Synthesis, structure and luminescence properties of new chalcogenide octahedral rhenium cluster complexes with 4-aminopyridine [{Re₆Q₈}(4-NH₂-py)₆]²⁺

Abstract

Two new cationic octahedral rhenium cluster complexes [{Re₆Q₈}(4-NH₂-py)₆]²⁺ (Q=S, Se; 4-NH₂-py = 4-aminopyridine) were synthesized by reactions of cesium salts of cluster anions [{Re₆Q₈}Br₆]^4−/3− with molten 4-aminopyridine. Both complexes were separated as salts with Br⁻ as counterions and the structure of [{Re₆S₈}(4-NH₂-py)₆]Br₂·6DMF was revealed by X-ray single-crystal diffraction analysis. The compounds were characterized by elemental analysis, energy dispersive X-ray, IR, NMR, and luminescence spectroscopies.

Keywords:

• Rhenium cluster
• 4-Aminopyridine
• Luminescence
• Crystal structure

Acknowledgements

K.A. Brylev thanks the Brain Pool Program through the Korean Federation of Science and Technology Societies (KOFST) funded by the Ministry of Science, ICT and Future Planning (151-S-1-3-1190) and Prof. N. Kitamura (Hokkaido University) for the opportunity to study the luminescence properties.

Funding

This work was supported by the Russian Foundation for Basic Research [grant number 15–33-20083]; The Grant of the President of the Russian Federation [grant number MK 4054.2015.3].