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Carbon nanotubes have unique properties like high stability, high surface to mass ratio and so on which make them suitable for medicinal purpose applications. Treatment of cancer by organoplatinum agents like Cisplatin has become unresponsive in most cases due to low distribution of drug in biological fluids, inability of drug to cross cellular membranes and low stability in biological environments. Recently, carbon nanotubes (CNT) have stimulated much interest to overcome these limitations. ‎‎ Herein, we report the preparation of single-wall carbon nanotube functionalized by diaminedicarboxyplatinum (II) as an analogy of SWCNT-based Carboplatin. Functionalization was started by cyclopropanation through Bingel reaction and by use of diethylmalonate to yield cyclopropane-1,1-dicarboxy ethyl ester. Final product was obtained by hydrolysis of ester group and then chelation of platinum (IV) by dicarboxylate groups on the surface of SWCNT. Raman and Fourier transform -Infrared ‎spectroscopy (IR), ‎Thermogravimetric ‎analysis ‎(TGA) and energy dispers‎ive X-ray‎spectroscopy ‎(EDAX) truly showed and confirmed the presence of the platinum (II) complex on the side wall of SWCNT. Cytotoxicity evaluation of the functionalized-SWCNTs on HeLa cells showed its higher anticancer ability than Cisplatin as indicated by IC50 value of 13 µg/mL.

Preparation of Diaminedicarboxyplatinum (II) Functionalized Single-Wall Carbon Nanotube via Bingel Reaction as a Novel Cytotoxic Agent