‘Click’ functionalised polymer resins: a new approach to the synthesis of surface attached bipyridinium and naphthalene diimide [2]rotaxanes
作者:Hannah Wilson、Sean Byrne、Nick Bampos、Kathleen M. Mullen
DOI:10.1039/c3ob27273g
日期:——
Herein we describe the design and synthesis of a series of solid-tethered [2]rotaxanes utilising crown ether-naphthalene diimide or crown ether-bipyridinium host guest interactions. TentaGel polystyrene resins were initially modified in a two-stage procedure to azide functionalised beads before the target supramolecular architectures were attached using a copper catalysed âclickâ procedure. The final assembly was examined using IR spectroscopy and gel-phase 1H High Resolution Magic Angle Spinning (HR MAS) NMR spectroscopy. The HR MAS technique enabled a direct comparison between the solid-tethered architectures and the synthesis and characterisation of analogous solution-based [2]rotaxanes to be made.
Dynamic covalent synthesis of [2]- and [3]rotaxanes both in solution and on solid supports
作者:Rafael Da Silva Rodrigues、David L. Marshall、John C. McMurtrie、Kathleen M. Mullen
DOI:10.1039/d0nj02137g
日期:——
reported. Our work demonstrates that disulfide exchange can be used to synthesise neutral naphthalene diimide containing rotaxanes. Detailed HPLC analysis enabled deconvolution of a complex equilibrium between 6 disulfide species in solution. Analogous experiments investigating dynamic covalent attachment of rotaxanes to TentaGel™ polymer resins usingdisulfide chemistry resulted in significantly increased