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KEYWORDSThis paper deals with the up-conversion intrinsic photoluminescence by exciting the MetalloPhthalocyanine (MPc) prepared by melt method. MPcs were further characterized using UV visible spectrophotometer, FT-IR, and thermal analysis. The magnetic susceptibility, optical absorption and photoluminescence behavior of these compounds were studied. Photocatalytic degradation of amido black 10B dye using different MPcs at varing pH was done to see the efficiency of these compounds. High emission intensity and easy preparation makes these systems potential candidates for application as luminescent material.

The free base tetraphenyl porphyrin (TPP) and its metalloporphyrins such as tetraphenylporphinatomanganese chloride (MnTPPCl), μ-Oxo-bis [tetraphenylporphinatomanganese [O-(MnTPP) 2 ], tetraphenylporphinatoiron chloride (FeTPPCl) and μ-Oxo-bis [tetraphenylporphinatoiron] [O-(FeTPP) 2 ] were synthesized in the laboratory and characterized by UV-visible, IR, Proton NMR and Fluorescence spectroscopy. Diffused reflectance spectroscopy revealed that all these compounds are low band gap semiconducting type materials. The photo-degradations of Amido Black 10B were performed to explore the photo-catalytic activity of these porphyrins using solar radiation at different pH conditions. In the present experiment attempts were made to use metal porphyrins without any supporting material, indirectly also to prove the photodynamic capabilities of these materials. It was revealed that pH plays an important role in the degradation of dye. The HPLC analysis of the product showed three components with same retention time irrespective of pH and ion chromatography indicated the mineralization of dye during degradation process. The results have shown the mineralization of the dye by redox reactions that are taking place at the respective groups present in the dye molecule. This eco-friendly remediation appears as a promising technique for degradation or mineralization of organic matter from contaminated water resources.

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This manuscript highlights the structural, electrical and optical properties of Bi2Mo1-xWxO6 (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) compounds. These compounds were prepared employing the citrate sol-gel method. These compositions were characterized using thermo-gravimetric and differential scanning calorimetry, X-ray diffraction and infrared techniques. The Rietveld refinements of X-ray powder diffraction data determined and confirmed the crystal structure of the compositions. DC electrical conductivity indicated the conduction behaviour and diffuse reflectance spectroscopy confirmed the semiconducting nature of the compounds. Room temperature photoluminescence results exhibited two type of emission namely blue-green and green emission in the visible region.