Synthesis, Crystal Structure and Characterizations of a Novel 3D Coordinated Polymer [Gd₂(tzda)₃(H₂O)₅]_n [H₂tzda=(1,3,4‐Thiadiazole‐2,5‐diyldithio)diacetic Acid]

This work was sponsored by the National Natural Science Foundation of China (No. 20471053), the China National Key Basic Research Special Funds (No. 2003CB214500) and the Energy & Technology Program from Zhengzhou University.

A novel 3D coordination polymer [Gd₂(tzda)₃(H₂O)₅] _n (1) has been synthesized by hydrothermal reaction of Gd(NO₃)₃ with a flexible building unit—(1,3,4‐thiadiazole‐2,5‐diyldithio)diacetic acid (H₂tzda). X‐ray single crystal diffraction analysis reveals that 1 belongs to triclinic system, P1¯ space group. The crystallographic data are: a=9.6769(7)Å, b=13.4539(9) Å, c=14.9369 (10)Å, α=65.9050(10)°, β=82.1290(10)°, γ=80.1210(10)°. In the structure, two Gd(III) ions are both nine‐coordinated and in different coordination environments while the tzda^2‐ anions display three different coordination modes to link Gd(III) ions and then form a complicate three‐dimensional network structure.

Keywords:

• flexible carboxylate ligand
• coordination polymer
• crystal structure
• photoluminescent property

Notes

This work was sponsored by the National Natural Science Foundation of China (No. 20471053), the China National Key Basic Research Special Funds (No. 2003CB214500) and the Energy & Technology Program from Zhengzhou University.