Resonance Raman family

A number of cyano-bridged complexes are included here even though they strictly do not fall in the general family-type defined for the section. The syntheses and photophysical properties of [(NC)(bpy)2Ru(/r-NC)Cr(CN)5] and [(NC)5Cr(Ai-CI Ru(bpy)2(M-NC)Cr(CN)5] have been described. Absorption of visible light by the Ru(bpy)2 unit results in phosphorescence from the Cr(CN)g luminophore, and the results evidence fast intramolecular exchange energy transfer from the MLCT state of the Ru(bpy)2 chromophore to the doublet state of the Cr -based unit. Time-resolved resonance Raman and transient UV-vis absorption spectroscopies have been employed to investigate the MLCT excited states of [(NC)(bpy)2Ru(//-CN)Ru (bpy)2(CN)], [(NC)(bpy)2Ru(//-CN)Ru(phen)2(CN)]+, [(NC)(phen)2Ru(//-CN)Ru (bpy)2(CN)]+, [(NC)(bpy)2... 

From a biological perspective the bleomycin (BLM) family of antibiotics that are used widely in chemotherapy, have stimulated considerable effort in understanding oxygen activated iron complexes. In particular iron bleomycin reacts with oxygen to form the so-called purple species, which exhibits an absorption band around 600 nm that is now known to be characteristic of the Fe -OOH species. In the case of Fe-BLM the active intermediate has been identified spectroscopically as a low-spin Fe -hydroperoxide. Several structural mimics of the metastable purple Fe -OOH species have been prepared, in particular complexes with neutral pentadentate ligands e.g., l,l-di(pyiidin-2-yl)-N,N-bis(pyridin-2-ylmethyl)-ethanamine (N4Py) Resonance Raman spectroscopy has proven... 

There have been numerous IR, Raman and resonance Raman studies on single-walled carbon nanotubes. " IR and Raman spectroscopy were used to characterise multilayer carbon nanotubes at different stages of their purification. The radial vibrational mode of the nanotube walls was found at 120 cm". The Raman spectra of carbon spherical shells, onions , contained a band at 1572 cm" - the shift of 10 cm" to lower wavenumber compared to graphite was ascribed to the effects of shell curvature. FUR spectra were reported for carbon onions produced by carbon-ion implantation at 500 °C. Two families of bands were identified one due to Ceo and one to C240 species. Therefore these onions comprise concentric spheres of Ceo and C240 fullerenes. Other vibrational studies on carbon nanosystems have also been reported. " ... 

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