2-(5-AMINO-3,4-DICYANO-2H-PYRROL-2-YLIDENE)-1 ,1,2-TRICYANOETHANIDE IMMOBILIZED ON ANION EXCHANGERS AS OPTICAL TRANSDUCER FOR THE DETECTION OF Hg(Ⅱ) IN WATER

摘要

The dye 2-(5-amino-3,4-dicyano-2H-pyrrol-2-ylidene)-1,1,2-tricyanoethanide (L') was fixed on different supports by means of anionic exchange. Controlled pore glasses, cross-linked styrene and cellulose paper were used as supports. Photodegradation and leakage of the dye were thoroughly investigated by means of an accurate spectrophotometric analysis in the presence of mercury acetate [Hg(AcO)_2] solutions. In order to reduce the photodegradation of the dye, an optoelectronic unit was developed using light-emitting diodes as sources and a suitable electronic circuit as the detecting system.