Fullerene Complexation

The most recent report of -coordination to a ruthenium porphyrin fragment details the reaction of [Ru(OEP)j2 with C o in benzene/THF (100 1) solution. The UV-visible spectrum of the complex showed a new band at 780 nm, not observed in the spectrum of either Ru(OEP) 2 or C(,o, and H and C NMR data also indicated the presence of a new complex. This has been formulated on the basis of the spectroscopic data as the fullerene complex Ru(OEP)(... 

Fullerene The reaction of 1 with an equimolar amount of fullerene- 60 in toluene at room temperature gives the first fullerene complex of titanium Cp2Ti(q2-C60) 121 [60]. An X-ray diffraction study of this complex has shown that it has the structure of a titanacyclopro-pane derivative, which should have a high potential for further derivatization of the fullerene. 

One particularly striking aspect of endohedral fullerene complexes is the surprising ability of the carbon cage to contain highly reactive species such as atomic nitrogen.1801 N C6o (54) has been prepared... 

Radical polymerization of maleic anhydride and fullerene was used to obtain a new material, the photodynamic properties of which have been studied in vitro and in vivo. HeLa and bone tumor cell growth were inhibited by treatment with fullerene and light, so the polymer was tested on mice affected by bone tumor. After injection and irradiation, tumor size and weight were reduced and the mouse survival time was extended (Jiang and Li, 2007). The photodynamic properties of a supramolecular cucurbit[8]uril-fullerene complex have been studied by the same authors (Jiang and Li, 2006) who attributed HeLa cell death mainly to the damage of membrane phosphohpids and proteins. 

Belgorodsky et al. (2006) studied the binding of pristine fullerene complexed with cyclodextrin on bovine serum albumin protein demonstrating that the binding is a multistep process. First, the cyclodextrin dissociation from C60 takes place, exposing a fullerene hydrophobic portion, than this portion binds to the protein. 

Ikeda A, Ejima A, Nishiguchi K, Kikuchi JI, Matsumoto T, Hatano T, Shinkai S, Goto M (2005) DNA-photocleaving activities of water-soluble carbohydrate-containing nonionic homooxacalix[3]arene [60]fullerene complex. Chem. Lett. 34 308-309. 

Jiang G, Li G (2006) Preparation and biological activity of novel cucurbit[8]uril-fullerene complex. J. Photochem. Photobiol. B 85 223-227. 

Murthy CN, Geckeler KE (2001) The water-soluble beta-cyclodextrin-[60]fullerene complex. Chem. Commun. 1194-1195. 

Rio Y, Nierengarten J-F (2002) Water soluble supramolecular cyclotriveratrylene-[60]fullerene complexes with potential for biological applications. Tetrahedron Lett. 43 4321 4324. 

In accordance with this data the methods of preparation of C60/PVP complexes containing up to 3% of fullerene (Krakovjak et al., 2005b) and water-soluble C60-fullerene complexes with A -vinylcaprolactam homopolymers and copolymers with 0.75-3.3% of C60-fullerene (Krakovjak et al., 2005a) were worked out. 

Krakovjak MG, Anufrieva EV, Anan eva TD, Nekrasova TN (2005a) Water-soluble fullerene complexes with n-vinylcaprolactam homo- and copolymers and a method for preparation of these complexes. Russian patent RU 2 264 415 10.02.2005... 

Fig. 9.12. Partial negative-ion FAB spectrum of y-CD fullerene complexes in magic bullet matrix. Reproduced from Ref. [101] by permission. IM Publications, 1998.

The production of endohedral fullerene complexes in visible amounts was first accomplished by a pulsed laser vaporization of a lanthanum oxide-graphite composite rod in a flow of argon gas at 1200 °C [66]. In this procedure, the newly formed endohedrals, together with empty fullerenes, sublime readily and are carried away in the flowing gas, depositing on the cool surfaces of the apparatus. This sublimate contains the complexes La CgQ, La C74 and La Cg2 (Figure 1.9). Among these, the endohedral molecule La Cg2 exhibits an extra stability. It can... 

Unlike zirconium, the group IV metal titanium does not form the hydrometalation product but rather a (r -C5Q)-complex. The first titanium-fullerene complex 1 was prepared by reaction of the bis(trimethylsilyl)-acetylene complex of titanocene with equimolar amounts of Cjq (Scheme 7.1). 

The possibility of this binding mode was shown recently with the synthesis and structural analysis of the dumbbell-shaped bis-fullerene complexes of molybdenum and timgsten. The X-ray crystal structure proves the (71 -0 0)21 1 binding mode (Figure 7.9) [87]. 

Endohedral Fullerene Complexes, Nanotubes and Other Fullerene-based Supramolecular Systems... 

Occurrence of Fully Characterized Metal-Bound Fullerene Complexes... 

In contrast to the great variety of known organic adducts, there is a relative paucity of metal-containing fullerene complexes. Tables III and IV list (in yearly order of appearance in the literature) all the fully characterized (6, 7) and many of the known [Pg.6]

Fig. 13. The fluxional processes present in some fullerene complexes.

The optical limiting properties of metal cluster compounds and some fullerene complexes have been studied by RSA, with some of the results... 

One of the most remarkable properties of fullerenes is their ability to encapsulate atoms, ions and small molecules, to form the so-called endohedral fullerene complexes, denoted... 

Figure 15.30 X-ray crystal structure of a derivative of the endohedral fullerene complex Sc3N C80 (Sc and N atoms shown as large spheres).51...

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