Luminescent properties of three structures built from 3-cyano-4-dicyanomethylene-5-oxo-4,5-dihydro-1H-pyrrol-2-olate and cadmium.
Yellow-orange tetraaquabis(3-cyano-4-dicyanomethylene-5-oxo-4,5-dihydro-1H-pyrrol-2-olato-kappaN(3))cadmium(II) dihydrate, [Cd(C8HN4O2)2(H2O)4] x 2 H2O, (I), and yellow tetraaquabis(3-cyano-4-dicyanomethylene-5-oxo-4,5-dihydro-1H-pyrrol-2-olato-kappaN(3))cadmium(II) 1,4-dioxane solvate, [Cd(C8HN4O2)2(H2O)4] x C4H8O2, (II), contain centrosymmetric mononuclear Cd2+ coordination complex molecules in different conformations. Dark-red poly[[decaaquabis(mu(2)-3-cyano-4-dicyanomethylene-5-oxo-4,5-dihydro-1H-pyrrol-2-olato-kappa(2)N:N')bis(mu(2)-3-cyano-4-dicyanomethylene-1H-pyrrole-2,5-diolato-kappa(2)N:N')tricadmium] hemihydrate], [Cd3(C8HN4O2)2(C8N4O2)2(H2O)10] x 0.5 H2O, (III), has a polymeric two-dimensional structure, the building block of which includes two cadmium cations (one of them located on an inversion centre), and both singly and doubly charged anions. The cathodoluminescence spectra of the crystals are different and cover the wavelength range from UV to red, with emission peaks at 377 and 620 nm for (III), and at 583 and 580 nm for (I) and (II), respectively.
Tafeenko
Viktor A
VA
Chemistry Department, Moscow State University, 119899 Moscow, Russian Federation. viktor@struct.chem.msu.ru
Panin
Gennady N
GN
Baranov
Andrey N
AN
Bardasov
Ivan N
IN
Aslanov
Leonid A
LA