Author/Authors :
Dhara، نويسنده , , Anamika and Jana، نويسنده , , Atanu and Konar، نويسنده , , Saugata and Ghatak، نويسنده , , Sumanta Kumar and Ray، نويسنده , , Sangita and Das، نويسنده , , Kinsuk and Bandyopadhyay، نويسنده , , Anasuya and Guchhait، نويسنده , , Nikhil and Kar، نويسنده , , Susanta K.، نويسنده ,
Abstract :
A novel rhodamine-based chemosensor, 3′,6′-bis(diethylamino)-2-((2,7-dimethoxy-9H-fluoren-9-ylidene)amino)spiro[isoindoline-1,9′-xanthen]-3-one (1) for aluminum ion, was designed and synthesized. Compound 1 is an orange colored, weak fluorescent compound which was synthesized via one-step facile reaction of rhodamine B hydrazide with 2,7-dimethoxy-9H-fluoren-9-one in MeOH. When Al3+ salt was added in methanol:water (30:70, v/v) solution then spirolactum ring of 1 was opened. The absorbance and fluorescence of the mixed solution were increased dramatically because of the opening of the lactum ring. Thus, signal transduction occurred via reversible CHEF (chelation-enhanced fluorescence) mechanism in the range 580–584 nm.
