摘要
Mesoporous 1,4-phenylene-silica nanorings were prepared using cetyltrimethylammonium bromide （CTAB） and （S）-2-methyl-l-butanol as a chiral dopant in concentrated aqueous NH3 solutions. Transmission electron mi- croscopy images of the samples indicated that the nanorings were formed by bending nanorods 360°. With increasing the stirring speed or the （S）-2-methyl-l-butanol/CTAB molar ratio, the morphologies of mesoporous 1,4-phenylene-silicas changed from helical nanofibers to nanorings, and then to nano-saddles. Circular dichroism spectra of these hybrid silicas indicated that they were chiral.
Mesoporous 1,4-phenylene-silica nanorings were prepared using cetyltrimethylammonium bromide （CTAB） and （S）-2-methyl-l-butanol as a chiral dopant in concentrated aqueous NH3 solutions. Transmission electron mi- croscopy images of the samples indicated that the nanorings were formed by bending nanorods 360°. With increasing the stirring speed or the （S）-2-methyl-l-butanol/CTAB molar ratio, the morphologies of mesoporous 1,4-phenylene-silicas changed from helical nanofibers to nanorings, and then to nano-saddles. Circular dichroism spectra of these hybrid silicas indicated that they were chiral.
基金
This work was partially supported by Program ofInnovative Research Team of Soochow University, the Jiangsu Planned Projects for Postdoctoral Research Funds, Program for New Century Excellent Talents in University （No. NCET-08-0698）, and National Natural Science Foundation of China （No. 20871087）.
