Raft-like complexes

Despite their apparent similarity, the two complexes have the opposite redox behavior - the iron complex undergoes two reversible one-electron oxidations whereas the osmium complex undergoes two reversible one-electron reductions, Fig. 29. This behavior is reminiscent of that of the isostructural 90-CVE homo-nuclear series [Os6(CO)2i- (PR3) ]. °  

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The brown raft-like complex [ Fe(CO)2Cp 3 p3C3(C=C)3 ]SbF6 (187) is formed from the reaction of [C3Cl3]SbF6 and Fe(C=CSiMe3)(CO))2Cp.354... 

SM is the major phosphosphingolipid in mammalian tissues and lipoproteins, and has been studied extensively with respect to its role in the formation of sterol-enriched ordered membrane domains and cell signaling (J. Slotte, 2006). Like Cers (and most other complex sphingolipids), SMs typically have high phase-transition temperatures (>37°C), which is a factor in their tendency to associate with rafts. 

With the development of controlled radical polymerization techniques like nitroxide-mediated radical polymerization (NMRP), atom transfer radical polymerization (ATRP), and reversible addition fragmentation chain transfer (RAFT) polymerization (see Section 3.2), the field of linear glycopolymers has significantly flourished, especially as control of molar mass and monomer sequence has become available, even for functionalized monomers. This enables incorporation of new and more complex glycomonomers as well as allows controlled dispersity, end group functionality, and monomer sequences in block, star-shaped, and graft copolymers, and eventually... 

The next molecular organisation is more complex. This involves many layers of alternating molecules, intercalated with layers of water—i.e. lamellar phase. It is possible for rafts of these layers to float around in water, but for most real products, they present themselves as fuUy enclosed multi-layered onion-like droplets. The number of layers can nm into hundreds, and these so-called lamellar drops (or vesicles) can be up to several microns in diameter. 

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