Micropatterning of Metallopolymers: Syntheses of Back-to-Back Coupled Octylated 2,6-Bis(pyrazolyl)pyridine Ligands and Their Solution-Processable Coordination Polymers
摘要:
This paper presents a 10-step synthetic route for the preparation of a series of new back-to-back coupled 2,6-bis(pyrazol-l-yl)pyridine (bpp) ligands (L0-L3) decorated with tetraoctyl chains. Ligand L1 self-assembles with Zn2+ ion to form a highly soluble metallo-supramolecular polymer 1 with M-n similar to 9600 g/mol. To demonstrate the processability of polymer 1, by following a "top-down" approach periodic one-dimensional fluorescent microstripes were fabricated on a silica substrate.
A helical metal-organic framework was prepared by using a conformationallyrigid tetratopic benzoic acid ligand with binding units pointing toward each other (concaveligand). To avoid the obvious intramolecular interactions between binding units, matching spacing groups were applied to introduce atropic repulsion, thereby allowing the formation of extended frameworks for the first time. With this