24-01-2013, 03:16 PM
FULLERENE
[attachment=48331]
Any molecule which is entirely made up of several carbon compounds and have ellipsoidal, spherical or tube shape can be called as Fullerene.
TIMELINE
----In 1970: C60 was first predicted was Eiji Osawa at Toyosaki University of Technology.In the same year, R.H.Weston made a probable model of Fullerene but results never published.
----In 1973: Prof Bovchar done the quantum-chemical analysis on the stability of Fullerene.
----In 1980: Curl, Smalley and Kroto discovered the first Fullerene, C60.
----In 1996: They got the Nobel prize for their discovery.
TYPES
Buckyballs-
C20 is the smallest member and C60 is the largest one.
Occurrence- Very common in occurrence.
Structure- Truncated icosahedrous structure. Resembles the shape of a football. Has 12 pentagons and 20 hexagons and the edges of pentagons do not touch there edges. Van der Wall diameter of each molecule is 1.1nm.and nucleus to nucleus to 0.71nm. Has 6:6 ring bonds between hexagons and 6:5 between hexagon and pentagon. The average bond length is 1.4 angstrom.
Also, we have B80 types and C’s up to 100(C100) .The structure follows the Euler’s formulae V-E+F=2, V is the number of vertices, E is the number of edges, and F is the number of faces. In graph theory, it refers to the 3 regular planar graph.
NANOTUBES-
Structure- Few nanometers in size but vary in size from few micrometers to several millimeters. The fusing of the end by diameter is also possible.
Features- High tensile strength, have good ductility, high heat and tensile resistance, and chemical inactivity. Scope-Have good scope in Material Technology.
FULLERITES
The solid state manifestation of the Fullerene is Fullerite. Produced by high temperature and high pressure process. Also called Ultra hard Fullerene.
[attachment=48331]
Any molecule which is entirely made up of several carbon compounds and have ellipsoidal, spherical or tube shape can be called as Fullerene.
TIMELINE
----In 1970: C60 was first predicted was Eiji Osawa at Toyosaki University of Technology.In the same year, R.H.Weston made a probable model of Fullerene but results never published.
----In 1973: Prof Bovchar done the quantum-chemical analysis on the stability of Fullerene.
----In 1980: Curl, Smalley and Kroto discovered the first Fullerene, C60.
----In 1996: They got the Nobel prize for their discovery.
TYPES
Buckyballs-
C20 is the smallest member and C60 is the largest one.
Occurrence- Very common in occurrence.
Structure- Truncated icosahedrous structure. Resembles the shape of a football. Has 12 pentagons and 20 hexagons and the edges of pentagons do not touch there edges. Van der Wall diameter of each molecule is 1.1nm.and nucleus to nucleus to 0.71nm. Has 6:6 ring bonds between hexagons and 6:5 between hexagon and pentagon. The average bond length is 1.4 angstrom.
Also, we have B80 types and C’s up to 100(C100) .The structure follows the Euler’s formulae V-E+F=2, V is the number of vertices, E is the number of edges, and F is the number of faces. In graph theory, it refers to the 3 regular planar graph.
NANOTUBES-
Structure- Few nanometers in size but vary in size from few micrometers to several millimeters. The fusing of the end by diameter is also possible.
Features- High tensile strength, have good ductility, high heat and tensile resistance, and chemical inactivity. Scope-Have good scope in Material Technology.
FULLERITES
The solid state manifestation of the Fullerene is Fullerite. Produced by high temperature and high pressure process. Also called Ultra hard Fullerene.