First molecular knots made from just benzene rings
By 
Katrina Krämer2019-07-23T14:31:00
Catenane and trefoil knot are the first mechanically interlocked molecules made from only carbon and hydrogen
In a world-first, chemists have made two catenanes and a trefoil knot from just benzene rings. The three mechanically interlocked structures are the first to contain only carbon and hydrogen but none of the other heteroatoms that are usually needed to make them.