H. Ihara et al., DETECTION OF MOLECULAR-SHAPE RECOGNITION FOR POLYCYCLIC AROMATIC-HYDROCARBONS BY ALPHA-HELICAL POLY(L-ALANINE) ON SILICA, Chemistry Letters, (10), 1998, pp. 963-964
alpha-Helical poly(L-alanine) grafted onto porous silica particles wit
h a reactive terminal trimethoxysilyl group showed a specific shape-se
lective retention for polycyclic aromatic hydrocarbons, recognizing th
eir molecular linearities and slenderness. This selectivity is derived
from the carbonyl groups on the rigid secondary structure and thus th
e poly(L-leucine) derivative having bulky residual groups showed almos
t no similar selectivity.