Polyrotaxanes synthetic strategy

Rgure 30 Synthetic strategies for the constmction of side-chain polyrotaxanes. 

Since the synthetic strategies for the preparation of poly[2]catenanes have been developed [14-20,22] only very recently, their properties are just beginning to be investigated. By contrast, the properties of pseudopolyrotaxanes and polyrotaxanes have been studied extensively and are understood in some... 

Figure 24 Synthetic strategy for the construction of sidechain polyrotaxanes.

Since the synthetic strategies for the preparation of poly[2]catenanes have been developed only very recently [101-106,113], their properties are just beginning to be investigated. By contrast, the properties of pseudopolyrotaxanes and polyro-taxanes have been studied extensively and are understood in some considerable detail already. Indeed, it has been established that solubilities, phase transition behavior, hydrodynamic volumes, and the intrinsic viscosities of pseudopolyrotaxanes and polyrotaxanes are significantly different from those of their separate components. Solubilities can either be depressed or enhanced as a result of interlocking. For example, poly(ethylene glycol) and a-CD are soluble [147-159] in H2O. By contrast, the pseudopolyrotaxane formed on threading poly(ethylene... 

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