Premium
Supramolecular Helical Structure of the Stereocomplex Composed of Complementary Isotactic and Syndiotactic Poly(methyl methacrylate)s as Revealed by Atomic Force Microscopy
Author(s) -
Kumaki Jiro,
Kawauchi Takehiro,
Okoshi Kento,
Kusanagi Hiroshi,
Yashima Eiji
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200700455
Subject(s) - tacticity , atomic force microscopy , supramolecular chemistry , polymer , materials science , poly(methyl methacrylate) , methyl methacrylate , helix (gastropod) , crystallography , triple helix , polymer chemistry , crystal structure , nanotechnology , chemistry , stereochemistry , composite material , polymerization , ecology , snail , biology
A long‐standing question in polymer chemistry has been addressed by AFM, which revealed the helical conformation, handedness, and helical pitch (0.92 nm) of the title stereocomplex formed from a 1:2 mixture of the named polymers ( it ‐ and st ‐PMMA). The results provide convincing evidence for a triple‐stranded helix (see structure against a background of the AFM image) as a plausible model for the stereocomplex.