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Abstract
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—Two crystalline materials C18H16N3O3 (1) and C10H8N2⋅C8H7NO4 (2) have been synthesized
under solvothermal conditions with different time and temperatures. The structure of 1 have been determined
by single-crystal X-ray diffraction analysis. Both structures were also characterized by FT-IR, powder X-ray
diffraction (PXRD), thermogravimetric analysis (TGA) and Field Emission Scanning Electron Microscopy
(FESEM) techniques. Both crystals are constructed from the same organic ligand (2-aminoterephthalic acid
and 4,4-bipyridine), however, they present varied functional groups, amide for 1 and amine for 2, indicating
formylation of NH2 groups of organic linkers during the synthesis process in 1. The adsorption potential of
the samples for cationic Methyl violet (MV) and Methylene blue (MB) dyes uptake from aqueous solution
was examined by UV-Vis spectrophotometer. The result showed that the adsorption rate of these cationic dyes
with 1 containing amide group is higher than 2 with amine group, due to stronger acid-base interaction
between amides and cationic dyes.
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