Cyclometallated 1,2,3-triazol-5-ylidene iridium(III) complexes: synthesis,structure, and photoluminescence properties

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Temperature effect on the microstructure and viscoelastic properties of aqueous micellar systems of sodium <Emphasis Type="Italic">N</Emphasis>-methyl-<Emphasis Type="Italic">N</Emphasis>-oleyl taurate

The quantitative characteristics of the temperature effect on the rheological properties of aqueous solutions of the anionic surfactant sodium methyl oleyl taurate (SMOT) are presented. An increase in the intensity of thermal motion of surfactant molecules on heating from 25 to 45 °С was shown to decrease the average contour length of SMOT micelles from 2 μm to 700 nm. The decrease in the length of cylindrical micelles is probably one of the main reasons for a substantial decrease in the viscosity of micellar solutions of the surfactant with temperature.     

Acetylenic derivatives of betulonic acid amide as a new type of compounds possessing spasmolytic activity

Efficient and versatile synthetic procedures towards novel derivatives of betulonic acid via Mannich reaction, Sonogashira cross-coupling, and copper(i)-catalyzed 1,3-dipolar cyclo-additions were developed. Introduction of secondary amines (Mannich reaction) into betulonic acid amides led to derivatives possessing marked spasmolytic activity, which is not characteristic of the triterpene fragment.     

A fast and reliable detection of indigo in historic and prehistoric textile samples

We present a method requiring no sample preparation for the direct identification of indigoid colorants in tiny amounts in ancient historic fabrics using ASAP®‐MS. Exact determinations were completed in less than 1 min. Copyright © 2015 John Wiley & Sons, Ltd.     

Application of polymethyl methacrylate in cathode materials of lithium-ion batteries

A study of the Li₂FeSiO₄/C cathode material doped with Mn demonstrated that introduction of polymethyl methacrylate results in a substantial decrease in the particle size and increase in the specific surface area of the cathode material. Polymethyl methacrylate strongly improves the cyclic stability of the cathode material. The discharge capacity after the first cycle was 218 mA h g^–1, and that upon stabilization of the structure of the cathode material, 170 mA h g^–1.     

Cooperative Lewis Pairs Based on Late Transition Metals: Activation of Small Molecules by Platinum(0) and B(C6F5)3

A Lewis basic platinum(0)–CO complex supported by a diphosphine ligand and B(C₆F₅)₃ act cooperatively, in a manner reminiscent of a frustrated Lewis pair, to activate small molecules such as hydrogen, CO₂, and ethene. This cooperative Lewis pair facilitates the coupling of CO and ethene in a new way.