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A tetranuclear erbium complex with pyridine-2,4,6-tricarboxylic acid(H3ptc), [Er4(ptc)4(H2O)18]·6H2O(1), has been synthesized by hydrothermal method. The complex crystallizes in triclinic system, space group P1, with a = 7.620(2), b = 10.459(3), c = 17.418(5) ?, α = 92.351(5), β = 92.080(5), γ = 95.627(4)°, V = 1379.1(7) ?3 and Z = 2. One Er(III) cation is eight-coordinated and the other is nine-coordinated. The complex exhibits characteristic luminescence of erbium cation in near-infrared region upon the excitation of UV-rays. Furthermore, a three-dimensional supramolecular complex was formed by weak hydrogen bonds among the tetranuclear units.
A tetranuclear erbium complex with pyridine-2,4,6-tricarboxylic acid (H3ptc), [Er4 (ptc) 4 (H2O) 18] 6H2O (1), has been synthesized by hydrothermal method. The complex crystallizes in triclinic system, space group P1 with a = 7.620 (2), b = 10.459 (3), c = 17.418 (5) ?,? = 92.351 (5),? = 92.080 (5),? = 95.627 = 1379.1 (7)? 3 and Z = 2. One Er (III) cation is eight-coordinated and the other is nine-coordinated. The complex showing characteristic luminescence of erbium cation in near-infrared region upon the excitation of UV-rays Furthermore, a three-dimensional supramolecular complex was formed by weak hydrogen bonds among the tetranuclear units.