Platinum on reaction with halogen forms three halides viz., platinum (II) chloride, platinum (II) bromide and platinum (II) iodide, except platinum (II) fluoride. In this research work, the not existence of PtF<sub...Platinum on reaction with halogen forms three halides viz., platinum (II) chloride, platinum (II) bromide and platinum (II) iodide, except platinum (II) fluoride. In this research work, the not existence of PtF<sub>2</sub> has been studied theoretically. For this thermodynamic, valence bond theory and molecular orbital theory based study have also been performed on this molecule. In order to obtain minimum energy structure we optimized the geometry of this halide by opting AM1 for thermodynamic work and EHT for population analysis. All the calculations were performed on CAChe software. The thermodynamic study supported the presumption of disproportion reaction: 2PtF<sub>2</sub> →Pt + PtF<sub>4</sub>. V.B.T showed sd-hybridization rather than sp-hybridization. This was supported by our data as evaluated theoretically by adopting Landis concept, which showed negligible contribution of 5s-orbital of platinum. Mulliken’s population analysis based studies have pointed that the overlap is very poor due to the dis-similarity of energy of combining orbitals of Pt and F atom. The ΣΦ is very small that is 0.2. This also proved that PtF<sub>2</sub> failed to match the criteria of overlapping and thus MOT too. Using eigenvalues and population analysis MO diagram has also been drawn, which clearly supported non-existence of PtF<sub>2</sub> in nature but its existence in situ and thus also supported the presumption of disproportionation reaction.展开更多
P(St-BA-VBT)/dye colored nanoparticles were prepared by staining P(Styrene-Butyl Acrylate-Vinyl Benzyl Trimethylammonium chloride) nanoparticles synthesized by soap free cationic emulsion polymerization with reactive ...P(St-BA-VBT)/dye colored nanoparticles were prepared by staining P(Styrene-Butyl Acrylate-Vinyl Benzyl Trimethylammonium chloride) nanoparticles synthesized by soap free cationic emulsion polymerization with reactive dyes. The effects of reactive dyes dosage, dyeing temperature and time on amounts of dyes adsorbed on the nanoparticles were analysed. Results showed that when Reactive Red 195 dosage was5.25%, the adsorption amounts of dyes on the nanoparticles reached a maximum value of 18.64 mg/g at 65℃ for 90 min.展开更多
文摘Platinum on reaction with halogen forms three halides viz., platinum (II) chloride, platinum (II) bromide and platinum (II) iodide, except platinum (II) fluoride. In this research work, the not existence of PtF<sub>2</sub> has been studied theoretically. For this thermodynamic, valence bond theory and molecular orbital theory based study have also been performed on this molecule. In order to obtain minimum energy structure we optimized the geometry of this halide by opting AM1 for thermodynamic work and EHT for population analysis. All the calculations were performed on CAChe software. The thermodynamic study supported the presumption of disproportion reaction: 2PtF<sub>2</sub> →Pt + PtF<sub>4</sub>. V.B.T showed sd-hybridization rather than sp-hybridization. This was supported by our data as evaluated theoretically by adopting Landis concept, which showed negligible contribution of 5s-orbital of platinum. Mulliken’s population analysis based studies have pointed that the overlap is very poor due to the dis-similarity of energy of combining orbitals of Pt and F atom. The ΣΦ is very small that is 0.2. This also proved that PtF<sub>2</sub> failed to match the criteria of overlapping and thus MOT too. Using eigenvalues and population analysis MO diagram has also been drawn, which clearly supported non-existence of PtF<sub>2</sub> in nature but its existence in situ and thus also supported the presumption of disproportionation reaction.
基金National Natural Science Foundation of China(51173086)National Key Technology R&D Program(2014BACl3802),(2014BAE01801)Industriafization Projects of Major Independent Innovation Achievements of Shandong Province(2012ZHZXlA 0914)
文摘P(St-BA-VBT)/dye colored nanoparticles were prepared by staining P(Styrene-Butyl Acrylate-Vinyl Benzyl Trimethylammonium chloride) nanoparticles synthesized by soap free cationic emulsion polymerization with reactive dyes. The effects of reactive dyes dosage, dyeing temperature and time on amounts of dyes adsorbed on the nanoparticles were analysed. Results showed that when Reactive Red 195 dosage was5.25%, the adsorption amounts of dyes on the nanoparticles reached a maximum value of 18.64 mg/g at 65℃ for 90 min.
