Abstract
AbstractNon‐linear optical and electrical properties of polymer films obtained by dipole orientation of active units are reported. Novel polar oligomer with N‐(indan‐1,3‐dion‐2‐yl)pyridinium betaine (IPB) as a side group is studied. Orientation of polar groups in oligomer thin films causes an increase of the photo‐induced change of surface potential on irradiation in the region of photo‐induced electron transfer (PIET) where the IPB group exhibits a reversible change of the value and sign of the dipole moment. At longer wavelengths, the value of the surface potential of the oligomer may be determined by transport of photo‐generated charge carriers. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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