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Relevant academic research and scientific papers

Perylene diimide based 'turn-on' fluorescence sensor for detection of Pd2+ in mixed aqueous media

A perylene diimide (PDI) based fluorescence chemosensor (PDI-1) for Pd 2+ was prepared. PDI-1 showed a remarkable fluorescence enhancement (over 120-fold) in the presence of Pd2+ in mixed aqueous media with high selectivity and sensitivity. Moreover, the dramatically 'off-on' fluorescence response concomitantly induced the obvious color change from dark purple to brilliant pink, which could also be identified by naked eyes easily. The low limit for Pd2+ detection was found to be as small as 10 -9 mol/L. Hence, PDI-1 is a highly promising fluorescent chemosensor for the direct determination of residual Pd2+ in chemical medicines and environment samples.