Structure, CO-releasing property, electrochemistry, DFT calculation, and antioxidant activity of benzimidazole derivative substituted [Mn(CO)3(bpy)L]PF6 type novel manganese complexes

•Synthesis of dark-stable and light-sensitive novel manganese complexes with benzimidazole derivative ligands.•Analytical, spectroscopic and electrochemical characterization of novel benzimidazole substituted manganese complexes.•CO-releasing properties and antioxidant activities of photoCORMs.•DFT/TDDFT analysis of novel manganese complexes with ORCA package program.

Metal carbonyl complexes are prominent group organometallic compounds because of their applications in industrial and pharmaceutical chemistry. In recent years, metal carbonyl complexes have been accepted major for storage and transportation of carbon monoxide which is an important signaling molecule significantly in pathogenesis of some diseases. Thus, we designed and synthesized novel manganese(I)carbonyl complexes with general formula [Mn(CO)3(bpy)L]PF6 (bpy = 2,2-bipyridyl, L = N-(2-chlorobenzyl)benzimidazole, N-(2-methoxybenzyl)benzimidazole, N-(2-methylbenzyl)benzimidazole). The complex molecules were characterized by LC-MS, 1H-NMR, 13C-NMR, IR spectroscopy methods and elemental analysis. The CO-releasing properties, antioxidant activities and redox properties of these complexes were investigated. The DFT/TDDFT analyses were made by ORCA package program.

Graphical abstractNovel photoCORMs with benzimidazole derivative ligands having dark-stable and light sensitive features were synthesized and characterized by analytical, spectroscopic and electrochemical methods. CO-releasing properties and antioxidant activities of these manganese complexes were evaluated. DFT/TDDFT analysis of the complexes with ORCA package program was also carried out.Figure optionsDownload full-size imageDownload as PowerPoint slide