K. Shinohara et al., DETECTION OF THE SITE OF AN ENANTIOSELECTIVE INTERACTION BETWEEN CHIRAL POLYPINANYLSILANE AND A HYDROPHOBIC ENANTIOMER BY USE OF CIRCULAR-DICHROISM, Chemistry Letters, (4), 1997, pp. 361-362
Since optically active poly(methylpinanylsilane) synthesized by Na-med
iated polycondensation of the corresponding dichlorosilane showed an C
otton effect at the UV region of Si sigma-Si sigma transition of the
main chain in the circular dichroism (CD) spectrum, the main chain was
found to have a chirality. The Cotton bands in the presence of the ()-isomer of a hydrophobic compound were different from those in the pr
esence of the (-)-isomer. Therefore, this polymer was found to have an
ability of the enantioselective recognition. On the other hand, a hyd
rophilic compound did not affect the CD band. These findings indicate
that the recognition was caused mainly by hydrophobic diastereomeric i
nteraction between the chiral compound and the chiral main chain in th
is polymer.