Perylene Diimide Appended with 8-Hydroxyquinoline for Ratiometric Detection of Cu2+ Ions and Metal Displacement Driven "Turn on" Cyanide Sensing

作者：Singh Prabhpreet^*; Mittal Lalit Singh; Kumar Sandeep; Bhargava Gaurav; Kumar Subodh

来源：Journal of Fluorescence, 2014, 24(3): 909-915.

DOI：10.1007/s10895-014-1371-6

• Perylene diimide
• Dyes
• Ratiometric
• Fluorescent sensor
• Copper ions
• Cyanide

Perylene diimide (PDI) 3 and 4 appended with 8-hydroxyquinoline derivatives have been synthesized and their photophysical and spectroscopic properties have been experimentally determined. Moreover, PDIs 3 and 4 show ratiometric behavior to detect Cu2+ colorimetrically with visible color change from coral red to light pink, whereas 3 and 4 show "turn-off" behavior in fluorescence with lowest limit of detection 5 x 10(-7) M. The PDI 3 could be further utilized for ratiometric CN- detection colorimetrically and as "turn-on" sensor for CN- detection fluorometrically with lowest limit of detection 8 x 10(-6) M. The comparison of spectroscopic properties of PDI 1-4 highlights the importance of linking 8-hydroxyquinoline units on the PDI core at bay position for achieving Cu2+ recognition event into ratiometric signal.

• 出版日期2014-5