705282-16-2Relevant articles and documents
Synthesis and electrochromic properties of conducting polymers based on highly planar 2,7-disubstituted xanthene derivatives
Olech, Kamila,Gutkowski, Ramona,Kuznetsov, Volodymyr,Roszak, Szczepan,So?oducho, Jadwiga,Schuhmann, Wolfgang
, p. 679 - 687 (2015)
On the basis of preliminary DFT calculations, p-type semiconducting polymers based on 2,7-substituted xanthene building blocks that show a high degree of planarity were designed. The synthesis, electrochemical characterization, and theoretical modeling of 2,7-bis(thiophen-2-yl)-9,9-dimethylxanthene (1) and 2,7-bis(3-hexylthiophen-2-yl)-9,9-dimethylxanthene (2) is described. The synthetic procedure is based on the incorporation of thiophene rings by means of Pd-catalyzed cross-coupling reactions, which lead to monomers 1 and 2. Copolymers P1 and P2 obtained by means of anodic polymerization have been characterized by spectroscopic and electrochemical methods. Electrochromism was observed for both polymers. The experimental data supported by density functional theory modeling explain the influence of alkyl chain substitution on the properties of the investigated copolymers.
Towards the synthesis of perfluoroalkylated derivatives of Xantphos
Adams, Dave J.,Cole-Hamilton, David J.,Harding, Duncan A.J.,Hope, Eric G.,Pogorzelec, Peter,Stuart, Alison M.
, p. 4079 - 4085 (2007/10/03)
An analogue of Xantphos incorporating four perfluoroalkyl groups has been prepared and successfully used as a ligand in the rhodium-catalysed hydroformylation of 1-octene in toluene. A number of perfluoroalkylated xanthene backbones have also been synthesised, but their conversion into preferentially perfluorocarbon solvent soluble Xantphos-type ligands, suitable for catalysis in fluorocarbon solvents, has not been successful.
