Monolayer organizates

Photoinduced Electron Transfer. Monolayer organizates are particularly suited for the investigation of photoinduced electron transfer, since the molecules are fixed and the distance between the planes at which the donor and the acceptor molecules, respectively, are located can be well defined. Therefore, complex monolayers have been arranged in order to study the distance dependence of electron transfer in these systems (2, 20). This strategy has also been used to elucidate the relative contributions of electron injection and energy transfer mechanisms in the spectral sensitization of silver bromide (21). 

Transfer of Photons, Electrons, and Information in Monolayer Organizates... 

Figure 6, top, shows the absorption spectrum of the resulting monolayer organizate measured with linearly polarized light. The electric vector is oscillating in the layer plane parallel ( ) to the direction that coincided originally with the a-axis of the gypsum crystal and perpendicular ( ) to that direction. 

Figure 6. Information transfer in monolayer organizates. Absorption spectra before separation of the dye B copy monolayer from the original dye A monolayer (top), and of the two plates after separation of the monolayers (bottom). Composition of the mixed monolayers (molar ratios) is dye A methylarachidate arachidic acid — 1 9 1 and dye B behenic acid = 1 10. (Reproduced, with permission, from Ref. 25. Copyright 1981, Pergamon Press, Ltd.)...

Recent reports on monomeric and polymerized bolaamphiphiles1 provide evidence for their potential application in the broader field of molecular organizates (1,2). Thus monomeric bolaamphiphiles have been employed in the formation of monolayer lipid membranes or vesicles (1-3). formation of micelles (4-5) and also for spanning bilayer membranes (1-6) The latter process has resulted in the stabilization of membranes. 

L-Fucose has been converted into the liquid crystalline materials methyl 2-O-dodecanoyl-a-L-fucopyranoside, and octyl and dodecyl p-L-fucofiiranosides, the last two being separated from mixtures containing the pyranoside isomers. These compounds represent a novel organizational type of liquid crystalline material, for which the concept "monolayer with frustrated chain end" was suggested. The frustration arises from the presence of the 013(6) group in the hydrophyllic centre of the molecule. ... 

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