Cyclopalladated complexes as photorefractive materials with high refractive index modulation

A new class of multifunctional molecules for holographic applications is presented: the cyclopalladated complexes BEPON (see Figure) and AZPON rank among the best organic photorefractive materials known due to their excellent photoconductivity and field-induced refractive index modulation. Upon quenching from the melt, BEPON forms an amorphous composite in which the density of active molecules is very high.