No abstract

We report the synthesis of 2 nm copper nanocrystals (Cu NCs) via a microwave-assisted polyol method without using additional protective and reducing agents. The Cu NCs are oxidation resistant and exhibit photoluminescence and highly stable properties in a colloidal dispersion.

Surfactant-free, single-nano-sized copper nanoparticles (Cu NPs) (size: about 2 nm) were prepared by the DMF reduction method. The Cu NPs showed high catalytic activity (with a turnover number (TON) of up to 2.2 × 10(4)) in Ullmann-type cross-coupling of aryl halides with phenols under ligand-free conditions.

Here we report on a nanoscale circular dichroism (CD) imaging for a two-dimensional chiral pair of nanostructures to elucidate the relationship between nanoscale chirality and CD activity. The chiral pair exhibited local ellipticity as high as 42 degrees in the CD signal at the center, with signals of both handedness coexisting in one nanostructure.