Energy Transfer between CNT Surface and -Re(CO)3(phen)+∗ Pendants Grafted to P4VP in Nanohybrid Shish-Kebob-like Structures

The adsorption of a Re(CO)3(phen)-poly-4-vinyl pyridine polymer, RePVP, on multiwall carbon nanotubes (MWCNTs) surfaces is studied by transmission electron microscopy (TEM) and absorption spectroscopy in combination with chemometric techniques in MeOH/H2O solvent mixture. Nanohybrid structures like a shish-kebab (NHSK) are observed by TEM when RePVP is wrapped around carbon nanotubes (CNTs) surfaces. The association between RePVP and CNTs studied by absorption spectroscopy suggests the coexistence of CNTs with a high or low content of adsorbed RePVP in their surface. In the absence of CNTs, the photophysical properties of RePVP ((i.e. luminescence quantum yield, ΦL, and amplitude weighted average lifetimes, ), ) are strongly dependent on the morphology of the polymer as witnessed by the dependence of ΦL with the concentration of RePVP (CRePVP) and the fact that in CH3CN ΦL and are sensitive to O2 while in a MeOH/H2O solvent mixture they are not. In the NHSK, an energy transfer process between excit...