fig6
Figure 6. (A) Synthesis of RF resin on SCA-modified chiral SiO2. (B) CD and UV-Vis absorption spectra of 3°P-SiO2@RF (left) and 3°P@RF (right). (C) Molecular structures of R4 and R4F. (D) CD and UV-Vis absorption spectra of 1°P-SiO2@R4F (left) and 1°P@R4F(right). (E) A proposed polycondensation reaction of R with F on the chiral SiO2 surface chemically bonded with amine residues. This figure is used with permission from the Royal Society of Chemistry[47]. SCA: Silane coupling agent; CD: circular dichroism; R: resorcinol; F: formaldehyde.
