Abstract
A three-dimensional 3d-4f heterometallic coordination polymer, {[Er2Zn(Hpdc)4(H2O)8]·2H2O}n (1)(H3pdc=3,5-pyrazoledicarboxylic acid), was hydrothermally synthesized and characterized by techniques of single crystal X-ray diffraction, infrared spectra (IR), thermogravimetric analysis(TGA), elemental analysis, powder X-ray diffraction(PXRD), and luminescent measurements. X-ray crystal structure analyses reveal that complex 1 shows a 3D heterometallic framework with nested sandwich-type structure, built by the 2D Er-Hpdc networks, [Zn(Hpdc)2(H2O)2] units, and hydrogen bonds. In addition, the solid-state luminescent property investigation shows that emission lifetime span of the complex was at the microsecond level in the visible region, which is classified as a phosphorescent material. Moreover, when excited at 375nm, the complex exhibits the characteristic emission 4I13/2→4I15/2 of Er(III) at 1514nm.
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