[3]rotaxane synthesized via covalent bond formation can recognize cations forming a sandwich structure.
A novel [3]rotaxane composed of two 25-membered crownophanes and one axle molecule having two anthryl end groups was successfully synthesized via covalent bond formation followed by aminolysis, and can incorporate caesium ion into the space between the two macrocycles as a 1 : 1 sandwich-type complex, whereas it makes a 1 : 2 complex with lithium ion.
Nagawa
Yoshinobu
Y
Nanoarchitectonics Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 4, 1-1-1 Higashi, Tsukuba, 305-8562, Japan. y-nagawa@aist.go.jp
Suga
Jun-ichi
J
Hiratani
Kazuhisa
K
Koyama
Emiko
E
Kanesato
Masatoshi
M