Synthesis and spectroscopic properties of osmium based polypyridyl compound, cis-Os^II(phen)₂Cl₂, and its one-electron oxidation product [cis-Os^III(phen)₂Cl₂](PF₆)

Abstract

Compound 1, cis-Os^II(phen)₂Cl₂, was obtained by reaction of (NH₄)₂OsCl₆ with phen in ethylene glycol (phen = 1,10-phenanthroline). Cyclic voltammetry was employed to investigate the redox characteristics of 1. Based on the oxidation potential of 1, Cp₂Fe^III(PF₆) was chosen as oxidant for the preparation of 2, [cis-Os(phen)₂Cl₂](PF₆). Both 1 and 2 were characterized by IR, electronic absorption spectra and elemental analysis, respectively. In addition, 2 was characterized by single-crystal X-ray diffraction analysis. There exists ¹MLCT and ³MLCT transition in both the electronic absorption and emission bands of 1 and 2.

Keywords:

• Osmium
• crystal structure
• electrochemistry
• electronic absorption spectra

Acknowledgments

We thank the Science and Technology Research Project of Hubei Provincial Department of Education (China, No. D20214302), the Third Batch of Hubei Provincial Youth Talent Development Plan Project (China, No. QNYC201901), and the Scientific Research Project of Jingchu University of Technology (China, No. ZD202101) for financial support.

Disclosure statement

The authors declare no competing interests.