Abstract
An investigation of the impact of alkyl spacer length of the flexible ligands and influence of shape and coordination ability of the counterions has been done on a series of five silver(I)-bis(imidazole-2-thione) coordination polymers. The five compounds, namely, [Ag2L4(NO3)(2)](n), {[AgL4](2)[CF3SO3](2)}(n), [Ag2L6(CF3SO3)(2)](n), [Ag2L6(NO3)(ClO4)](n), and [(Ag2LBr2)-Br-6](n) (L-4 = 1,1'-(butane-1,4-diyl)-bis(3-methylimidazoline-2-thione) and L-6 = 1,1'-(hexane-1,4-diyl)-bis(3-methylimidazoline-2-thione) have been characterized by elemental analysis, IR spectra, thermogravimetric analysis (TGA), powder X-ray diffraction, and single crystal X-ray diffraction. In the title polymers, the L-4 and L-6 ligands exhibit unprecedented coordination modes, and the Ag(I) centers adopt a range of coordination geometries. The single crystal structural analysis of the title compounds shows that polymers based on the L-4 ligand predominately adopt AgS4 core structure which does not appear in the polymers containing L-6 ligand. The TGA experimental data reveal that these compounds start to decompose in the temperature range of 240-341 degrees C. All of the synthesized compounds, in particular, polymer 2, possess antibacterial activity against the selected strain of Gram-negative (Escherichia coli, Pseudomonas aeruginosa) and Gram-positive (Staphylococcus aureus, Bacillus subtilis) bacteria.
Item Type: | Journal article |
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Faculties: | Chemistry and Pharmacy > Department of Chemistry |
Subjects: | 500 Science > 540 Chemistry |
ISSN: | 1528-7483 |
Language: | English |
Item ID: | 54293 |
Date Deposited: | 14. Jun 2018, 09:55 |
Last Modified: | 04. Nov 2020, 13:33 |