Conformational
transition due to
steric bulk O
O
n
Poly(trityl methacrylate)
Helical conformation
Bond angle constraint aided by solvophobic effect
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Bond angle constraint aided by electrostatic interactions
Use of chiral acid induces a chiral helix!
Polar oligoethyleneglycol
segment in the periphery
induces folding !
NEt 2
NEt 2
NEt 2
NEt 2
NEt 2
HOOCR
HOOCR
HOOCR
RCOOH
RCOOH
+
+
+
+
+
Fig. 15.1.
Examples of polymers with conformational
restriction due to steric and bond angle constraints.
15 Nanostructured Polymers
482