Pattern Doping into Non-Substituted Poly(p-phenylene vinylene) by a Simple Vacuum Process for a Multicolored Luminescence Medium

Functional dyes could be dispersed into non-substituted poly(p-phenylene vinylene) (PPV), which shows a poor processability due to its insoluble and infusible, by the vacuum process under the thermal equilibrium state without the structural damage of PPV. Using this methods, it was possible to change the color of PPV from yellow to green with the blue dye, 1,4-(N,N'-diethylamino)anthraquinone (SV59). The amount of SV59 doped into PPV increased with temperature and treatment time. The fluorescence color of PPV could be changed from green to red by 2 min doping of 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM). Furthermore, a pattern doping with DCM could be carried out resulting in production of multicolored luminescent medium.