Synthesis and characterization of different nanostructured copper(ii) metal–organic frameworks by a ligand functionalization and modulation method

Abstract

Nanorods of {[Cu₂(BDC)₂(dabco)]·2DMF·2H₂O} (1) and nanotubes of {[Cu₂(BDC-NH₂)₂(dabco)]·2DMF·2H₂O} (2) have been synthesized via reaction of copper(II) acetate with terephthalic acid and aminoterephthalic acid in the presence of triethylenediamine as the pillar ligand and acetic acid as the modulator. Formation of the unexpected nanotube morphology instead of nanorods was evidenced when aminobenzene-1,4-dicarboxylate [BDC-NH₂] was used instead of the benzene-1,4-dicarboxylate (BDC) ligand. Nanorods and nanotubes of compounds 1 and 2, respectively, were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and BET analyses.