art though the utilization of photopolymerizable vehicles is believed to be the best use of the invention the photopolymerizable medium donor molecules and acceptor molecules comprise the photopolymerizable vehicle of the present invention since clarity of the vehicle is desired for suppressing undesirable screening of wavelengths of energy transmitted therethrough traditional fillers colorants and the like should be avoided it should be recognized however that colloidal silica or like particles preferably transparent and of suitable concentration may find utility in reinforcing the polymerized vehicle providing that the requisite transparency and transmissivity of the vehicle is maintained the following examples show how the present invention can be practiced but should not be construed as limiting in this application all percentages and proportions are by weight and all units are in the metric system unless otherwise expressly indicated also all citations are expressly incorporated herein by reference the chemicals used included 9 10 dibromoanthracene dba 2 napthalene sulfonyl chloride nsc and 99 percent methyl methacrylate mma the napthalene sulfonyl chloride was recrystallized from chloroform and the inhibitor 66 ppm methoxy hydroquinone was removed from the methyl methacrylate by base extraction the 9 10 dibromoanthracene was used as received from aldrich chemical company where all chemicals were acquired photochemical irradiations were carried out with filtered and non filtered eimac 150 watt high pressure xenon arc lamp light sources polymer formation was determined gravimetrically via methanol precipitation of irradiated monomer polymer solutions filters utilized were obtained from the corning glass company the vehicle comprised mma 10 g dba 0 02 g and nsc 0 2 g aliquots of the sensitized photopolymerizable vehicle were subjected to unfiltered as well as a variety of filtered variations as set forth in table 2.