The effect of anisotropic interfacial strain on epitaxial growth and optical emission of sodium rare earth fluoride core-shell nanoparticles is investigated. A variety of sodium rare earth fluoride shells are grown on hexagonal phase NaYF 4 :Yb/Er core for providing anisotropic tuning of interfacial strains. Using high-resolution transmission electron microscopy and X-ray diffraction characterizations, the correlations between the epitaxial habits and the interfacial strains are quantitatively addressed. Furthermore, the growth affinity is tuned by controlling precursor concentration in conjunction with Ca 2+ doping, which results in accurate regulation of the anisotropic growth. The lattice strain resulting from mismatched epitaxy is found to enhance luminescence response of the nanoparticles to temperature change.

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A novel protocol for effective rhodium(I)-catalyzed C-H arylation of tertiary phosphines has been devised. It is amenable to a wide range of substrates and gives the products in moderate to high yields. This strategy provides a simple and efficient route to peri-substituted (naphthalen-1-yl)phosphines.