| abstract |
3,4-Polyalkylenedioxythiophene dispersions comprising polyanions and cationic 3,4-polyalkylenedioxythiophenes, in particular those of the formula (I) n nin whichn n is an integer from 3 to 100, preferably from 4 to 15, and X is —(CH 2 ) x —CR 1 R 2 —(CH 2 ) y —, where R 1 and R 2 , independently of one another, are H, an optionally substituted alkyl radical having from 1 to 20 carbon atoms, an aryl radical having from 6 to 14 carbon atoms or —CH 2 —OR 3 , where R 3 =H, alkyl or —CH 2 —CH 2 —CH 2 —SO 3 H, and x and y are each, independently of one another, an integer from 0 to 9, in which at least 90% of the particles are <50 nm, can be employed in electroluminescent arrangements having a long service life and high luminosity. |