The invention relates to a
benzimidazole zinc complex and a preparation method thereof. A chemical name of the
benzimidazole zinc complex is dichloro-2-(2-(1H-
benzimidazole-2-)benzyl)-1H-benzimidazole
zinc complex. The preparation method includes following steps: mixing 2-(carboxymethyl)
benzoic acid with o-phenylenediamine, placing the mixture in
phosphoric acid, performing a heating process at 180 DEG C for 3 hours to obtain a purple-green reactant, cooling the reactant to
room temperature, adding
distilled water, performing a
neutralization reaction to obtain a yellow-green
solid, performing a washing process through
distilled water for three times, carrying out a filtering process, carrying out a recrystallization process through
alcohol to obtain a yellow-green
solid 2-(2-(1H-benzimidazole-2-)benzyl)-1H-benzimidazole, namely a ligand, dissolving ZnCl2 and the ligand 2-(2-(1H-benzimidazole-2-)benzyl)-1H-benzimidazole in a proper amount of a DMF
solvent to obtain a mixture, stirring the mixture uniformly at
room temperature, performing a volatilization process for seven days to obtain a slight yellow-green block-shaped complex monocrystal. The complex employs biological non-toxic element zinc as a
metal ion, can be used for preparing antitumor drugs, can inhibit generation of
esophagus cancer cells, and is free from remaining in
human body and causing poisoning in
human body due to
metal accumulation. The complex is simple in the preparation method, is high in yield, is low in cost and is suitable for an industrial production.