نتایج جستجو برای: selective synthesis
تعداد نتایج: 597246 فیلتر نتایج به سال:
The development of porphyrin synthesis is illustrated, using classic and modern-day examples, which attempt to provide insights, including mechanistic ones, into the most used methods for ring-construction selective functionalization.
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
Correction for ‘Chemical and electrochemical synthesis of cobalt hydroxides: selective phase transformation application to distinct electrocatalytic reactions’ by Joon Yong Park et al. , J. Mater. Chem. A 2022, https://doi.org/10.1039/d2ta02166h.
abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...
The synthesis and analytical applications of the new heterocyclic ligand are described. The complexation reaction of the ligand with some cations was studied in aqueous methanol at room temperature using the spectrophotometric method. Results revealed that only the absorption spectra of the Fe (III)–ligand complex show a high redshift of the absorption maximum in the aqueous methanol soluti...
In this work, we report synthesis of silver nanoplates by a simple reduction process of silver nitrate in the presence of polyvinyl alcohol (PVA) and N,N'-dimethyl formamide (DMF). The Characterization of the samples were carried out using X-ray diffraction (XRD), Transmission-electron microscopy (TEM) and UV-vis spectroscopy. Absorption spectra of the nanoplates in comparison with that of the ...
Correction for ‘Stereo-selective synthesis of non-canonical γ-hydroxy-α-amino acids by enzymatic carbon–carbon bond formation’ Rui Zhang et al. , Catal. Sci. Technol. 2021, 11 7380–7385, https://doi.org/10.1039/D1CY00955A.
We report a new strategy for the synthesis of robust hierarchical microand mesoporous MOFs from water stable MOFs via a selective acid etching process. The process is controlled by the size-selective diffusion of acid molecules through the MOF windows. This method enables the fine-tuning of the porosity of hierarchical MOFs, allowing for the generation of well-defined mesopores with high mesopo...
Pyridinium based ionic liquids derived from β-picoline and n-alkylbromides were synthesized by a simple procedure at ambient temperature and then characterized. These neutral ionic liquids were investigated for their dual role as the solvent and promoter for the selective synthesis of a series of N-monomethylanilines using dimethylcarbonate as the methylating agent. A solvent free gree...
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