Synthesis of a multicyclic polymer with hyperbranched structure by click polymerization of an AB₂ cyclic macromonomer

Abstract

A multicyclic polymer with a hyperbranched structure was successfully synthesized.

Efficient Synthesis and Cyclic Molecular Topology of Ultralarge-Sized Bicyclic and Tetracyclic Polymers

“…Multicyclic polymers have emerged as one of the most promising classes of cyclic polymers because of their complex structures and some uncertain properties. − A tetracyclic polymer c -{ PTNBP 5 -[( b - PTNP 80 ) 4 -( b - PBNP 5 ) 2 ] 2 } was also prepared by successive ROMP via the further alternating addition of monofunctional TNP and difunctional BNP from bicyclic c -[ PTNBP 5 -( b - PTNP 80 ) 4 -( b - PBNP 5 ) 2 ] with four living chain ends (Scheme S5), benefiting from the diversified blocking-cyclization technique and tetrafunctional TNBP . From the 1 H NMR spectra (Figure S28), the actual ratios of [ PTNBP ]/[ PTNP ]/[ PBNP ] were calculated to be 5:616:20 and 5:600:20 for tetracyclic c -{ PTNBP 5 -[( b - PTNP 80 ) 4 -( b - PBNP 5 ) 2 ] 2 } and its four-arm counterpart a - PTNBP 5 -( b - PBNP 10 ) 2 -( b - PTNP 160 ) 4 (entries 15 and 16, Table ), respectively.…”

From luminescent π-conjugated macrocycles to bridged multi-cyclic π-conjugated polymers: cyclic topology, aggregation-induced emission, and explosive sensing

“…Multicyclic polymers reported until now are mostly limited to flexible and non-conjugated polymers, 16 whereas multicyclic π-conjugated polymers featuring a rigid and persistent multicyclic topology have been rarely studied. 17 The impacts of topology complexity on the optoelectronic properties of these multicyclic conjugated polymers still remain elusive. Spurred by the flourishing applications of conjugated polymers in diverse fields, 18 extensive exploration of the architecture of conjugated polymers has been screened on the level of different topology 19 and structural dimensions.…”

Nickel-Catalyzed Azide–Alkyne Click Polymerization toward 1,5-Regioregular Polytriazoles

“…A turnaround took place in 2002 when the Cu­(I)-catalyzed azide–alkyne cycloaddition (CuAAC) was reported independently by Sharpless et al and Meldal et al , As a typical click reaction, CuAAC could produce sole 1,4-disubstituted 1,2,3-triazoles in excellent yields under mild conditions, which has been developed into a useful polymerization technique, i.e., Cu­(I)-catalyzed azide–alkyne click polymerization (CuAACP) . Thanks to its remarkable click features, CuAACP has been widely used for the preparation of 1,4-regioregular polytriazoles (PTAs) with advanced structures and desired functional properties, which could serve as biomaterials, photoelectric materials, nonlinear optical materials, shape memory materials, self-healing materials, − and so on. To avoid the detriment of the residue metallic species to the optoelectronic and bioapplication of the product, metal-free click polymerization (MFCP) of azides and alkynes was also reported by our groups for the preparation of 1,4-regioregular PTAs …”