The crystal structure of a mononuclear Pr complex with cucurbit[6]uril.

A new mononuclear complex, penta-aqua-(cucurbit[6]uril-κ ,')(nitrato-κ ,')praseodymium(III) dinitrate 9.56-hydrate, [Pr(NO)(CB6)(HO)](NO)·9.56HO (), was obtained as outcome of the hydro-thermal reaction between the macrocyclic ligand cucurbit[6]uril (, CHNO) with a tenfold excess of Pr(NO)·6HO.

Crystal growth, layered structure and luminescence properties of KEu(PO)(WO).

KEu(PO)(WO) has been prepared the high-temperature solution growth (HTSG) method using KWO-KPO molten salts as a self-flux and characterized by single-crystal X-ray diffraction analysis, IR and luminescence spectroscopy. The structure of this new compound features a 2D framework containing [EuPO] layers, which are composed of zigzag chains of [EuO] interlinked by slightly distorted PO tetrahedra. Isolated WO tetrahedra are attached above and below these layers, leaving space for the K counter-cations.