A new framework structure polynuclear complex of europium nitrate with 1,4-bis(phenylsulfinyl)butane

A polynuclear europium(III) complex of the formula [Eu(bphsb)1.5(NO3)3]n[bphsb = 1.4-bis(phenylsulfinyl)butane]1734 141 has been prepared and its structure and luminescent properties have been determined by X-ray diffraction and spectral measurements. The structure consists of EuIII ions bridged by bidentate bphsb ligands and coordinated by NO3− groups to make a polynuclear neutral complex. The europium ion is nine-coordinated and the geometry around the EuIII is that of a distorted tricapped trigonal prism. The polynuclear complex has a framework structure with 54-membered macrocyclic rings, each containing six europium ions. The complex exhibits sensitized luminescence that originates from 5D0 state to 7FJ Stark levels.