Abstract
A naphthalenediimide (NDI)-based highly potential chemosensor for the detection of cyanide has been synthesized successfully in several steps. The NDI-based probe displayed high selectivity and sensitivity towards cyanide ions in fluorescence 'turn-off' mode over other ions used in this study. The naked-eye, UV-vis absorbance and fluorescence methods are employed to investigate the sensing performance of probe 1 toward CN- ion detection. The limit of detection for CN- ions was calculated to be 4.11 × 10-7 M. Moreover, the Stern-Volmer quenching constant and fluorescence quenching efficiency of CN- ions were estimated to be 1.1 × 105 M and 88.81%, respectively. Job's plot showed a 1 : 1 stoichiometric complexation reaction between probe 1 and CN- ions. For practical applications, probe 1 was efficiently applied for the detection of CN- ions using a paper strip method.
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