Dendrimers and Polyrotaxanes

The preparation of such polymeric materials can be illustrated as follows [241]  

One paper [242] describes preparation of poly(imidoaryl ether ketone)s and poly(imidoaryl ether sulfone)s that exhibit particularly good heat stability. The synthesis can be illustrated as follows  

One of the fascinating things about polymer chemistiy is the ability of the chemists to develop new and interesting molecular structures. This can result in formation of materials with unique properties. Among such materials are dendrimers and polyrotaxanes. 

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In addition to dendrimers (32, 37) and clusters (33-36, 38, 39), two of the main avenues of pursuit by chemists for multivalent display of carbohydrates are neoglycopolymers (8, 40-43), and dynamic self-assembled systems (44-50) such as liposomes and micelles. Pseudopolyrotaxanes (1-4) and polyrotaxanes (18, 19) incorporate the advantages of both the polymeric and dynamic approaches. 

A polyrotaxane with a dendrimer-like structure is known [60]. Based on the observation that [3-CD and sodium deoxycholate (NaDC) 54 forms a 2 1 host guest complex in water, Tato et al. constructed hyperbranched polyrotaxanes 55 by slowly reacting triply branched receptor 53 containing P-CD and NaDC... 

Further examples of the alternate organic/inorganic adsorption include combinations with cyclodextrin, polyrotaxane, and dendrimer, which play an... 

All of the chapters of the first edition were updated and 11 entirely new chapters added. Four of them focus on novel polymeric structures, specifically dendrimers, polyrotaxanes, foldamers, and supramolecular polymers in general. Another group of chapters covers reinforcing phases in polymers, including carbon black, silica, clays, polyhedral oligomeric silsesquioxanes (POSS), carbon nanotubes, and relevant theories. The final new chapter describes experiments on single polymer chains. 

Type III The metal is part of a polymer chain or network. This type considers homochain or heterochain polymers with covalent bonds to the metal, coordinative bonds between metal ions and a polyfunctional ligand (coordination polymers), Ti-complexes in the main chain with a metal, cofacially stacked polymer metal complexes and different types (polycatenanes, polyrotaxanes, dendrimers with metals) (Figure 3). 

Various types of block copolymers such as ABA triblock [93,94,105,108], ABC triblock [109-111], PNIPAM-dendrimer [112], and PNIPAM-[star-shaped (or hyperbranched) polymer] [65], and PNIPAM-polyrotaxane-PNIPAM [66] have also been designed/synthesized. For example, Armes et al. have synthesized biocompatible, thermoresponsive ABC and ABA triblock copolymers such as PPO-PMPC-PNIPAM via ATRP using a PPO-based macroinitiator. McCormick et al. have reported the RAFT synthesis of thermally responsive ABC triblock copolymers incorporating M-acryl-oxysuccinimide for facile in situ formation of micelles with cross-linked shells. 

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