Connecting cyclophosphazenes via ring N-centres with covalent linkers

摘要

Two cyclotriphosphazene rings can be covalently linked via ring N-centres by a 2-butene-l,4-diyl unit and vice versa a cyclotriphosphazene molecule is able to bridge two cinnamyl groups via two ring N-centres yielding in either case dicationic assemblies which offers a route to novel polycations.Polyphosphazenes have played an important role in the development of inorganic polymers due to the ease of introducing a wide variety of substituents onto P-centres.Additionally,cyclophosphazenes can be used as building blocks for macromolecular and polymeric species.This is achieved by connecting two or more cyclophosphazene units via P-centres using di-or poly-functional linkers.However,owing to the multitude of potential anchoring sites,linking cyclophosphazenes via P-centres is a rather unselective route.