A poly(p-phenyleneethynylene) polymer (PC), featuring two π-rich cone-like calixarene 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 (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 C10PCC10 (PCcap), and a polycapsular polymer network assembly PCC10PC (PCnet). The reversibility of the assembly/disassembly processes of PCnet and PCcap upon successive additions of Et3N and TFA were also investigated. AFM analysis of PCnet revealed the formation of a homogeneous continuous network on surface.
|Titolo:||Supramolecular Polymer Networks Based on Calixarene Tethered Poly(p-phenyleneethynylene)|
|Data di pubblicazione:||2012|
|Appare nelle tipologie:||1.1 Articolo in rivista|