Cholesterol-based gelator

Zinic M, VOgtle F, Fages F (2005) Cholesterol-Based Gelators. 256 39-76 Zipse H (2006) Radical Stability—A Theoretical Perspective. 263 163-190 Zlatuskovd P, see Stibor I (2005) 255 31-63... 

Nakamura and Matsui [71] prepared silica nanotubes as a spin-off product of sol-gel synthesis wherein tetraethylorthosilicate (TEOS) was hydrolyzed in the presence of ammonia and D, L-tartaric acid. Ono et al. [72] showed that certain cholesterol derivatives can gelate tetraethyl orthosilicate (TEOS) to obtain tubular silica structures. Using cholesterol based gelators nanotubes of transition metal (Ti, V and Ta) oxides can also be prepared. The organogelators used in these processes are chiral diamino... 

Zinic M, Viiglle F, Fages F (2005) Cholesterol-Based Gelators. 256 39-76... 

Ono et al. [46] showed that silica coated organic fibers could be obtained when TEOS was polymerized in the presence of a cholesterol-based gelator that contained quaternary ammonium groups. The absence of this functionality did not give the same results, as the cationic groups on the fibrils allowed the ad-... 

Chirality can be induced into the siHca structure by the use of either a cholesterol based gelator with an azacrown moiety in the presence of metal cations [53] or organogels comprised of chiral diaminocyclohexane derivatives [54]. Helical ribbons and double layered nanotubes (diameter 500 nm) composed of titania can also be obtained [55]. 

Sakurai et al. have employed synchrotron SAXS to support a previously proposed model [54] for molecular arrangement in a helical fiber of an azobenzene-cholesterol-based gelator (6) [52a]. A hollow cylinder model exhibited better agreement with the experimental SAXS profile than a solid cylinder model. 

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