Interlocked Molecules

Catenane 
for each ring, light color = C, dark color = N/O, H not shown
Angew. Chem. Int. Ed. 28, 1396 (1989)

Molecular Solomon Link 
yellow = Zn, orange = Cu, for each ring, light color = C, dark color = N/O, H not shown
Angew. Chem. Int. Ed. 46, 218 (2007)

Molecular Borromean Rings 
yellow = Zn, for each ring, light color = C, dark color = N/O, H not shown
Science 304, 1308 (2004)

interlocked_04.jpg

Molecular Pentafoil Knot 
yellow = Fe, for each part, light color = C, dark color = N/O, H not shown
Nature Chem. 4, 15 (2011)

interlocked_05.jpg

Molecular Trefoil Knot 
yellow = S, for each part, light color = C, dark color = N/O, H not shown
Science 338, 783 (2012)