Abstract
Two coordination polymers, {[Zn(bdc)(bimt)2]H2O}n (1) and {[Zn1.5(btc)(bimt)(H2O)3]
H2O
DMF}n (2), have been synthesized through reactions of 2-((benzoimidazol-yl)methyl)-1H-tetrazole (bimt) with Zn(NO3)2
6H2O in the presence of 1,4-benzenedicarboxylate (H2bdc) or 1,3,5-benzenetricarboxylate (H3btc). Single-crystal X-ray diffraction analyses show that 1 displays a 1-D zigzag chain structure constructed by 1,4-benzenedicarboxylates bridging adjacent Zn(II) ions. Solid 2 shows a 1-D ribbon-like molecular ladder in which three monodentate carboxylates link adjacent Zn1 ions along the crystallographic a-direction and connect Zn1 and Zn2 along the crystallographic c-axis. In the two polymers, all bimt are terminal ligands to complete the metal coordination sphere and help to assemble the low-dimensional coordination skeleton into high-dimensional ordered supramolecular architectures by N–H
O or N–H
N hydrogen-bonding. IR spectra, fluorescent properties and thermostabilities have been investigated.
Acknowledgment
We gratefully acknowledge the financial support by the National Natural Science Foundation of China (No. J0830412).