Downloads provided by UsageCounts
doi: 10.1002/pola.28029
ABSTRACTHerein we present the synthesis and polycondensation of mono‐ and di‐N‐protected, bis‐substituted tri(benzamide)s with the aim to create large, tubular helices. We synthesized 2,4‐dimethoxy and 2,5‐bis‐TEGylated aminobenzoic acid derivatives as bent and linear monomers and introduced p‐methoxybenzyl (PMB) amide protecting groups to the oligobenzamide backbone. An iterative coupling strategy allowed for sequence control, giving rise to oligomers consisting of one bent and two linear monomers. The resulting meta‐para‐para‐linked aromatic trimers carried either one or two PMB‐protecting groups. With high organosolubility and flexibility, this synthetic strategy generated suitable precursors for subsequent polycondensation reactions. After polymerization, treatment with acid triggered the cleavage of the N‐protecting groups. We hypothesize that the hydrogen bonding pattern generated along the polyaramide backbone could lead to the formation of a helical polymer. A drastic change in hydrodynamic volume was observed by gel permeation chromatography and dissolution in a chiral solvent lead to the observation of a circular dichroism signal for this polymer. The results of the polycondensations of N‐protected oligobenzamides are reported herein. The formation of macrocycles as well as polymers could also be observed, giving a highly interesting insight into the underlying mechanism of the polycondensation of flexible, oligobenzamide‐based oligomers. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 1731–1741
Polymers and Plastics, polyaramides, sequence control, info:eu-repo/classification/udc/54, Organic Chemistry, Materials Chemistry, helices, foldamers, polycondensation
Polymers and Plastics, polyaramides, sequence control, info:eu-repo/classification/udc/54, Organic Chemistry, Materials Chemistry, helices, foldamers, polycondensation
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 9 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
| views | 2 | |
| downloads | 4 |

Views provided by UsageCounts
Downloads provided by UsageCounts