Carbon nanohoops and methods of making
View Patent ↗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.
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.