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Pyridylbenzimidazole based Re(i)(CO) 3 complexes: antimicrobial activity, spectroscopic and density functional theory calculations.
- Source :
-
RSC advances [RSC Adv] 2019 May 14; Vol. 9 (26), pp. 15108-15114. Date of Electronic Publication: 2019 May 14 (Print Publication: 2019). - Publication Year :
- 2019
-
Abstract
- fac -[ReBr(CO) <subscript>3</subscript> (L <superscript>1,2</superscript> )] L <superscript>1</superscript> = 1-ethyl-2-(pyridin-2-yl)benzimidazole (1) and L <superscript>2</superscript> = 1-[(pyridin-2-yl) benzimidazole]-propyl-sulfonic acid (2), fac -[Re <subscript>2</subscript> Br <subscript>2</subscript> (CO) <subscript>6</subscript> L <superscript>3</superscript> ] (3) L <superscript>3</superscript> = 1,1'-(hexane-1,6-diyl)bis[2-(pyridin-2-yl)1 H -benzimidazole] and fac -[ReBr(CO) <subscript>3</subscript> (L <superscript>4,5</superscript> -κ <superscript>2</superscript> N <superscript>1</superscript> N <superscript>2</superscript> )] (L <superscript>4</superscript> = 2,6-bis(benzimidazol-2'-yl)pyridine (4) and L <superscript>5</superscript> = 2,6-bis(1-ethyl-benzimidazol-2'-yl)pyridine (5) were synthesized and fully characterized using different spectrocopic and analytical tools. The spectrocopic data showed coordination of L <superscript>1-3</superscript> to fac -ReBr(CO) <subscript>3</subscript> via the benzimidazole and pyridine N-atoms. For 4 and 5, the absence of a two-fold axis of symmetry for L <superscript>4,5</superscript> in the <superscript>1</superscript> H NMR spectra reflect the κ <superscript>2</superscript> N <superscript>1</superscript> ,N <superscript>2</superscript> mode of coordination. The electronic properties of 1-5 were investigated by time-dependent density functional theory calculations in the singlet and triplet states. The ligands and their Re(i) complexes were assessed for their potential antimicrobial activity. Compound 5 was screened against non-malignant cell line (noncancerous human embryonic kidney cell line (HEK293)) as well as evaluated for its blood compatibility.<br />Competing Interests: There are no conflicts to declare.<br /> (This journal is © The Royal Society of Chemistry.)
Details
- Language :
- English
- ISSN :
- 2046-2069
- Volume :
- 9
- Issue :
- 26
- Database :
- MEDLINE
- Journal :
- RSC advances
- Publication Type :
- Academic Journal
- Accession number :
- 35516293
- Full Text :
- https://doi.org/10.1039/c9ra01566c