Náttúrufræðingurinn - 1995, Side 14

aðra sp-kolefna), ekki ósvipað HC(JN sam-
eindinni hér á undan, með allt að 300
atómum (Lagow o.fl. 1995). Knattkol
skipa nú veglegan sess innan efnafræðinn-
ar og ljóst er að ný lönd, eða jafnvel
heimsálfa, hafa verið numin. Mörg stór-
fyrirtæki rannsaka nú knattkol en enn sem
komið er virðast hagnýt not af þeim ekki
vera fyrirsjáanleg (Baum 1993). Þó verður
að hafa í huga að aðeins hafa verið tekin
fyrstu sporin inn í hin nýju lönd og líklegt
er að þrautseigja og hugvit landkönnuða
eigi eftir að skila miklum árangri.
■ HEIMILDIR
Baum, R.M. 1993. Commercial uses of fuller-
enes and derivatives slow to develop. Chem.
Engineer. News. nov. 22, 8-18.
Becker, L., J.L. Bada, R.E. Winans, J.E. Hunt,
T.E. Bunch & B.M. French 1994. Fullerenes
in the 1.85 billion-year-old Sudbury Impact
Structure. Science 265, 642-645.
Bethune, D.S., R.D. Johnson, J.R. Salem, M.S.
de Vires & C.S. Yannoni 1993. Atoms in
carbon cages: the structure and properties of
endohedral fullerenes. Nature 366, 123-128.
Birkett, P.R., P.B. Hitchcock, H.W. Kroto, R.
Taylor & D.R.M. Walton 1992. Preparation
and characterization of C,„Br and C,,1Br„.
Nature 357, 479-481.
Fagan, P.J., Calabrese & B. Malone 1991. A
Multiply-Substituted buckminsterfullerene
(C60) with an Octahedral array of platinum
atoms. J. Am. Chem. Soc. 113, 9408-9409.
Fagan, P.J., B. Chase, Calabrese, D.A. Dixon,
R. Harlow, P.J. Krusic, N. Matsuzawa, F.N.
Tebbe, D.L. Thorn & E. Wasserman 1992.
Some well characterized chemical reactivit-
ies of buckminsterfullerene (CM)). Carbon
30, 1213-1226.
Friedman, S.H., E.L. DeCamp, R.P. Sijbesma,
G. Srdanov, F. Wudl & G.L. Kenyon 1993.
Inhibition of the HlV-1 Protease by
Fullerene Derivatives: Model building Stud-
ies and Experimental Verificaion. J. Am.
Chem. Soc. 115, 6506-6509.
Guo, T., C. Jin & R.E. Smalley 1991. Doping
Bucky: Formation and Properties of Boron-
Doped Buckminsterfullerene. J. Phys.
Chem. 95, 4948-4950.
Haddon, R.C., A.F. Herbard, M.J. Rosseinsky,
D.W. Murphy, S.J. Duclos, K.B. Lyons, B.
Miller, J.M. Rosamilia, R.M. Fleming, A.R.
Kortan, S.H. Glarum, A.V. Makhija, A.J.
Muller, R.H. Eick, S.M. Zahurak, R. Tycko,
G. Dabbagh & F.A. Thiel 1991. Conducting
films of C60 and C70 by alkali-metal doping.
Nature 350, 320-322.
Haddon, R.C. 1992. Electronic Structure, Con-
ductivity and Superconductivity of Alkali
Metal Doped C6Q. Acc. Chem. Res. 25, 127-
133.
Haufler, R.E., J. Conceicao, L.P.F. Chibante,
Y. Chai, N.E. Byrne, S. Flanagan, M.M.
Hale, S.C. O'Brien, C. Pan, Z. Xiao, W.E.
Billups, M.A. Ciufolini, R.H. Hauge, J.L.
Margrave, L.J. Wilson, R.E. Curl & R.E.
Smalley 1990. Efficient Production of C60
(Buckminsterfullerene), C6()H,6, and the
Solvated Buckide Ion. J.Phys. Chem. 94,
8634-8636.
Hawkins, J.M., A. Meyer, T.A. Lewis, S.D.
Loren & F.J. Hollander 1991. Crystal Struc-
ture of Osmylated C6Q: Confirmation of the
Soccer Ball Framework. Science 252, 312-
313.
Heath, J.R., S.C. O'Brien, Q. Zhang, Y. Liu,
R.F. Curl, H.W. Kroto, F.K. Tittel & R.E.
Smalley 1985. Lanthanum complexes of
spheroidal carbon shells. J. Am. Chem. Soc.
107, 7779-7780.
de Heer, W.A. & D. Ugarte 1993. Carbon on-
ions produced by heat treatment of carbon
soot and their relation to the 217.5 nm inter-
stellar absorption feature. Chem. Phys. Lett.
207, 480-486.
Herbard, A.F., M.J. Rosseinsky, R. C. Haddon,
D.W. Murphy, S.H. Glarum, T.T.M. Palstra,
A.P. Ramirez & A.R. Kortan 1991. Super-
conductivity at 18 K in potassium-doped
C,0. Nature 350, 600-601.
60
Heymann, D., L.P.F. Chibante, R.R. Brooks,
W.S. Wolbach & R.E. Smalley 1994.
Fullerenes in the Creataceous-Tertiary
Boundary Layer. Science 265, 645-647.
Holloway, J.H., E.G. Hope, R. Taylor, G.J.
Lagley, A.G. Avent, T.J. Dennis, J.P. Hare,
H. W. Kroto & D.R.M. Walton 1991. Fluori-
nation of Buckminsterfullerene. J. Chem.
Soc., Chem. Commun., 966-969.
Iijima, S. 1991. Helical microtubules of
graphitic carbon. Nature 354, 56-58.
Kratschmer, W., L.D. Lamb, K. Fostiropoulos,
& D.R. Hufmann 1990. Solid Ca new
form of carbon. Nature (London) 347, 354-
358.
Kriitschmer, W. 1994. Interstellar grains and
new forms of carbon: The interaction of two
124