233604-21-2Relevant articles and documents
Solvent-dependent fluorescence of donor-substituted (E)-1,2-bis(stilbenyl-1,3,4-oxadiazolyl)ethenes
Detert, Heiner,Sugiono, Erli,Kruse, Gabriele
, p. 638 - 641 (2002)
The Huisgen reaction of aryltetrazoles and fumaryl chloride leads to symmetrically aryl-substituted 1,2-bis(1,3,4-oxadiazolyl)ethenes. Molecules with extended conjugated systems are accessible using stilbenyltetrazoles or higher homologues. The substitution with solubility-permitting alkoxy side-chains results in molecules of C2h symmetry, consisting of a central electron-accepting segment and two terminal electron density-releasing units. The solvatochromism of the absorption spectra is negligible, while in the emission spectra a strong positive solvatochromism connected with a dramatic decrease of the quantum yield is observed, indicating intramolecular charge transfer. The influences of different alkoxy substitution patterns on the luminescence properties are discussed. Copyright
(E)-1,2-bis(5-aryl-1,3,4-oxadiazol-2-yl)ethenes
Detert, Heiner,Schollmeier, Dieter
, p. 999 - 1004 (2007/10/03)
A series of (E)-1,2-bis(1,3,4-oxadiazol-2-yl)ethenes with a variety of aromatic substituents in the 5-positions of the heterocycles was prepared by acylation of the corresponding tetrazoles with fumaryl chloride and subsequent thermal ring transformation. The modified Huisgen reaction renders a new pathway to 3-(1,3,4-oxadiazol-2-yl)propenoic acids and subsequently to the title compounds with different substituents.