbon monoxide ligand, can be synthesised by the nucleophile mediated reaction of perfluoroalkyltrimethylsilanes with triphenylphosphite; the method can be extended to diphosphines.