A fluorescent Cu(II) complex as a dual functional sensor for selective and sensitive detection of acetone and Cd(II) pollutants
, Mohd. Muddassir, * Abdullah Alarifi, Mohd Afzal, Khulud Abdullah Alshali, Naaser A. Y. Abduh and Abeer Beagan . 2020
In this study, Cu2+ perchlorate complexes of 3,5-dimetylpyrazole(dmpy), namely
[Cu(dmpy)3(H2O)2](H2O)(ClO4)2 (1), were prepared and characterized by X-ray diffraction (XRD),
thermogravimetric analysis (TGA), infrared (IR) spectroscopy, elemental analysis, mass spectrometry, and
ultraviolet visible (UV-Vis) spectroscopy. It was determined that Cu2+ coordinated to the nitrogen atoms
of three dmpy molecules as well as to the oxygen atoms of two H2O molecules in a square pyramidal
geometry. To balance the charge, two uncoordinated perchlorate anions and one H2O molecule were
also present in the lattice. The resulting Cu2+ complex was involved in extensive hydrogen bonding,
which stabilized the structure. The fluorescence properties of complex 1 were studied in acetonitrile at
room temperature upon the addition of different organic solvents. It was confirmed that the complex
exhibited remarkable acetone selectivity via a fluorescence quenching mechanism. At low
concentrations, the fluorescence intensities were nearly completely quenched via a turn-off mode.
Moreover, complex 1 displayed exceptional selectivity, fast detection time, and high sensitivity for Cd2+
in aqueous solutions via a fluorescence enhancement mechanism (turn-on mode). Hence, the prepared
complex showed potential for application in Cd2+ detection. Notably, in an aqueous solution, complex 1
exhibited highly selective fluorescence enhancement effects (turn-on mode) with respect to Cd2+ and
was not affected by the interference of other metal ions
In this work, new nanoadsorbents consisting of polymer-modified multi-walled car- bon nanotubes (MWCNTs) were used to remove toxic ionic dyes, of methylene blue (MB) and methyl orange (MO),…
In this study, borate glass doped with constant cobalt chloride (CoCl2) content and different ratios of TiO2/B2O3 were…
In this work, a glass system of La2O3, NiO, and Na2O borate glass was prepared by changing the concentrations
of La2O3/B2O3 contents. Further, the internal structure, optical absorbance,…