Sustainable aromatic polyesters with 1,5-disubstituted indole units

Abstract

1,5-disubstituted indole was investigated as new sustainable aromatic units for polyesters to enhance thermal stability.

Marine PET Hydrolase (PET2): Assessment of Terephthalate- and Indole-Based Polyester Depolymerization

“…It makes indole a potentially attractive aromatic building block for developing sustainable polymers. So far, several series of indole-based polyesters with different structures (e.g., flexibility, substitution patterns, type of ester bonds, and others) have been successfully synthesized, and their possibility to be degraded by enzymes has also been preliminarily demonstrated [31][32][33][34]. This article focuses on fundamental depolymerization studies and not directly on recycling.…”

Nonionic nontoxic antimicrobial polymers: indole-grafted poly(vinyl alcohol) with pendant alkyl or ether groups

“…Indole is a bio-sourced nonionic building block that is ubiquitous in nature and domestic wastes, 56,57 and it has received growing attention for the development of bio-based polymers toward various high performance packaging and textile applications. [58][59][60][61] In the meantime, many indole derivatives are natural antibiotics, 31,62,63 and several indole-based polyesters, polyketones and polyurethanes have been reported with antibacterial effects. 44,64,65 Indole groups can also have a synergistic antibacterial effect when grafted on polymers together with other antibacterial moieties (e.g.…”

“…Indole is a bio-sourced nonionic building block that is ubiquitous in nature and domestic wastes, 56,57 and it has received growing attention for the development of bio-based polymers toward various high performance packaging and textile applications. [58][59][60][61] In the meantime, many indole derivatives are natural antibiotics, 31,62,63 and several indole-based polyesters, polyketones and polyurethanes have been reported with antibacterial effects. 44,64,65 Indole groups can also have a synergistic antibacterial effect when grafted on polymers † Electronic supplementary information (ESI) available: Synthesis scheme of grafting agents 2-6; analytical data of grafting agents 1-6 ( 1 H NMR and 13 C NMR spectra); zoomed-in 1 H NMR spectra of PVA; calculations of OH conversion of PI1-6; analytical data of PI1-6 (solubility data, 13 C NMR, GPC and UV-vis spectra); WAXD spectra of PVA and PI1-6; inhibition zones of PI1-6; p values of the antimicrobial results; analytical data of PI4 54 , PI4 72 and PI4 85 ( 1 H NMR spectra and GPC spectra); plates of disk diffusion tests and anti-QS tests of PI4 54 , PI4 72 and PI4 85 ; UV absorbance at 600 nm of PI1 in MTT assay.…”