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Exclusive Detection of Sub‐Nanomolar Levels of Palladium(II) in Water: An Excellent Probe for Multiple Applications
Author(s) -
Kumari Namita,
Dey Nilanjan,
Kumar Krishan,
Bhattacharya Santanu
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201402635
Subject(s) - palladium , moiety , rhodamine , chemistry , fluorescence , ring (chemistry) , selectivity , combinatorial chemistry , nuclear chemistry , stereochemistry , catalysis , organic chemistry , optics , physics
A new colorimetric probe has been developed for the detection and estimation of Pd II at sub‐nanomolar concentrations. The probe consisted of rhodamine (signaling unit), which was linked with a bis‐picolyl moiety (binding site) through a phenyl ring. Pd II induced opening of the spirolactam ring of the probe with the generation of a prominent pink color. The excellent selectivity of the probe towards Pd II over Pd 0 or Rh II ensured its potential utility for the detection of residual palladium contamination in pharmaceutical drugs and in Pd‐catalyzed reactions. The probe showed a “turn‐on” (bright yellow) fluorescence upon the addition of Pd II , which made it suitable for the detection of Pd contaminants in mammalian cells.