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Preparation of Mesoporous 1,4‐Phenylene‐silica Nanorings through a Dual‐templating Approach
Author(s) -
Zhu Weike,
Li Baozong,
Bi Lifeng,
Wang Sibing,
Zhuang Wei,
Li Yi,
Yang Yonggang
Publication year - 2012
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201180464
Subject(s) - chemistry , mesoporous material , nanorod , phenylene , bromide , transmission electron microscopy , chemical engineering , aqueous solution , mesoporous silica , microemulsion , dopant , nanotechnology , crystallography , organic chemistry , catalysis , pulmonary surfactant , materials science , polymer , doping , biochemistry , optoelectronics , engineering
Mesoporous 1,4‐phenylene‐silica nanorings were prepared using cetyltrimethylammonium bromide (CTAB) and ( S )‐2‐methyl‐1‐butanol as a chiral dopant in concentrated aqueous NH 3 solutions. Transmission electron microscopy images of the samples indicated that the nanorings were formed by bending nanorods 360°. With increasing the stirring speed or the ( S )‐2‐methyl‐1‐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.