Atom‐efficient direct N‐alkylation: An environmentally clean one‐pot selective N‐alkylation of amines with an equimolar amount of alcohols via a hydrogen autotransfer pathway was achieved over a titania‐supported gold catalyst system in good to excellent yields without additive (see scheme).

A highly chemo-and regioselective reduction of a wide diversity of aromatic nitro compounds to the corresponding amines has been achieved by a combination of gold nanoparticles supported on titania and ammonium formate (HCOONH 4 ) in ethanol at room temperature. Furthermore, a direct and mild route to formanilides from aromatic nitro compounds bearing different functional groups by reductive N-formylation using the gold-mediated transfer reduction protocol is also established.

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Quantum dots (QDs) exhibit not only wide tunability of luminescence but also complex optical properties because of the large degree of freedom in their structure and chemical composition. Quaternary ZnAgInSe QDs with different Zn/Ag ratios were synthesized and examined as temperature sensors. The relationship among the luminescence energy, emission intensity, and full-width at half-maximum (FWHM) of the emission band at different temperatures was investigated. To understand the photoluminescence mechanism, time-resolved photoluminescence spectra were recorded. Moreover, the dependence of the luminescence peak energy and FWHM on temperature was investigated, and a small deviation from the actual temperature was observed, indicative of the use of ZnAgInSe QDs as high sensitivity temperature sensors.

Chemoselective reduction of alpha,beta-unsaturated aldehydes in the presence of CO and H(2)O proceeds effectively over a ceria-supported gold catalyst system, providing a novel, efficient and clean approach to produce useful primary allyl alcohols with excellent activity and selectivity.