Helix-sense-controlled synthesis of optically active poly(methyl methacrylate) stereocomplexes.
Optically active poly(methyl methacrylate) (PMMA) stereocomplexes were prepared through the helix-sense-controlled supramolecular inclusion of an isotactic (it) PMMA within the helical cavity of an optically active, fullerene-encapsulated syndiotactic (st) PMMA with a macromolecular helicity memory. The observed and calculated vibrational circular dichroism spectra revealed that the it-PMMA replaced the encapsulated fullerenes to fold into a double-stranded helix with the same handedness as that of the st-PMMA single helix through the formation of a topological triple-stranded helix.
Kawauchi
Takehiro
T
Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology, Japan Science & Technology Agency, Japan. kawauchi@tutms.tut.ac.jp
Kitaura
Atsushi
A
Kumaki
Jiro
J
Kusanagi
Hiroshi
H
Yashima
Eiji
E