Novel chiral N-propargylphosphonamidate monomers containing phenoxyl

imentholyl groups (1a) and propargyl esters having PEG side chain (1b ~ 3b) with different lengths were synthesized by successive condensation.The single peak in the 31P-NMR spectrum indicated that pure diastereomer (1a) was obtained by using column chromatography on silica gel and then recrystallizing.The corresponding polymers with moderate molecular weights (Mn=1.8104~2.5104) in good yields (42.6%~80.3%) were synthesized by copolymerization of the diastereomer (1a) using (nbd)Rh+［6-C6H5B-(C6H5)3］ as catalyst.The polarimetric

CD and UV-Vis spectroscopic data revealed that polymers existed in a helical form with one-handed screw sense predominantly in CHCl3 solvent.This study further shows that the helical structure was influenceed by internal and external factors .When the molecular weight of b block increases

the intensity of CD becomes higher.It was found that the secondary structure stability of the copolymer was better than homopolymer's in different mixed solvents.When the methanol quantity was up to 50%

the CD spectra changeed into positive and negative parts caused by the accumulation of the polymers .The assembly phenomenon of the Poly (1a -co- 3b) was studied in different solvent systems(CHCl3/CH3OH

THF/H2O) .It is clear from the SEM images of these systems

Poly (1a -co- 3b) can be assembled into spherical shape and rodlike micellae in different solvents.