Telechelic polytetrahydrofuran

Recently in the Sijbesma group, high-molecular-weight linear coordination polymers of diphenylphosphine telechelic polytetrahydrofuran with palladium (II) dichloride were developed [3]. Molecular weights of these polymers could be altered reversibly by ultrasotmd and it has been shown that polytetrahydrofuran chains remain intact during sonication [78]. This implies that only the reversible palladium-phosphorus bonds are broken and coordinatively unsaturated palladium complexes were produced by the application of mechanical forces on these coordination polymers [79]. Furthermore, polymers which include both Pd and Pt were sonicated and it was shown that force selectively breaks the weaker Pd-phosphine bonds which were randomly distributed along the polymer backbone [80]. 

An ABA type TLCE derived from telechelic polytetrahydrofuran and 4-[(4 -alkoxybenzoyl)oxy]benzoyl compound was synthesized, and its phase... 

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