Technetium and Rhenium

Unusual metalloporphyrin complexes of rhenium and technetium.

Long-chain rhenium and technetium glucosamine conjugates.

A series of five glucosamine-conjugated organometallic complexes of the tricarbonyl cores of technetium-99m and rhenium were made. Glucosamine was derivatized at the C-2 nitrogen with long chain alkyl spacers linked to either pyridyl-tert-nitrogen-phenol tridentate chelates or cyclopentadienyl ligating groups. The metal complexes of the tridentate ligands were formed by refluxing with [Re(CO)(3...

Technetium and Rhenium - Coordination Chemistry and Nuclear Medical Applications

Compostos de coordenação do elemento radioativo tecnécio são empregados para diagnóstico em medicina nuclear, sendo vários complexos do nuclídeo emissor de radiação γ Tc usados rotineiramente na obtenção de imagens de órgãos. As tendências modernas da química radiofarmacêutica concentram-se na marcação de moléculas biologicamente ativas tais como peptídeos, esteróides ou outras espécies com rec...

Absorption behavior of technetium and rhenium through plant roots

The absorption behavior of technetium (Tc) and rhenium (Re) through plant roots was studied using nutrient solution culture. Radish samples, grown in culture solutions for 20-30 days in a greenhouse, were transferred into plastic vessels containing nutrient solutions contaminated with multitracer solutions including Tc and Re. The plant samples were grown individually for 1-7 days under laborat...

Lattice Dynamics of the Rhenium and Technetium Dichalcogenides

The rhenium and technetium dichalcogenides are layered van der Waals semiconductors which show a large number of Raman-active zone-centre phonon modes as a result of their unusually large unit cells and deviation from hexagonal symmetry. They thus offer the possibility of introducing in-plane anisotropy into composite heterostructures based on van der Waals materials, and Raman spectroscopy is ...