A poly(p-phenyleneethynylene) polymer (PC[5]), featuring two π-rich cone-like calix[5]arene cavities (assembling cores) connected to a rigid p-phenyleneethynylene spacer was synthesized by a Pd-catalyzed cross-coupling reaction. NMR investigations provide support for the self-assembly dynamics of PC[5] (homopolytopic host molecule) and complementary 1,10-decanediyldiammonium (C10) guest in solution in the construction of supramolecular polymer networks. Upon variation of the host/guest molar ratio, two distinct types of assemblies were identified in solution: a 1:2 bis-endo-cavity assembly C10PC[5]C10 (PC[5]cap), and a polycapsular polymer network assembly PC[5]C10PC[5] (PC[5]net). The reversibility of the assembly/disassembly processes of PC[5]net and PC[5]cap upon successive additions of Et3N and TFA were also investigated. AFM analysis of PC[5]net revealed the formation of a homogeneous continuous network on surface.

Supramolecular Polymer Networks Based on Calix[5]arene Tethered Poly(p-phenyleneethynylene)

Andrea, Pappalardo;Francesco Paolo, Ballistreri;Giovanni Calogero, Li Destri Nicosia;Placido, Mineo;Gaetano, Tomaselli;Rosa Maria, Toscano;Giuseppe, Trusso Sfrazzetto
2012-01-01

Abstract

A poly(p-phenyleneethynylene) polymer (PC[5]), featuring two π-rich cone-like calix[5]arene cavities (assembling cores) connected to a rigid p-phenyleneethynylene spacer was synthesized by a Pd-catalyzed cross-coupling reaction. NMR investigations provide support for the self-assembly dynamics of PC[5] (homopolytopic host molecule) and complementary 1,10-decanediyldiammonium (C10) guest in solution in the construction of supramolecular polymer networks. Upon variation of the host/guest molar ratio, two distinct types of assemblies were identified in solution: a 1:2 bis-endo-cavity assembly C10PC[5]C10 (PC[5]cap), and a polycapsular polymer network assembly PC[5]C10PC[5] (PC[5]net). The reversibility of the assembly/disassembly processes of PC[5]net and PC[5]cap upon successive additions of Et3N and TFA were also investigated. AFM analysis of PC[5]net revealed the formation of a homogeneous continuous network on surface.
2012
POLYMER NETWORK; SUPRAMOLECULAR; N.M.R.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/12910
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