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American Chemical Society, Macromolecules, 18(45), p. 7549-7556, 2012

DOI: 10.1021/ma3015239

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

Journal article published in 2012 by Andrea Pappalardo, Francesco P. Ballistreri, Giovanni Li Destri, Placido G. Mineo, Gaetano A. Tomaselli, Rosa M. Toscano ORCID, Giuseppe Trusso Sfrazzetto, Giuseppe Trusso Sfrazzetto
This paper is available in a repository.
This paper is available in a repository.

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Abstract

A poly(p-phenyleneethynylene) polymer (PC[5]), featuring two pi-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 (C-10) 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 C-10 subset of PC[5]superset of C-10 (PC[5](cap)) and a polycapsular polymer network assembly PC[5]superset of C-10 subset of 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 was also investigated. AFM analysis of PC[5](net) revealed the formation of a homogeneous continuous network on, surface.