Synthesis of new red-emitting single-phase europium oxycarbonate.

A fascinating one-pot solvent-, catalyst-, and template-free synthesis process to facilitate a single-phase crystalline hexagonal type-II luminescent Eu(2)O(2)CO(3) organization comprised of nanoplates is demonstrated. The thermolysis (700 degrees C) of europium acetate in a closed stainless steel reactor under autogenic pressure [approximately 3 MPa] yielded Eu(2)O(2)CO(3) superstructures. Powder X-ray diffraction, high-resolution transmission electron microscopy, and Raman measurements confirmed the structure. Fourier transform infrared spectroscopy, energy-dispersive spectrometry, and CHNS analysis verified the composition. Scanning electron microscopy corroborated the morphology of the new Eu(2)O(2)CO(3) compound, and the primary luminescence properties are accounted.

Superconducting nanocrystalline tin protected by carbon.

Nanosized pure Sn crystals protected by in situ formed carbon synthesized by the thermolysis of allyltriphenyltin in an inert atmosphere under its autogenic pressure in closed reactor showed superconductivity at 3.7 K.