Dendrimeric poly

We have synthesized and tested an example boron-chelating polymer based on a commercially available dendrimeric poly(amido amine) (PAMAM). Dendrimeric chelants offer several advantages over polymers typically used in PAUF. Foremost among these is the reduced viscosity of dendrimer solutions as compared to solutions of linear polymers[6]. This allows the use of higher polymer concentrations than previously feasible (though in the present study we worked at polymer concentrations of less than 5% due to the expense of the starting dendrimer). In this study, the dendrimeric chelant also serves as a convenient, monodisperse polymer with which to test the mathematical model for boron speciation which is derived from the work of Wise and Weber[l],... 

Hetero-coupling polycondenastion of di- and tri-vinylsilicon compounds with organic dienes has permitted the synthesis of dendrimeric poly(silylene-arylene-vinylenes). 

Dendrimeric catalysts can be trapped in poly(p-xylylene) nanotubes to make them reusable [108]. 

Triarylamines attracted considerable interest because of their potential as novel organic electronic materials [113-115]. Hartwig et al. [116] demonstrated tlie potential of P(tBu)3 (26) or DPPF (9) for such applications in the synthesis of dendrimeric triarylamines. Hole-transporting organic materials were synthesized from poly-brominated arenes and diarylamines using only 0.025 mol% of Pd(OAc)2/P(fBu)3 (26) (Scheme 13.68) [117]. 

Simply stated, once a ligand has attached itself to a cell at one site, it suffers a smaller entropy loss by binding at neighboring sites. Mimicry of these biological adhesion parameters can be exquisitely modeled and tested with dendrimeric systems. Although a substantial number of linear, poly (valence) polymeric architectures (e.g., poly [acrylamides], etc.) have been tested with some success, [233-236] efforts toward the use of dendrimer technology to create multivalent ligands for these purposes are in their infancy. 

Figure 1.10 The synthesis of dendrimeric structures with poly(organo)phosphazene side-arms. DAB diaminobutane and PN polyphosphazene. Reproduced with permission from S.Y. Cho and H.R. Allcock, Macromolecules, 2007, 40, 9, 3115. 2007, American Chemical Society [45]...

---