Bedoukian   RussellIPM   RussellIPM   Piezoelectric Micro-Sprayer


Home
Animal Taxa
Plant Taxa
Semiochemicals
Floral Compounds
Semiochemical Detail
Semiochemicals & Taxa
Synthesis
Control
Invasive spp.
References

Abstract

Guide

Alphascents
Pherobio
InsectScience
E-Econex
Counterpart-Semiochemicals
Print
Email to a Friend
Kindly Donate for The Pherobase

« Previous AbstractAutomated selection of appropriate pheromone representations in ant colony optimization    Next AbstractEffect of putative pheromones on the electrical activity of the human vomeronasal organ and olfactory epithelium »

ACS Omega


Title:Fractionation and DOSY NMR as Analytical Tools: From Model Polymers to a Technical Lignin
Author(s):Montgomery JRD; Lancefield CS; Miles-Barrett DM; Ackermann K; Bode BE; Westwood NJ; Lebl T;
Address:"School of Chemistry and Biomedical Sciences Research Complex, University of St Andrews and EaStChem, North Haugh, St Andrews, Fife KY16 9ST, U.K"
Journal Title:ACS Omega
Year:2017
Volume:20171130
Issue:11
Page Number:8466 - 8474
DOI: 10.1021/acsomega.7b01287
ISSN/ISBN:2470-1343 (Electronic) 2470-1343 (Linking)
Abstract:"One key challenge hindering the valorization of lignin is its structural complexity. Artificial lignin-like materials provide a stepping stone between the simplicity of model compounds and the complexity of lignin. Here, we report an optimized synthesis of an all-G beta-O-4 polymer 1 designed to model softwood lignin. After acetylation, the polymer Ac-1(V) was fractionated using a protocol that involved only volatile organic solvents, which left no insoluble residue. Using diffusion ordered spectroscopy NMR in combination with gel permeation chromatography, it was revealed that this fractionated material behaved like a flexible linear polymer in solution (average alpha > 0.5). Acetylated kraft lignin was subsequently processed using the same fractionation protocol. By comparison with the model polymer, we propose that the acetylated kraft lignin is composed of two classes of materials that exhibit contrasting physical properties. One is comparable to the acetylated all-G beta-O-4 polymer Ac-1, and the second has a significantly different macromolecular structure"
Keywords:
Notes:"PubMed-not-MEDLINEMontgomery, James R D Lancefield, Christopher S Miles-Barrett, Daniel M Ackermann, Katrin Bode, Bela E Westwood, Nicholas J Lebl, Tomas eng 2017/11/30 ACS Omega. 2017 Nov 30; 2(11):8466-8474. doi: 10.1021/acsomega.7b01287. eCollection 2017 Nov 30"

 
Back to top
 
Citation: El-Sayed AM 2024. The Pherobase: Database of Pheromones and Semiochemicals. <http://www.pherobase.com>.
© 2003-2024 The Pherobase - Extensive Database of Pheromones and Semiochemicals. Ashraf M. El-Sayed.
Page created on 12-12-2024