This review summarizes the progress made essentially in the last fifteen years in the Suzuki–Miyaura coupling reaction by heterogeneous palladium catalysis in water as the sole solvent.
We demonstrate here
a green and efficient biogenic synthesis of copper(II) oxide nanoparticles
using easily available Ocimum Sanctum leaf extract
at room temperature. The biogenic copper oxide nanoparticles have
shown excellent activity on N-arylation of cyclic and acyclic amides
with aryl and styryl halides. Broad substrate scope, excellent functional
group tolerance, and high yields were observed. This protocol is also
extended for the N-arylation of substituted aryl amines and nitrogen
heterocycles including pyrole, indole, imidazole, benzimidazole, and
carbazole. The catalyst was characterized by EPR, UV, FT-IR, BET,
AAS, TGA analysis, XPS, XRD, and HR-TEM.
A tantalum deposited platinum electrode that offers an enhanced catalytic four-electron reduction of oxygen over the bare platinum electrode in acidic solution is explored.
A mutually correlated
green protocol has been devised that originates
from a sustainable production of β-Ni(OH)
2
nanoparticles
which is used for an efficient catalytic synthesis of versatile substituted
tetrazoles, under mild reaction conditions in water via a simple,
one-pot, eco-friendly method. The synthesis is followed by derivatization
into a highly fluorescence active compound 9-(4-(5-(quinolin-2-yl)-1
H
-tetrazol-1-yl)phenyl)-9
H
-carbazole that
can be used at tracer concentrations (0.1 μM) to detect as well
as quantify hydrogen peroxide down to 2 μM concentration. The
nanocatalyst was synthesized by a simple, proficient, and cost-effective
methodology and characterized thoroughly by UV–vis absorption
and Fourier transform infrared spectra, N
2
adsorption/desorption,
high resolution transmission electron microscopy, powder X-ray diffraction
pattern, field emission scanning electron microscopy, and thermogravimetric
analysis. Broad substrate scope, easy handling, higher efficiency,
low cost, and reusability of the catalyst are some of the important
features of this heterogeneous catalytic system. The strong analytical
performance of the resultant derivative in low-level quantification
of potentially hazardous hydrogen peroxide is the key success of the
overall green synthesis procedure reported here.
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