Synthesis, Crystal Structure, and Optical and Photoelectrochemical Properties of a N∩O− Rhenium(I) Complex
摘要:
The neutral dimer complex Re-7(CO)(6)(BIZ)(2) was directly obtained from a simple reaction between Re(CO)(5)Cl and N boolean AND OH-type ligand 2(l-phenyl-1H-benzoimidazol-2-yl)phenol (HBIZ). The further reaction of Re-2(CO)(6)(BIZ)(2) with pyridine (Py) led to the monomeric Re(CO)(3)(BIZ)(Py), which was characterized by means of single-crystal X-ray diffraction analysis, H-1 NMR, elemental analysis, and UV-visible absorption, photoluminescence, and infrared spectroscopy as well as cyclic voltammetry. The photoelectrochemical properties of Re(CO)(3)(BIZ)(Py) spin-coated film modified indium-tin oxide electrode were investigated, and a large cathodic photocurrent up to 0.55 mu A/cm(2) at-0.3 V bias potential was observed. The LUMO and HOMO energy levels of Re(CO)(3)(BIZ)(Py) were studied by density functional theory calculations. The possible mechanism of the photocurrent generation was discussed.