Using heterogeneous basic catalysts has a great importance in chemical reactions because of their advantages (such as easy separation and thermal stability at harsh conditions) over homogeneous catalysts. In this study, magnetic mesoporous silica nanoparticles (mSiO2 ) containing graphitic carbon nitride layers (mSiO2 /g-C3 N4 (x)) were fabricated through a facile process (x signifies the amount of melamine applied during synthesis). Graphitic carbon nitride layers were decorated on mSiO2 by cal...
The first total synthesis of resveratrone and iso-resveratrone based on an epoxide olefination approach is described. The pivotal reaction proceeds by insertion of the lithiated epoxide into a boronic ester and subsequent syn-elimination. Resveratrone has been described to have remarkable photophysical properties, including two-photon absorption. Therefore, an azide derivative has been prepared to allow for use as a biological label.
Last. Jinhao Gao(XMU: Xiamen University)H-Index: 42
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Norepinephrine (NE), acting as both a neurotransmitter and hormone, plays a significant role in regulating the action of the brain and body. Many studies have demonstrated a strong correlation between mental disorders and aberrant NE levels. Therefore, it is of urgent demand to develop in vivo analytical methods of NE for diagnostic assessment and mechanistic investigations of mental diseases. Herein, we report a 19 F MRI probe (NRFP) for sensing and imaging NE, which is constructed by conjugati...
The crystal structure of Be3Ru is described as a ‘coloring’ variant of the hexagonal closest packing of spheres. This “metallic character” goes along with the low number of electrons in the last shell per atom (ELSA). In contrast to the typical intermetallic compounds, the electronic density of states of Be3Ru shows a pseudo-gap in the vicinity of the Fermi level.
Last. Yang Yu(SHU: Shanghai University)H-Index: 19
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Calix[4]resorcinarene-based water-soluble deep cavitands and their applications in molecular recognition, isomers separation, sensing and removal of organic pollutants and reaction vessels are summarized and discussed.
Four mixed-halide cluster salts with chloride-iodide-supported octahedral Nb6 metal atoms cores were prepared and investigated. The cluster anions have the formula [Nb6 Cli12 Ia6 ]n- with Cl occupying the inner ligand sites and I the outer one. They are one- or two-electron-oxidized (n=2 or 3) with respect to the starting material cluster. (Ph4 P)+ and (PPN)+ function as counter cations. The X-ray structures reveal a mixed occupation of the outer sites for only one compound, (PPN)3 [Nb6 Cli12 Ia...
The increasing application of positron emission tomography (PET) in nuclear medicine has stimulated the extensive development of a multitude of novel and versatile techniques to introduce fluorine-18, especially for the radiolabelling of biologically or pharmacologically active molecules. Taking into consideration that the introduction of fluorine-18 (t1/2 =109.8 min) mostly proceeds under harsh conditions, radiolabelling of such molecules represents a challenge and is of enormous interest. Idea...
#1Aldo C Catalán(CINVESTAV-IPN: Center for Research and Advanced Studies of the National Polytechnic Institute)
#2Axel A Loredo(CINVESTAV-IPN: Center for Research and Advanced Studies of the National Polytechnic Institute)
Last. Jorge Tiburcio(CINVESTAV-IPN: Center for Research and Advanced Studies of the National Polytechnic Institute)H-Index: 16
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A pseudo-rotaxane is a host-guest complex composed of a linear molecule encircled by a macrocyclic ring. These complexes can be assembled by sliding the host over the guest terminal groups. If there is a close match between the molecular volume of the flanking groups on the guest and the cavity size of the macrocycle, the slipping might occur slowly or even become completely hindered. We have previously shown that it is possible to overcome the restraints imposed by steric effects on the sliding...
Using first-principles calculations, biaxial tensile (ϵ=2 and 4 %) and compressive (ϵ=-2 and -4 %) straining of Na2 MnSiO4 lattices resulted into radial distance cut offs of 1.65 and 2 Å, respectively, in the first and second nearest neighbors shell from the center. The Si-O and Mn-O bonds with prominent probability density peaks validated structural stability. Wide-band gap of 2.35 (ϵ=0 %) and 2.54 eV (ϵ=-4 %), and narrow bandgap of 2.24 eV (ϵ=+4 %) estimated with stronger coupling of p-d σ bon...
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