| Abstract: A new ligand, 7-oxa-dibenzofluorene-3,11-disulfonic acid (H2L), was synthesized by sulfonation and ring closure of 2,2′-dihydroxyl-1,1′-binaphthalene with concentrated sulfuric acid. Its two complexes, [CdL(bipy)2(H2O)][Cd(bipy)2(H2O)2]·L·H2O (1) (bipy=2,2(-bipyridyl) and [CdL(phen)2(H2O)]·5H2O (2) (phen=1,10-phenanthroline), were obtained by a hydrothermal route, and structurally characterized by X-ray single-crystal diffraction. Compound 1 crystallized in space group P1 with cell parameters a=1.205 5(6), b=1.576 4(8), c=1.954 5(10) nm, α=75.755(9), β=88.093(10), and γ=89.035(10)°. In 1, there are two independent Cd(Ⅱ) ions in the asymmetric unit, in which one Cd(1) ion is coordinated with four nitrogen atoms from two bipy molecules, one oxygen atom of L2- anion, and one water molecule; the Cd(2) ion is coordinated with four bipyridyl nitrogen atoms and two water molecule. Compound 2 crystallized in space group P21/c with cell parameters a=2.104 0(7), b=1.358 0(4), c=1.428 9(5) nm, and β=94.543(6)°. In 2, the coordination environment of Cd(Ⅱ) ion is similar to that of Cd(1) ion in 1, producing a mononuclear unit. Both compounds exhibit strong blue photoluminescence in the solid state at room temperature. CCDC: 1, 258028; 2, 258029. |
