Poly (2) catenanes and Cyclic Oligo (2) catenanes Containing Alternating Topological and Covalent Bonds: Synthesis and Characterizaiton

摘要

Large bifunctionalized catenate and catenand, composed of macrocycles containing 45 atoms, have been synthesized and copolymerized with a terephthalic acid derivative to afford a cyclic oligo [2] catenand and a linear poly [2] catenate. Poly [2] catenand was obtained by demetalation of poly [2]catenate. The molecular weight distribution of these polymers, which are composed of alternating topological and covalent bonds, has been characterized by gel permeation chromatography (GPC) with universal calibration, viscometry, and MALDI-TOF mass spectrometry. We were able to synthesize a poly [2] catenate and a poly [2] catenand with a degree of polymerization (DP) equal to 8-9. In addition, an upper value of the Kuhn segment length of poly [2] catenand has been determined and is discussed in the light of its structure.