Fur-imine-functionalized
graphene oxide-immobilized copper oxide
nanoparticles (Cu(II)-Fur-APTES/GO) are synthesized and found to be
a cost-effective, efficient, and reusable heterogeneous nanocatalyst
for the preparation of pharmaceutically important xanthene derivatives
under greener solvent conditions. Cu(II)-Fur-APTES/GO exhibits excellent
result in the synthesis of xanthenes with reduced reaction time (25−50
min) and higher yields (up to 95%) and has a simple procedure, ease
of product separation, and no byproducts. Moreover, the nanocatalyst
has a Cu loading of 13.5 at. % over functionalized GO which is far
superior than the already known metal-based heterogeneous catalysts.
The newly synthesized catalyst has been characterized by various physiochemical
techniques such as X-ray photoelectron spectroscopy, X-ray diffraction,
energy-dispersive X-ray, Raman spectroscopy for structural characterization,
field emission scanning electron microscopy and high-resolution transmission
electron microscopy for morphological characterization. The catalyst
showed admirable recyclability up to five consecutive runs, and there
was no appreciable loss in catalytic efficiency.
A DNA based biosensor is reported with very high specificity to Mycobacterium tuberculosis and a detection limit much superior to those already reported in the literature.
A novel binuclear squire planar complex of nalidixic acid with Ag(I) metal ion with the formula [Ag(Nal)2] has been synthesized. The synthesized metal complex was characterized using CHN analysis, Fourier-transformed infra-red (FT-IR), thermo gravimetric analysis (TGA), differential scanning calorimetry (DSC), ultra violet-visible (Uv-vis) and single-crystal X-ray diffraction (XRD). The newly synthesized complex shows more advanced antifungal activity compared to the parent quinolone against four fungi, namely Pythium aphanidermatum, Sclerotinia rolfsii, Rhizoctonia solani and Rhizoctonia bataticola.
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