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Perovskite ferroelectrics go metal free
Science, 2018Metal-free perovskites exhibit ferroelectric properties rivaling those of BaTiO 3
Wei, Li, Li-Jun, Ji
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Zeitschrift für Physik D Atoms, Molecules and Clusters, 1989
Simple models and corresponding experimental results are presented concerning single particle and collective motion in metal clusters. Relative abundances, photo-electron spectra, ionization potentials, polarizabilities, and plasma resonances are discussed in relation to the shell model, and suggestions are made for future experiments.
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Simple models and corresponding experimental results are presented concerning single particle and collective motion in metal clusters. Relative abundances, photo-electron spectra, ionization potentials, polarizabilities, and plasma resonances are discussed in relation to the shell model, and suggestions are made for future experiments.
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Metal-Free Trifluoromethylation of Indazoles
The Journal of Organic Chemistry, 2018A simple and efficient tert-butyl hydroperoxide-mediated direct trifluoromethylation of indazoles using sodium trifluoromethanesulfinate has been developed under metal-free conditions. A library of trifluoromethylated products with broad functionalities has been synthesized with moderate to good yields.
Payel Ghosh +2 more
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Science, 2002
CHEMISTRY Molecular analogs of perovskites, which includes important mantle minerals and high-temperature superconductors, have been synthesized. Bremner et al . crystallized cubic and 2-H hexagonal variants of a perovskite in which (NH4)Cl6 octahedra form the building blocks of a corner ...
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CHEMISTRY Molecular analogs of perovskites, which includes important mantle minerals and high-temperature superconductors, have been synthesized. Bremner et al . crystallized cubic and 2-H hexagonal variants of a perovskite in which (NH4)Cl6 octahedra form the building blocks of a corner ...
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Metal‐Free Aryltrifluoromethylation of Activated Alkenes
Angewandte Chemie International Edition, 2013Metal-free: The first metal-free aryltrifluoromethylation of activated alkenes has been developed. With this method, trifluoromethylated isoquinolinediones, spirobicycles, oxindoles, and α-aryl-β-trifluoromethylamides were obtained with high control of the regioselectivity.
Kong, Wangqing +4 more
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Metal-Free Highly Luminescent Silica Nanoparticles
Langmuir, 2012Stable, cost-effective, brightly luminescent, and metal-free organosilica nanoparticles (NPs) were prepared using the Stöber method without any thermal treatment above 318 K. The white-light photoluminescence results from a convolution of the emission originated in the NH(2) groups of the organosilane and oxygen defects in the silica network.
Brites, Carlos +5 more
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Chemical & Engineering News Archive, 2012
In a chemical first, an international research team has developed a metal-free reaction that hydrogenates aromatic rings to form cyclohexyl derivatives. The achievement could spark a broader range of applications for industrial hydrogenations, which are widely used for processing petroleum and foods.
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In a chemical first, an international research team has developed a metal-free reaction that hydrogenates aromatic rings to form cyclohexyl derivatives. The achievement could spark a broader range of applications for industrial hydrogenations, which are widely used for processing petroleum and foods.
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Acta Crystallographica Section C Crystal Structure Communications, 1999
The molecule of the title compound, C 32 H 18 N 8 , is slightly distorted at the corners. Two of the phenyl rings are located below the molecular plane while the other two are above the plane. This leads to a molecular symmetry of C i as opposed to D 2h , assumed for the free molecule.
S. Matsumoto, K. Matsuhama, J. Mizuguchi
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The molecule of the title compound, C 32 H 18 N 8 , is slightly distorted at the corners. Two of the phenyl rings are located below the molecular plane while the other two are above the plane. This leads to a molecular symmetry of C i as opposed to D 2h , assumed for the free molecule.
S. Matsumoto, K. Matsuhama, J. Mizuguchi
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SAE Technical Paper Series, 2010
<div class="section abstract"><div class="htmlview paragraph"> We herewith would like to consider the reasons which led to research and development of automotive leather which could be not only chrome-free but also Metal-free <sup> <span class="xref">1</span> </sup> and aldehyde-free.
Gianluca Sartori +4 more
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<div class="section abstract"><div class="htmlview paragraph"> We herewith would like to consider the reasons which led to research and development of automotive leather which could be not only chrome-free but also Metal-free <sup> <span class="xref">1</span> </sup> and aldehyde-free.
Gianluca Sartori +4 more
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