Structural and Luminescence Behavior of Nanocrystalline Orthophosphate KY(PO): Eu ( = Ca, Sr) Synthesized by Hydrothermal Method.

KY(PO):5% Eu phosphates have been synthesized by a novel hydrothermal method. Spectroscopic, structural, and morphological properties of the obtained samples were investigated by X-ray, TEM, Raman, infrared, absorption, and luminescence studies. The microscopic analysis of the obtained samples showed that the mean diameter of synthesized crystals was about 15 nm.

Crystal structure, vibrational and optic properties of 2-N-methylamino-3-methylpyridine N-oxide - Its X-ray and spectroscopic studies as well as DFT quantum chemical calculations.

The crystal and molecular structure and physicochemical properties of 2--methylamino-3-methylpyridine -oxide (MA3MPO) have been studied. MA3MPO was synthesized from 2-amino-3-methylpyridine by several steps to form colorless crystals suitable for crystallographic analysis. The data reveal that MA3MPO crystallizes in the monoclinic space group 2/.

Phase transition in the extreme: a cubic-to-triclinic symmetry change in dielectrically switchable cyanide perovskites.

Two novel three-dimensional metal-organic compounds of formula FAKM(CN), where M = Co, Fe and FA = formamidinium (CH(NH)), have been found to crystallize in a perovskite-like architecture. They have been investigated by X-ray diffraction, dielectric and spectroscopic methods as a function of temperature in order to determine the interactions in the crystals and the mechanism of phase transitions occurring at ca. 321 K upon heating.

Structural, phonon, magnetic and optical properties of novel perovskite-like frameworks of TriBuMe[M(dca)] (TriBuMe = tributylmethylammonium; dca = dicyanamide; M = Mn, Fe, Co, Ni).

We report the synthesis, crystal structures, thermal, optical and phonon properties of four new metal dicyanamide frameworks templated using tributylmethylammonium cations (TriBuMe). Our results show that these compounds crystallize in a three-dimensional perovskite-like monoclinic structure, space group P2/n, with two inequivalent TriBuMe, one well-ordered and the second one showing distinct disorder. DSC and X-ray diffraction show that TriBuMeMn undergoes an order-disorder structural phase transition near 380 K associated with an increase in the symmetry to the orthorhombic Pnma.

Spectroscopic investigation and DFT modelling studies of Eu complex with 1-(2,6-dihydroxyphenyl)ethanone.

Eu complex with 1-(2,6-dihydroxyphenyl)ethanone in the solid state has been synthesized and characterized by elemental analysis, UV-visible, FT-IR and FT-Raman spectroscopies, powder X-ray diffraction, electron emission under femtosecond laser excitation. The stoichiometry and the formula of the studied complex have been proposed. Its physicochemical properties have been analyzed in terms of the structure and DFT calculations performed for the ligand.