acid fig9 reports the calibration lines table 4 reports the obtained quantum yield values the fluorescence spectrum shows an emission maximum at around 530 nm thus it can be stated that such molecule is a good candidate for making devices which emit in the green range the calculated quantum yield of such material is 0 535 in fig1 the graph is reported showing the dasde line in comparison with that of the standards which we have used table 5 shows the calculated quantum yields table 5 shows that the quantum yield of dasde which we synthesised is comparable to that of quinine sulphate this indicates a high emission efficiency for such substance the data shown above have indicated a quantum emission efficiency equal to 0 535 for the monomer dasde being comparable to the quantum yield of the quinine sulphate 0 546 such monomer was found to be particularly soluble in most organic solvents and miscible in amorphous polymers of different nature in fact blends were made by using 0 3 by weight of dasde in polymer matrices such as and polyvinylpyridine pvpy and polyvinylcarbazole pvk the films obtained from these blends resulted unaltered after a period of over six.