title: Ladder-type P,S-bridged trans-stilbenes.
abstract: Phosphole-containing π-systems have emerged as building blocks with enormous potential as electronic materials because of the tunability of the phosphorus center. Among these, asymmetric P-bridged trans-stilbenes are still rare, and here an elegant and efficient synthesis toward such fluorescent molecular frameworks is described. Fine-tuning of the photophysical properties is attempted by enforcing the planarization of the phosphorus tripod and thus increasing the interaction between the phosphorus lone pair and the π-system. The electronic structure of the π-conjugated frameworks is analyzed with NMR, UV-vis and fluorescence spectroscopy, and time-dependent density functional theory (TD-DFT) calculations.
authors.affiliation: Department of Chemistry and Pharmaceutical Sciences, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands.
authors.forename: Wannes
authors.initials: W
authors.lastname: Weymiens
authors.forename: Mark
authors.initials: M
authors.lastname: Zaal
authors.forename: J Chris
authors.initials: JC
authors.lastname: Slootweg
authors.forename: Andreas W
authors.initials: AW
authors.lastname: Ehlers
authors.forename: Koop
authors.initials: K
authors.lastname: Lammertsma