Oligomeric pseudorotaxanes adopting infinite-chain lattice superstructures.
It's just an illusion: Above a critical chain length, where oligomers contain five or more recognition units, apparently infinite donor-acceptor polypseudorotaxanes are formed in the solid state (see picture). X-ray crystallographic analyses of three different examples have shown that although the oligomeric chains are undoubtedly discrete and monodisperse, they nevertheless appear to be infinite in the crystal.
Center for the Chemistry of Integrated Systems, Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
Zhixue
Z
Zhu
Hao
H
Li
Zhichang
Z
Liu
Juying
J
Lei
Huacheng
H
Zhang
Youssry Y
YY
Botros
Charlotte L
CL
Stern
Amy A
AA
Sarjeant
J Fraser
JF
Stoddart
Howard M
HM
Colquhoun