Abstract

In this article, a new benzoimidazole based Zn2 + fluorescence sensor DABI has been prepared. The sensor displays a rapid and a linear response to Zn2 + with a red-shifted 100-fold turn-on signal from the dark background. The presence of other metal ions especially Cd2 + does not interfere with its Zn2 + response. Molecular modeling study suggests that the Zn2 +-induced red shift of emission and fluorescence turn-on of DABI could be correlated to the coplanation of two aryl planes of 2-aryl substituted benzoimidazole.

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