A new zinc complex based on 5-bromoisophthalic acid and 1,2-bis(imidazole-1-yl)ethane: Hydrothermal synthesis, crystal structure, and properties

ABSTRACT

A new complex, [Zn(5-Br-ip)(1,2-Bie)]_n (1), (5-Br-ipH₂ = 5-bromoisophthalic acid; 1,2-Bie = 1,2-bis(imidazole)ethane), has been synthesized by hydrothermal reaction. Its crystal structure was characterized by single-crystal X-ray diffraction analysis and IR spectroscopy. The X-ray single-crystal structure shows that complex 1 belongs to the monoclinic system, C2/c space group, a = 22.367(3), b = 8.2224(12), c = 18.615(4) Å, β = 126.21(0)°. The complex exhibits a complicated (3, 4)-connected 3D 3-fold interpenetrating network with a Schläfli symbol of (4²·6·10²·12)(4²·6) topology. The adjacent Zn ions were constructed of one-dimensional double chains, having dinuclear [Zn(COO)₂] units bridged by 5-Br-ip. Fluorescence measurements show that the complex has fluorescent emissions at 419 nm upon excitation at 361 nm.

KEYWORDS:

• Zinc(II) complex
• 5-bromoisophthalic acid
• 1,2-bis(imidazole)ethane
• crystal structure

Funding

This work was supported by the Natural Science Foundation of Henan Province (122300410418, 132200410404), and sponsored by the Doctor Foundation of Henan Polytechnic University (B2006-15).