Herein, we report the synthesis of polyesters via the alternating copolymerization of epoxides and cis-5-norbornene-endo-2,3dicarboxylic anhydride (NB). The polymers are demonstrated to be of perfectly alternating structure with monomodal peak distributions and low polydispersity indexes. We demonstrate that these polyesters can be functionalized using thiol–ene and tetrazine click chemistry to...

A nickel-catalyzed intermolecular [2 + 2] cycloaddition of conjugated enynes with alkenes has been developed. A variety of electron-deficient alkenes as well as electronically neutral norbornene and 1-decene were applicable to this reaction. The use of conjugated enynes circumvented possible side rections, such as oligomerizations and cyclotrimerizations. The isolation of reaction intermediate ...

?,?-Dienes are an important class of monomers due to their utility in the synthesis cyclopolyolefins and reactive polyolefin intermediates. In this contribution, terpolymerization two ?,?-dienes (i.e., 1,5-hexadiene 1,7-octadiene) with ethylene various cyclic olefins [i.e., norbornene (NB), 5-ethylidene-2-norbornene (ENB), dicyclopentadiene (DCPD)] catalyzed by a chelated imido vanadium complex...

The synthesis of polar functionalized cyclic olefin copolymers (COCs) from the coordination copolymerization norbornene (NB) and monomers catalyzed by late transition metal catalysts has been a recent research hotspot. However, few have achieved efficient with commercial vinyl-type monomers, such as methyl acrylate (MA). In this contribution, nickel complexes bearing 2-(diarylphosphino)-N-pheny...

The control of ionic permselectivity in porous films is an interesting aspect in the context of lab-on-chip devices and m-electronics. Especially, visible light triggered ionic permselectivity control is of relevance because control by light can be maintained externally without changing internal system parameters. In addition, light is a sustainable energy source if sunlight is used. Here, we p...

The cross-metathesis of polynorbornene and polyoctenamer in d-chloroform mediated by the 1(st) generation Grubbs' catalyst Cl2(PCy3)2Ru=CHPh is studied by monitoring the kinetics of carbene transformation and evolution of the dyad composition of polymer chains with in situ (1)H and ex situ (13)C NMR spectroscopy. The results are interpreted in terms of a simple kinetic two-stage model. At the f...

The requirements for the self-assembly of 2,3-annulated core-substituted NDIs into discrete worm-like nanostructures are explored in MeOH-CHCl(3) solutions. AFM was used to visualize and characterize the structures formed at precise proportions of solvent mixes.

Density functional theory (DFT) has been used to investigate the α-alkylation of a chiral tricyclic ketone. These calculations reveal that torsional strain and a strong conformational preference, rather than steric influences, are responsible for the high levels of observed stereoselectivity and suggest a way by which alternative stereoisomers could be accessed.