Silver(I) Complexes with Camphorsulfonato and Phosphine Ligands: Structural Diversity and Antibacterial Activity

Inorg Chem. 2020 Aug 3;59(15):10557-10568. doi: 10.1021/acs.inorgchem.0c00982. Epub 2020 Jul 13.

Abstract

A series of silver(I) camphorsulfonato complexes containing various phosphine ligands having the stoichiometry [Ag(camphSO3)(PR3)] [PR3 = PTA (1,3,5-triaza-7-phosphaadamantane), PASO2 (2-thia-1,3,5-triaza-7-phosphaadamantane-2,2-dioxide), PPh3, PCy3, P(CH2CH2CN)3, PPyPh2, or P(o-tol)3] were prepared and fully characterized by NMR spectroscopic methods and X-ray crystallography. Depending on the nature of the phosphine, a variety of different supramolecular structures, including dimers, macrocycles, and coordination polymers, were observed in the solid state. The in vitro antimicrobial activity in seven different pathogens (Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Acinetobacter baumannii, Candida albicans, and Cryptococcus neoformans var. grubii) as well as toxicity in human cells was also examined. While all compounds show some activity against the bacteria, they were especially active against the fungus C. neoformans. The most active and at the same time least toxic compound was found to be the water-soluble complex [Ag(camphSO3)(PTA)2].

MeSH terms

  • Acinetobacter baumannii / drug effects
  • Anti-Bacterial Agents / chemical synthesis
  • Anti-Bacterial Agents / chemistry
  • Anti-Bacterial Agents / pharmacology*
  • Antifungal Agents / chemical synthesis
  • Antifungal Agents / chemistry
  • Antifungal Agents / pharmacology*
  • Candida albicans / drug effects
  • Cell Survival / drug effects
  • Coordination Complexes / chemical synthesis
  • Coordination Complexes / chemistry
  • Coordination Complexes / pharmacology*
  • Cryptococcus neoformans / drug effects
  • Crystallography, X-Ray
  • Erythrocytes / drug effects
  • Escherichia coli / drug effects
  • HEK293 Cells
  • Humans
  • Klebsiella pneumoniae / drug effects
  • Ligands
  • Models, Molecular
  • Organophosphorus Compounds / chemistry
  • Organophosphorus Compounds / pharmacology*
  • Phosphines / chemistry
  • Phosphines / pharmacology*
  • Pseudomonas aeruginosa / drug effects
  • Silver / chemistry
  • Silver / pharmacology*
  • Staphylococcus aureus / drug effects

Substances

  • Anti-Bacterial Agents
  • Antifungal Agents
  • Coordination Complexes
  • Ligands
  • Organophosphorus Compounds
  • Phosphines
  • Silver
  • phosphine