Hydrothermal Synthesis, Crystal Structures and Fluorescence of a Copper(I) Polymer and a Salt with H 2 SO 4 Based on a Pyrimidine Building Block

Based on the building block of 2-phenyl-4,6-di(pyridin-2-yl)pyrimidine(L = C20H14N4), a Cu(I) polymer [(Cu C20H14N4)(Cu Cl2)]∞ and a salt with H2SO4 [(C20H16N4)(HSO4)2] have been synthesized by hydrothermal method and characterized by X-ray single-crystal diffraction. In the Cu(I) polymer, although the central metal ions of Cu(I) directly coordinate with the building block L, they still do not assembly expected grid-type complexes and there exists a one-dimensional chain constructed through coordinate bonds. In the salt, hydrogen bonds along with two kinds of π···π supramoleuclar interactions fabricate two-dimensional(2D) networks which further generate a 3D supramolecular architecture via interlayer π···π interactions. Fluorescent spectra show that the L emits blue fluorescence and its Cu(I) polymer and salt decrease the fluorescent intensity.