A cobalt complex of a pentadentate aminopyridine ligand as an efficient catalyst for photocatalytic hydrogen generation |
| |
| Affiliation: | 1. Anhui Key Laboratory of Functional Coordination Compounds, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246011, PR China;2. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China |
| |
| Abstract: | A linear pentadentate aminopyridine ligand 2,6-bis(methyl(pyrid-2-ylmethyl)amino)-N-methyl]pyridine (PyMepam) has been prepared and characterized. This ligand readily coordinates with Co(II) or Zn(II) ions, and the resulting complexes of general formula M(PyMepam)](BF4)2 (M = Co (1) and M = Zn (2)) have been thoroughly characterized and investigated for electro- and photocatalytic water reduction in acetonitrile. Electrochemical studies reveal that the complex 1 is active for electrocatalytic water reduction in acetonitrile. Under visible-light irradiation (λ > 400 nm), the complex 1 displays hydrogen evolution activity when in presence of Ir(ppy)2(bpy)]PF6 as photosensitizer and triethylamine (TEA) as electron donor, whereas 2 shows negligible catalytic activity under the same conditions. Highest turnover numbers (TONs) of 290 for H2 evolution are achieved from an optimized system containing 1 (0.1 mM), Ir(ppy)2(bpy)](PF6) (0.5 mM), and 10 vol% TEA in CH3CN-H2O (1/1, v/v) mixed solvents at pH 10. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
