Polyyne [3]rotaxanes: Synthesis via dicobalt carbonyl complexes and enhanced stability
Keyword(s):
New strategies for synthesizing polyyne polyrotaxanes are being developed as an approach to stable carbyne ‘insulated molecular wires’. Here we report an active metal template route to polyyne [3]rotaxanes, using dicobalt carbonyl masked alkyne equivalents. We synthesized two [3]rotaxanes, both with the same C28 polyyne dumbbell component, one with a phenanthroline-based macrocycle and one using a 2,6-pyridyl cycloparaphenylene nanohoop. The thermal stabilities of the two rotaxanes were compared with that of the naked polyyne dumbbell in decalin at 80 °C, and the nanohoop rotaxane was found to be 4.5 times more stable.
Keyword(s):
1979 ◽
Vol 40
(3)
◽
pp. 309-313
◽
1986 ◽
Vol 47
(C8)
◽
pp. C8-589-C8-592