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RESEARCH PRODUCT
Tetrahedra from Aryleneethenylenes – From small Molecules to Luminescent Glasses
Heiner DetertO. SadovskiErli Sugionosubject
Crystallographychemistry.chemical_compoundMaterials sciencechemistryAtomTetrahedronConjugated systemChromophoreLuminescenceSmall moleculeSpectral lineTetraphenylmethanedescription
AbstractThe fourfold Horner olefination of tetraphenylmethane or –silane with fourp-methyl- phosphonate groups and a variety of aromatic aldehydes with donor groups or extended conjugated systems results in the formation of tetrahedra from four chromophores connected via a central atom. Electronic spectra in solution reveal an electronic interaction between the π-systems. In the solid state, the emission of compounds with a dense packing is nearly identical to the solution spectra, more open structures show significant red shifts. The emission of scaffolds with 1-styrylpyrene chromophores is nearly completely quenched. Most of these tetrahedra are thermally stable up to 420°C. Depending on the diameter of the scaffold, glass transitions occur between 99°C and 169°C.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-01-01 | MRS Proceedings |