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Résumé:

Phthalocyanine molecules (Pc) are encapsulated into the hollow core of single-wall carbon nanotubes (NT) in order to tailor the opto-electronic properties of the 1D hybrid systems (Pc@NT). Non covalent functionalization at the outer surface of the tube is also investigated as reference sample (PcNT). Phthalocyanine molecules are used as they display strong absorption in the red visible range (around 670 nm). Encapsulation efficiency are investigated by Transmission Electron Microscopy and x-ray diffraction. The x-ray diffractograms strongly suggest a specific structural organization close to the -phase inside the nanotubes. Infrared spectra of confined phthalocyanine molecules confirm the structural properties suggested by x-ray diffraction. Raman spectra display significant differences depending on the molecule localization (either inside or outside the nanotubes). Into the hollow core of the NT, Pc molecule exhibits a “free-like” behavior. By contrast, at the outer surface of the nanotubes, the shift of the high frequency modes suggests a strong interaction between the central metal atom and the nanotubes walls. The nature of the central atom also influences the physical interaction between the confined molecule and the host carbon nanotubes.