Janus-type dendrimers

Percec et al. [41,42] studied and reviewed various complex self-assembled structures in detail that can be obtained from dendritic molecules. Especially multicompartment capsules obtained by the self-assembly of a library of amphiphilic Janus-type dendrimers are impressive. The chemical linkage of two dissimilar dendritic building blocks results in Janus dendrimers and produces a break in the spherical symmetry characteristic to dendrimers. Consequently, these stmctures spontaneously promote the self-assembly upon injection of its ethanol solution to form stable unilamellar vesicular nanostructures and other complex architectures (Eig. 6.17). Dendriniersom.es... 

Feng, X., Taton, D., Ibarboure, E. et al. (2008) Janus-type dendrimer-Uke poly(ethylene oxide)s. Journal of the... 

O. Lukin, J. Phys. Chem. B 2007, 6620-6627 for Janus-type polyfethylene oxide) dendrimers see X. Feng, D. Taton,... 

A recent molecular design, Janus liquid-crystalline molecular materials in the form of segmented structures that contain two different types of mesogenic units has recently been reported [108,109]. Janus materials favor different types of mesophase structure, grafted onto the same scaffold, to create giant molecules that contain different hemispheres ( Janus refers to materials with two faces, such as lluorocarbon/hydrocarbon or hydro-philic/hydrophobic, etc., for example Janus amphiphilic dendrimers have been reported [110-114]). 

Most recently. Fan s group [66] readily synthesized a series of chiral diphosphane-functionahzed Janus dendrimers (up to 16 BNIAP units, 39) by using liquid-phase organic synthesis with the third-generation Frechet-type polyether dendron as the soluble support. The ruthenium complexes of these dendritic ligands were... 

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