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Highly Sensitive Ratiometric Chemosensor for Selective ′Naked‐Eye′ Nanomolar Detection of Co 2+ in Semi‐Aqueous Media
Author(s) -
Patil Smita,
Fegade Umesh,
Sahoo Suban K.,
Singh Amanpreet,
Marek Jaromir,
Singh Narinder,
Bendre Ratnamala,
Kuwar Anil
Publication year - 2014
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201402076
Subject(s) - naked eye , chemistry , detection limit , fluorescence , photochemistry , aqueous solution , metal ions in aqueous solution , aqueous medium , pyridine , visible spectrum , absorption (acoustics) , ion , nuclear chemistry , materials science , organic chemistry , chromatography , physics , optoelectronics , quantum mechanics , composite material
An easy‐to‐prepare chemosensor, (E)‐1‐(phthalazine‐4‐yl)‐2‐(1‐(pyridine‐2‐yl)ethylidene) hydrazine ( 3 ), structurally characterized by single X‐ray crystallography, is developed for the selective and sensitive detection of Co 2+ in aqueous media. Chemosensor 3 shows both absorption and fluorescence responses to Co 2+ by forming a 1:1 complex (among the surveyed metal ions) with a detection limit down to 50 n M . It can also be used as a ′naked‐eye′ sensor due to the outstanding visible and emission color changes from yellow to red and blue to orange, respectively.