We have demonstrated that iron porpholactones could be effective catalysts for nitrogen atom transfer reactions such as aziridination of alkenes and amidation of alkanes using organic azides.
A resonant Raman spectroscopy study has been carried out under high pressure, using a diamond anvil cell, on carbon nanotube peapods ͑C 60 @SWNT͒ synthesized in high yield in our laboratory. The Raman signal was excited by a near IR laser ͑830 nm͒ to avoid photopolymerization of C 60 and thus obtain the intrinsic vibrational information on the C 60 molecules in the nanotubes. It is found that the surrounding tubes create an effective pressure on the encapsulated C 60 due to tube-fullerene interactions, resulting in a shift of the intrinsic A g ͑2͒ vibrational mode to 1474 cm −1 at ambient pressure. High pressure Raman spectroscopy indicates that ͑C 60 ͒ 2 dimers form near 1 GPa, and that a further polymerization of C 60 occurs near 23 GPa, creating linear chains of covalently linked C 60 molecules in the tubes.
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