Cholesteryl dimer

Behenyl isostearate Caprylyl methicone Cetearyl behenate Cetearyl candelillate Cholesteryl/behenyl/octyidodecyl lauroyl glutamate Diisopropyl dimer dilinoleate Diisostearyl malate Hexyldecyl benzoate Isostearyl stearoyl stearate Macadamia ternifolia nut oil Methyl stearoxy dimethicone Myristoyl hydrolyzed collagen Myristyl myristate... 

Cholesteryl/behenyl/octyidodecyl lauroyl glutamate Diisopropyl dimer dilinoleate Diisostearoyl trimethylolpropane siloxy silicate... 

Tamaoki and coworkers reported some chiral azobenzenes and diphenylbutadiene-based LC dimers 13-15 exhibiting light-induced phase transition behavior starting from smectic phases [26, 51-55]. For example, dimers 15, which were synthesized by connecting a cholesteryl group with 1,4-diphenylbutadiene unit, were found to experience isothermal phase transition from SmA to N and further to the isotropic state upon UV light irradiation at 366 nm [26]. 

Nakano and Hirata found that the cisoid/transoid ratio of 1 increased from ca. 0.3 to 0.7 with an increase of [ACN] from ca. 7 x 10 to 7 x 10 Min cholesteric LC (cholesteryl oleyl carbonate, cholesteryl hnolate, and cholesteryl oleate), whereas nematic LC or benzene as the reaction medium did not affect the ratio. These results suggest that the cholesteric LC structure makes the ACN molecules align in a phase-to-phase manner. For dimerization of ACN in the nematic phase, Oh-hashi et al. reported briefly the effect of electric fields on the cisoid/transoid ratio. Upon irradiation (X, > 300 nm) of ACN in nematic LC (4-hexyloxyphenyl 4 -butylbenzoate, LCl), application of an electric field up to 5 kV cm decreased the cisoid/transoid ratio from 0.33 to 0.15. They attributed this effect to the preferred formation of the Ti state of ACN by molecular stirring under dynamic scattering of the nematic phase. 

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