Organosilane amphiphile

Fig. J Chemical structures of the organosilane amphiphile and vitamin B12 derivative.

The concept of the hybrid electrode was extended to a vitamin-immobilized system by Hisaeda and co-workers (Fig. 5), in which heptapropyl and heptaoctyl esters of vitamin B12 derivatives with a Co(II) or Co(III) center were used. Investigation of ti-A isotherms of these compounds with the alkoxysilane monolayers suggested that stable accommodation of the vitamin functionality in the lipid monolayer can be achieved by the introduction of long chains at the vitamin B core. The mixed monolayers of the long chain-substituted vitamin B12 and organosilane amphiphile were transferred as an x-type LB film onto a quartz plate and showed reasonable UV absorbance. Monolayers similarly immobilized on an indium-tin-oxide (ITO) electrode possessed a... 

Figure 9.1 Examples of nanoporous materials illustrated by electron microscopy images (a) SEM image of amphiphilic organosilane-diiected mesoporous zeolite crystals (LTA). (Reproduced with permission from M. Choi et al., Nature Mater. 2006, 5, 718. Copyright 2006 Nature Publishing Group.) (b) ZSM-5 zeolite synthesized with carbon black as a porogen...

Choi M, Cho HS, Srivastava R, Venkatesan C, Choi D-H, Ryoo R. Amphiphilic organosilane-directed synthesis of crystalline zeolite with tunable mesoporosity. Nat Mater 2006 5 718-23. 

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