• Dr Kasturi Sanyal

Abstract: Tannic acid is a specific commercial form of tannin, a type of polyphenol. Its weak acidity (pKa around 10) is due to the numerous phenol groups in the structure. The chemical formula for commercial tannic acid is often given as C76H52O46. Its structure is based mainly on glucose esters of gallic acid. It is a yellow to light brown amorphous powder which is highly soluble in water. Tannic acid is a basic ingredient in the chemical staining of wood. The tannic acid or tannin is already present in woods like oak, walnut, and mahogany. Today tannic acid is used in pharmaceutical applications to produce albumine tannate which is used as an anti-diarrhea agent. They found that Tannins have also been reported to exert many physiological effects, such as to accelerate blood clotting, reduce blood pressure, decrease the serum lipid level, produce liver necrosis, and modulate immune responses. Tannic acid due to its extensive donating centers can act as very good chelator. Already tannic acid complexes of copper and Iron were reported. In diagnostic medical science tannic acid is used for detecting peptic ulcer where Technetium-99m is used as the main radio active metal. In this work Mn complexes of tanic acid has been synthesized as Mn belong to the same group of Tc. The Complex is polymeric in nature which is insoluble in all common solvents. The complex is paramagnetic with only one unpaired electron which was proved by electron spectra

tannic acid , green method

"Synthesis of Manganese complexes of tannic acid in green method", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 12, page no.g431-g439, December-2024, Available :http://www.jetir.org/papers/JETIR2412648.pdf

"Synthesis of Manganese complexes of tannic acid in green method", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 12, page no. ppg431-g439, December-2024, Available at : http://www.jetir.org/papers/JETIR2412648.pdf