874894-70-9Relevant academic research and scientific papers
Syntheses, structures, and antimicrobial activities of light-stable and di- and mononuclear silver(I) carboxylate complexes composed of triphenylphosphine, and chiral and racemic forms of 2-pyrrolidone-5-carboxylic acid (H 2pyrrld). A variety of Ag-o bonding modes in the silver(I) complexes constructed with hard oxygen and soft phosphorus atoms
Noguchi, Ryusuke,Sugie, Akiyoshi,Okamoto, Yohei,Hara, Akihiro,Nomiya, Kenji
, p. 1953 - 1962 (2005)
Using light-stable dimeric silver(I) carboxylate precursors {[Ag(Hpyrrld)]2}n formed with chiral and racemic forms of 2-pyrrolidone-5-carboxylic acid (H2pyrrld) ligand, six novel light-stable, triphenylphosphinesilver(I) complexes consisting of both a hard Lewis base (O atom) and a soft Lewis base (P atom) were prepared, i.e. [Ag 2(R-Hpyrrld) 2(H2O)(PPh3) 2]·H2O (1), [Ag(R-Hpyrrld)(PPh3) 2]2 (2), [Ag2(S-Hpyrrld)2(H 2O)(PPh3)2]·H2O (3), [Ag(S-Hpyrrld)(PPh3)2]2 (4), {[Ag(R,S-Hpyrrld)(PPh3)]2}n (5), and [Ag(R,S-Hpyrrld)(PPh3)2] (6). Their solid-state and solution structures were unequivocally characterized with elemental analysis, TG/DTA, FTIR, X-ray structure analysis, molecular weight measurements in EtOH with the vaporimetric method, solution (1H, 13C, and 31P) NMR, and solid-state 31P CPMASNMR spectroscopy. Two sets of the enantiomeric complexes were isolated as (1 and 3) and (2 and 4). X-ray crystallography revealed that these complexes possessed different Ag-O bonding modes, depending on the number of PPh3 ligands and the chirality of the Hpyrrld- ligand. The complexes 1-6 behaved as a monomeric species in EtOH and CD2Cl2. The antimicrobial activites by the silver(I) complexes in the water-suspension system against selected bacteria, yeast, and molds, were significantly correlated with the number of coordinating PPh3 ligands per silver(I) atom in the complexes.
