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Mostrando ítems 2101-2110 de 3106
Ionic conductivity enhancement in Ti-doped Sr11Mo4O23 defective double perovskites
(Royal Society of Chemistry, 2017-03)
A substantially higher ionic motion can be achieved by partially replacing Mo(VI) by Ti(IV) cations in the novel Sr11Mo4−xTixO23−δ (with x = 0.0, 0.5 and 1.0) electrolyte oxides, successfully enhancing the oxygen vacancy ...
First total synthesis of the only known 2-isopropyliden-2: H -benzofuran-3-one isolated from V. luetzelburgii
(Royal Society of Chemistry, 2017-01)
The first total synthesis of 5-(1-hydroxy-1-ethyl)-2-isopropyliden-2H-benzofuran-3-one, is reported in its racemic and in one of its optically active [(S)-(-)] forms. This heterocycle, isolated from Verbesina luetzelburgii, ...
Synthesis, characterization and chemical degradation of poly(ester-triazole)s derived from d-galactose
(Royal Society of Chemistry, 2019-03)
a-Azide-u-alkynyl ester monomers were designed and synthesized in order to obtain hydrolytically degradable polymers. The monomers were prepared from D-galactose, as a renewable resource. Environmentally benign azido–alkyne ...
Chitin based hybrid composites reinforced with graphene derivatives: a nanoscale study
(Royal Society of Chemistry, 2015-07)
In this work, we present two novel nanostructured hybrid materials based on a chitin matrix loaded with increasing amounts of graphene oxide and reduced graphene oxide nanosheets (nGO and rGO, respectively). Both kinds of ...
High-throughput modified QuEChERS method for the determination of the mycotoxin tenuazonic acid in wine grapes
(Royal Society of Chemistry, 2016-10)
A reliable, simple, fast, inexpensive and robust sample preparation approach for tenuazonic acid (TA) determination in grapes by liquid chromatography with ultraviolet detection (HPLC-UV) is proposed. The method is based ...
Experimental and theoretical studies on polar Diels–Alder reactions of 1-nitronaphathalene developed in ionic liquids
(Royal Society of Chemistry, 2013)
The reactions between 1-nitronaphthalene 1 and two nucleophilic dienes, Danishefsky´s diene 2 and 1-trimethylsilyloxy-1,3-butadiene 3, to yield phenanthrenols 7 and 8 developed in protic and aprotic ionic liquids (ILs) ...
Chitin hybrid materials reinforced with graphene oxide nanosheets: Chemical and mechanical characterisation
(Royal Society of Chemistry, 2014-02)
Chitin hybrid materials reinforced with graphene oxide nanosheets (nGO) have been prepared. The chitin : nGO ratio ranged from proportions where chitin was the main component to ones where nGO exceeded chitin. SEM and TEM ...
Biocompatibility and photo-induced antibacterial activity of lignin-stabilized noble metal nanoparticles
(Royal Society of Chemistry, 2018-12)
One-pot thermal and photochemical syntheses of lignin-doped silver and gold nanoparticles were developed and their antimicrobial properties were studied against Escherichia coli and Staphylococcus aureus. The nature of the ...
Structural modifications induced by an in vitro maturation process in zona pellucida glycoproteins of bovine oocytes. A Raman microspectroscopy analysis
(Royal Society of Chemistry, 2016-08)
Oocyte quality is a determinant factor in the efficiency of an in vitro production process. Since the first oocyte–sperm interactions take place in the zona pellucida, the evaluation and characterization of this egg external ...
Gas-phase synthesis of 3-carboethoxy-quinolin-4-ones. A comprehensive computational mechanistic study to uncover the dark side of the Gould–Jacobs reaction
(Royal Society of Chemistry, 2016-08)
A set of 3-carboethoxy-quinolin-4-ones has been synthesized from diethyl 2-((arylamino)methylene) malonates through a Gould-Jacobs (G-J) cyclization using the flash vacuum pyrolysis (FVP) method. Mechanistic studies including ...