IP Library › Granted Patent US 8,461,403
Granted Patent B2
US 8,461,403 · App. 12/955,211 · Granted Jun 11, 2013

Carbon nanohoops and methods of making

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Quick Facts
Patent No.
US 8,461,403
App. No.
12/955,211
Granted
Jun 11, 2013
Kind
B2
Abstract

The present invention provides cycloparaphenylene compounds, their macrocyclic precursors, and methods for making the compounds. The cycloparaphenylene compounds can be used to prepare armchair carbon nanotubes.

Claims (13)

1. A compound of formula I:

wherein

each R is independently selected from the group consisting of hydrogen, C 1-6 alkyl, C 3-8 cycloalkyl and aryl;

alternatively, two R groups on adjacent carbons can be combined with the atoms to which each is attached to form a member selected from the group consisting of a C 5-8 cycloalkyl and an aryl; and

subscript n is an integer from 6 to 30.

2. The compound of claim 1 , wherein subscript n is selected from the group consisting of 6, 9, 12, 15, 18, 21, 24, 27 and 30.

3. The compound of claim 1 , wherein subscript n is selected from the group consisting of 9, 12 and 18.

4. The compound of claim 1 , wherein each R is hydrogen.

5. The compound of claim 1 , wherein

each R is hydrogen; and

subscript n is selected from the group consisting of 9, 12 and 18.

6. The compound of claim 1 , wherein subscript n is an integer from 9 to 30.

7. The compound of claim 1 , wherein subscript n is selected from the group consisting of 9, 12, 15, 18, 21, 24, 27 and 30.