Antimicrobial Activity of Anionic Bis(N-Heterocyclic Carbene) Silver Complexes
Carlos J Carrasco1, Francisco Montilla1, Eduardo Villalobo2
1Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, 41012 Sevilla, Spain.
Molecules (Basel, Switzerland)
|October 16, 2024
Summary
Anionic bis(carbene) silver complexes exhibit potent antimicrobial properties against Gram-negative and Gram-positive bacteria. Notably, chiral complexes demonstrated a significant chirality-antimicrobial relationship, with specific enantiomers showing enhanced efficacy.
Area of Science:
- Coordination Chemistry
- Antimicrobial Agents
- Medicinal Chemistry
Background:
- Silver complexes with N-heterocyclic carbene (NHC) ligands are explored for their biological activities.
- Anionic bis(carbene) silver complexes offer a unique structural motif for investigation.
Purpose of the Study:
- To synthesize and characterize a series of anionic bis(carbene) silver complexes, Na3[Ag(NHC^R)2].
- To evaluate the antimicrobial properties of these complexes against various bacterial strains.
- To investigate the influence of chirality on antimicrobial activity.
Main Methods:
- Synthesis of anionic bis(carbene) silver complexes.
- Structural characterization using X-ray diffraction.
- Antimicrobial activity testing (MIC and MBC) against E. coli, P. aeruginosa, and S. aureus.
- Chiral analysis and 109Ag NMR spectroscopy.
Main Results:
- Complexes 2a-2g and 2c' were synthesized and characterized.
- Complexes 2a and 2b exhibited the strongest antimicrobial activity against all tested bacterial strains.
- A clear chirality-antimicrobial relationship was observed, with eutomer 2c' outperforming its enantiomer 2c.
Conclusions:
- Anionic bis(carbene) silver complexes possess significant antimicrobial potential.
- Chirality plays a crucial role in the antimicrobial efficacy of these silver complexes.
- Further research into these complexes could lead to novel antimicrobial agents.
Keywords:
N-heterocyclic carbeneX-ray crystallographyantimicrobialdensity functional theorynuclear magnetic resonancesilverMore Related Videos
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