Polyhedral Oligomeric Silsesquioxane derivatives

Lai et al. (3) prepared reactive polyhedral oligomeric silsesquioxane derivatives,... 

Polyhedral oligomeric silsesquioxane (POSS) has been extensively studied as starting substrate to construct nanocomposites with precise control of nanoarchitecture and properties. Octahedral derivatives are the most representative ones of this family. It was reported that the HRP-catalyzed conjugation of catechin on amine-substituted octahedral silsesquioxane amplified the beneficial physiological property of flavonoids. The POSS-catechin conjugate exhibited great... 

A new chain-extender additive [185, 190] based on the cage-structured silanol derivative epoxycylohexyl polyhedral oligomeric silsesquioxane has been suggested to be a useful additive. 

Other synthetic applications of the phosphazene bases include the use of Bu -Pl (37) in the alkylation of adenine in solution or solid phase, and the catalytic esterification of various glycerol derivatives with fatty methyl esters at room temperature. On occasions, the action of the phosphazene bases may promote processes that other proton abstractors do not, such as the observed rearrangement of (43) to the flavone (44) in the presence of (40e) (OBn = benzoyloxy). Patented process, include the purification " and assembly of polyhedral oligomeric silsesquioxane monomers, and the catalytic activation of silylated nucleophiles. ... 

Polyhedral oligomeric silsesquioxane (POSS) has been extensively studied as starting substrate to construct nanocomposites with precise control of nanoarchitecture and properties. Octahedral derivatives are the most repre-... 

The research route of biomimetic materials is a process that derives from nature but beyond nature ultimately. Scientists first discover the special property of bio-system and give a scientific explanation of the mechanism behind the property. Based on the understanding, researchers mimic the chemical composition and microstructures of the bio-system to recur the desired bio-function. Then abundant artificial fabrication approaches can be used to create new materials that possess better performance or more functionalities than natural materials. McKinley and Cohen et al. synthesized a series of fiuorinated polyhedral oligomeric silsesquioxanes (fiuoroPOSS) that were of very low free energy (Fig. 18.10a). Because pure fiuoroPOSS was not spinnable, they blended the fiuoroPOSS with... 

Figure 20.1 Chemical Structures of Polyhedral Oligomeric Silsesquioxane (POSS) Derivatives.

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