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

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• 作者：Andrea Pappalardo ; Francesco P. Ballistreri ; Giovanni Li Destri ; Placido G. Mineo ; Gaetano A. Tomaselli ; Rosa M. Toscano ; Giuseppe Trusso Sfrazzetto
• 刊名：Macromolecules
• 出版年：2012
• 出版时间：September 25, 2012
• 年：2012
• 卷：45
• 期：18
• 页码：7549-7556
• 全文大小：420K
• 年卷期：v.45,no.18(September 25, 2012)
• ISSN：1520-5835

文摘

A poly(p-phenyleneethynylene) polymer (PC[5]), featuring two 蟺-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<sub>10sub>) 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<sub>10sub>PC[5]C<sub>10sub> (PC[5]<sub>capsub>) and a polycapsular polymer network assembly PC[5]C<sub>10sub>PC[5] (PC[5]<sub>netsub>). The reversibility of the assembly/disassembly processes of PC[5]<sub>netsub> and PC[5]<sub>capsub> upon successive additions of Et<sub>3sub>N and TFA was also investigated. AFM analysis of PC[5]<sub>netsub> revealed the formation of a homogeneous continuous network on surface.