Syntheses, crystal structure, and fluorescent properties of a lanthanide complex

A new complex [Dy2(Pht)2(HPht)2(Phen)2(H2O)4] (I), where Pht2− = dianion of o-phthalic acid; HPht− = mono-anion of o-phthalic acid; Phen = 1,10-phenanthroline, has been synthesized and the crystal structure was determined by X-ray crystallography. The I crystallizes in the triclinic system, space group \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$P\bar 1$\end{document} with lattice parameters a =10.1126(3) Å, b =10.7029(3) Å, c = 11.9360(3) Å, α = 90.2260(10)°, β = 99.5340(10)°, γ = 100.9810(10)°, V = 1249.87(6) Å3, Z = 2, ρcalcd = 1.881 mg m−3. The photophysical property of I has been studied with excitation and emission spectra.