Effect of Permanent Dipole Moments on the Hypochromism in Helical Polymers

抄録

The theory of hypochromicity in the ordered polymer is revised by taking into account the effect of nonvanishing permanent dipole moment of each component monomer. It is found by numerical calculations on the single stranded helical poly-C and the α-helical polypeptide that the effect contributes a considerable amount to hypochromicity. The ratios of the helix absorption to base absorption are 0.75 and 0.70 respectively in the former and the latter cases, compared to those ratios 0.54 and 0.82 obtained by neglecting the present effect.