Synthesis, Structural Characterization, Photophysical Properties, and Antibacterial Assessment of Silver(I)-Thione Coordination Polymers Based on a Competition between Nitrate Anion and Coanions CF₃SO₃^–, ClO₄^–, BF₄^–, PF₆^–, and SbF₆^–

Abstract

Six new coordination polymers, namely, [Ag 2 L-(NO 3 ) 2 ] n (1), {[Ag 6 L 4 (CF 3 SO 3 ) 4 ][CF 3 SO 3 ] 2 } n (2), {[Ag 2 L-(NO 3 )][ClO 4 ]} n (3), {[Ag 2 L(NO 3 )][BF 4 ]} n (4), {[Ag 2 L(NO 3 )]-[PF 6 ]} n (5), and {[Ag 2 L(NO 3 )][SbF 6 ]} n (6), have been successfully synthesized by the reaction of AgNO 3 and selected coanions CF 3 SO 3 − , ClO 4 − , BF 4 − , PF 6 − , and SbF 6− with 1,3-bis(1methylthioimidazolyl) propane under the same experimental conditions in order to illustrate coordination ability of nitrate ion relative to the other considered coanions. To evaluate this competition, compound 1 as a reference structure was synthesized in the absence of coanions. In its two-dimensional structure, the thione ligand appears in a hexadentate mode, and the nitrate as a coligand is coordinated in a bidentate fashion. In a competition between the silver nitrate and triflate, despite the coordination ability expected for both anions, these anions did not appeared together in the structure of compound. The moderately coordinating anion CF 3 SO 3 − build up a cationic structure with only one kind of anion. In contrast to polymers 1 and 2, in the valuable networks 3−6, for the first time extraordinarily two kind of anions were involved in their structures. The difference between the coordination ability of the considered coanions is the most effective factor that impacts the coordination and linkage modes of the flexible ligand and nitrate anion and in turn directs the construction of coordination polymers. In general, X-ray diffraction analysis reveals that the most changes in the structure of compounds 3−6 relative to the structure of 1 were generated by the bulky, uncoordinated anions PF 6 − and SbF 6 − . The thermogravimetric analysis experimental data reveal that these compounds start to decompose in the temperature range of 140−328 °C. In their electronic spectra, a sharp band at 246 nm due to the π → π* transitions in the CS moiety of the ligand is slightly red-shifted upon coordination of the ligand to Ag I ions via sulfur atoms. All of the synthesized compounds display strong blue emissions in the solid state. The title complexes possess antibacterial activity against the selected strain of Gram-negative (Escherichia coli, Pseudomonas aeruginosa) and Grampositive (Staphylococcus aureus, Bacillus subtilis) bacteria.

Silver(I) complexes ofN,N′‐diarylformamidine ligands: Synthesis, crystal structures, and in vitro antibacterial studies

“…Some of the tested silver complexes possess relatively good antimicrobial properties because complexes are mostly bacterial agents that can kill target bacteria at a low concentration. [ 44 ] The high antibacterial potential of these complexes is due to the presence of Ag(I) ion in the structure of complexes which is capable of dismantling the pathogen metabolic pathway via multiple mechanisms. [ 45 ] It has been reported that Ag(I) metallodrugs work by disabling numerous cellular enzymes that are central to respiration and metabolism or by denaturing cellular macromolecules and will eventually inhibit normal cellular functions.…”

Synthesis, Crystal Structures, H2S, and Iodine Uptake Properties of Four New Coordination Polymers Constructed from Group 12 Transition Metal Ions and a Bidentate Sulfur Donor Ligand

“…Recently, various coordination polymers (CPs), metal organic frameworks (MOFs), and covalent organic frameworks (COFs) have been reported as new candidates for the removal of iodine. ,, In the structure of these polymers, the nature of metals, kind of ligands, counterions, type of solvents, and reaction conditions play a vital role. Alternatively, there is a rapid growth in the manufacturing of the ligands with O, N, and S donor atoms to use in the CPs and MOFs. − In particular, the systematic designs of sulfur-containing ligands have been investigated in bioinorganic chemistry and for their ability to create various coordination network architectures. , Following our ongoing research on the development of coordination polymers with S donor ligands, ,, herein, we report four novel metal–organic frameworks with d 10 transition metals of group 12 and L s (pbit) ligand [where L s or pbit = 1,1′-(pentane-1,5-diyl)­bis­(-3-methyl-1 H -imidazole-2-thione)]. The title polymers were applied as an adsorbent for hydrogen sulfide and also used for iodine removal.…”

“…40−42 In particular, the systematic designs of sulfur-containing ligands have been investigated in bioinorganic chemistry and for their ability to create various coordination network architectures. 43,44 Following our ongoing research on the development of coordination polymers with S donor ligands, 20,45,46 herein, we report four novel metal−organic frameworks with d 10 transition metals of group 12 and L s (pbit) ligand [where L s or pbit = 1,1′-(pentane-1,5-diyl)bis(-3-methyl-1H-imidazole-2thione)]. The title polymers were applied as an adsorbent for hydrogen sulfide and also used for iodine removal.…”

The Paramagnetic or Spin Crossover Iron(III) Complexes Based-on Pentadentate Schiff Base Ligand: Crystal Structure, and Magnetic Property Investigation

“…[19][20][21][22][23][24][25] It was generally found that the metal centers with the 3d 4 -3d 7 electronic configurations and involved in octahedral coordination surroundings could readily occur spin transition between the different spin states. [26][27][28] Among 3d 4 -3d 7 metal ions, the strong interest has always been devoted to the switchable molecular materials centered with iron(II) ion. During the past several decades, a great deal of the Fe(II)-based complexes with various structure types from 0D clusters, 1D infinite chains to 2-3D networks and interesting SCO properties have been reported.…”