'Tellurium' diaporamas de présentation

Catalyst

Catalyst. A quantitative observation involves numbers and measurement. A qualitative observation is descriptive. Classify these observations: There are 550 students at OHS. The sky is blue. My car is old. The door is 2.2 m tall.

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By: Tanner webelements/

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Coordination of Tellurium(IV) with Schiff Base Derived from o-Vanillin and 3-Aminopyridine

Seven new organyltellurium(IV) complexes with monobasic ON bidentate Schiff base ligand have been synthesized. The Schiff base ligand (3-APY-{o-VanH}) was prepared by condensation of o-vanillin with 3-aminopyridine. The newly synthesized organyltellurium(IV) complexes and Schiff base have been characterized by elemental analyses, conductivity measurements, FTIR and 1H NMR spectral studies. The structure of the complexes obtained was confirmed by FT-IR and proton NMR which exhibited pentacoordinated tellurium centre having ?-trigonal bipyramidal geometry. Schiff base as well as their organyltellurium(IV) complexes were also evaluated for their antimicrobial activities in vitro against Gram-positive bacteria (Staphylococcus aureus and Streptococcus pyogenes), Gram-negative bacteria (Pseudomonas aeruginosa and Escherichia coli) and fungii Candida albicans, Aspergillus niger and Aspergillus clavatus.

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Tellurium, the Key Tech Metal for Solar Panels

To overcome the imminent power crises, we need to better utilize the natural resources available. A chemist, Sarah Hayes, from the University of Alaska states that scientists around the world need to take a much closer look at the technology metal known as tellurium.

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