Photo-bio-synthesis of irregular shaped functionalized gold nanoparticles using edible mushroom Pleurotus florida and its anticancer evaluation.

A green chemistry approach to the synthesis of gold nanoparticles using edible mushroom Pleurotus florida (Oyster mushroom) by photo-irradiation method has been attempted. The mixture containing the aqueous gold ions and the mushroom extract was exposed to sunlight; this resulted in the formation of biofunctionalized gold nanoparticles. These nanoparticles were characterized using various techniques like UV-visible spectroscopy; X-ray diffraction studies, Energy dispersive X-ray analysis, Field emission scanning electron microscopy, Atomic force microscopy, Transmission electron microscopy and Fourier transform infrared spectrometry. The obtained biofunctionalized gold nanoparticles showed effective anti-cancer property against four different cancer cell lines A-549 (Human lung carcinoma), K-562 (Human chronic myelogenous leukemia bone marrow), HeLa (Human cervix) and MDA-MB (Human adenocarcinoma mammary gland) and no lethal effect is observed in Vero (African green monkey kidney normal cell) cell lines.

Synthesis and antitumor studies on novel Co(II), Ni(II) and Cu(II) metal complexes of bis(3-acetylcoumarin)thiocarbohydrazone.

The synthesis, structure, physico-chemical investigation and biological studies of some metal complexes of thiocarbohydrazone ligands are described. The ligand is obtained by condensation of N,N'-thiocarbohydrazide with 3-acetylcoumarin. The metal complexes of Co(II), Ni(II) and Cu(II) with bis(3-acetylcoumarin)thiocarbohydrazone were synthesized and isolated as solid products and characterized by analytical means as well as by spectral techniques such as FT-IR, (1)H NMR and EPR and UV spectrometry. The ligand acts as bidentate, through NO or NN, neutral in coordinating the M(II) ions. The bonding sites are the azomethine nitrogen, lactone carbonyl oxygen and respective anion counterparts. The metal complexes exhibit either octahedral or distorted octahedral structures. The complexes are found to be soluble in dimethylformamide and dimethylsulphoxide. Molar conductance values in dimethylsulphoxide indicate the non-electrolytic nature of the complexes. The compounds tested in present study have shown promising cytotoxic activity when screened using the in vitro method and at the same time were shown to have good activity when tested using the Ehrlich Ascites Carcinoma model. Preliminary antimicrobial screening shows the promising results against both bacterial and fungal strains.