New gold(I) and silver(I) complexes with organophosphorus ligands with SPNSO skeleton. Crystal and molecular structures of monomeric [Au{(SPPh2)(O2SR)N}(PPh3)] (R=Me, C6H4Me-4) and dimeric [Ag{(SPPh2)(O2SPh)N}(PPh3)]2·2CH2Cl2

Synthesis, characterization, electrospinning and antibacterial studies on triphenylphosphine-dithiphosphonates Copper(I) and Silver(I) complexes

Background

The novel amido and O-ferrocenyldithiophosphonates [FcP(S)(SH)(NHR¹)] (Fc = Fe(η⁵-C₅H₅)(η⁵-C₅H₄), R¹ = 1-(4-fluorophenylethyl and benzyloxycyclopentyl) and [FcP(S)(OR²)S⁻][H₃N⁺C(CH₃)₃] (R² = myrtanyl) were synthesized by the reaction of [(FcPS₂)]₂ (Fc = Fe(η⁵-C₅H₅)(η⁵-C₅H₄)) and chiral amines, such as (S)–(−)-1-(4-fluorophenylethyl) amine and (1S,2S)-(+)-benzyloxycyclopentyl amine, and of (1S), (2S), (5S)-myrtanol in toluene. The reaction of ferrocenyldithiophosphonates and [Cu(PPh₃)₂]NO₃ or AgNO₃ and PPh₃ gave rise to copper(I) and silver(I) complexes in THF. [Ag₂{FcP(OMe)S₂}₂(PPh₃)₂] and [Cu(PPh₃)₂]NO₃ were embedded into nanofibers and their antimicrobial activities on fibers were also investigated.

Results

The compounds have been characterized by elemental analyses, IR, NMR (¹H-, ³¹P-) spectroscopy as well as MS measurements. Nanofibers were obtained by electrospinning method which is the simplest and most effective method to produce nanoscale fibers under strong electrical field. Antimicrobial activity of the compound 5, [Ag₂{FcP(OMe)S₂}₂(PPh₃)₂], and [Cu(PPh₃)₂]NO₃ on fibers were studied.

Conclusions

In this study, the new dithiophosphonate ligands were synthesized and utilized in the preparation of copper(I) and silver(I) complexes with ferrocenyldithiophosphonate and triphenylphosphine. Then, the compounds [Ag₂{FcP(OMe)S₂}₂(PPh₃)₂] and [Cu(PPh₃)₂]NO₃ were added into the PAN solutions (Co-PAN dissolved in dimethylacetamide) and the solutions were electrospun onto microscope slides and PP meltblown surfaces. Antimicrobial activity of the compounds [Ag₂{FcP(OMe)S₂}₂(PPh₃)₂] and [Cu(PPh₃)₂]NO₃ on fibers were determined in vitro against two indicator strains; M. luteus NCIB and E. coli ATCC25922. The obtained results indicated that these metals showed moderate level antimicrobial activities.

Novel Gold(I) and Silver(I) Complexes of Phosphorus-1,1,-dithiolates and Molecular Structure of [O,O'-(Bornyl)2PS2]H3NC(CH3)3

BACKGROUND

The novel chiral phosphorus-1,1-dithiolates [4-CH3OC6H4P(S)(OR)S]-[H3NC(CH3)3]+ were synthesized by the reaction of [RPS2)]2 (R = 4-MeOC6H4) or P2S5 and the respective alcohol ROH (R = myrtanyl, 2-naphthylethyl, myrtenyl, borneol) in toluene. The reaction of phosphorus-1,1-dithiolates 1-4 and Au(tht)Cl, AuClPPh3 or AgNO3 and PPh3 gave rise to gold(I)- and silver(I)-complexes in THF. All compounds have been characterised by elemental analyses, IR, NMR (1H-, 13C- and 31P-) spectroscopy as well as MS measurements. Optical rotation values confirmed the chirality of the compounds. The Compound 4 has been characterized structurally by X-ray crystallography.

RESULTS

Phosphorus-1,1,-dithiolate compounds were formed as liquids and were treated with suitable amine in order to convert them to their salts 1-4 . They have been successfully characterized spectroscopically (IR, 1H, 13C, 31P NMR) as well as mass spectra. The compound 4 has been also structurally by X-ray crystallography. The compound 4 crystallizes in the orthorhombic space group P2(1)2(1)2(1) with Z = 4. Compounds containing phosphorus and sulfur donor atoms are excellent ligands due to offering many metal complexes especially group 11-12 metals. The synthesis of gold(I) and silver(I) complexes with chiral phosphorus-1,1,-dithiolate and triphenylphosphine have been described and investigated.

CONCLUSIONS

In the present work, we report the synthesis, charactreization of the chiral phosphorus-1,1-dithiolate ligands and preparing the gold(I) and silver(I) phosphorus-1,1-dithiolate or S-donor with phosphine complexes. The molecular structure of the Compound 4 was determined by X-ray diffraction. Due to an easy synthesis method of phosphorus-1,1-dithiolate compounds and a good complexion reagent, it is possible the improvement of the collecting metallic gold or silver from the minerals. When the more ionic salt of phosphorus-1,1-dithiolate compounds were prepared in this way, the water can be used as a cheap solvent. As a result, it can be an alternatively method for the collecting metallic gold or silver from the minerals in future.