Acetylated Lignins: A Potential Bio‐Sourced Photosensitizer. Issue 20 (28th May 2018)

• Record Type: Journal Article
• Authors: Marchand, Guillaume; Calliste, Claude A.; Williams, René M.; McLure, Charlotte; Leroy‐Lhez, Stéphanie; Villandier, Nicolas
• Is Part Of: ChemistrySelect. Volume 3:Issue 20(2018)
• Page Start: 5512
• Page End: 5516
• Publication Date: 2018-05-28
• Subjects: Acetylated lignins -- EPR spectroscopy -- Photosensitizer -- Singlet oxygen -- Superoxide anion; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201801039
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Nowadays, lignins are receiving an increasing interest from the scientific community. Indeed, this biopolymer, formerly considered a waste‐product of the paper industry, appears today as an interesting oil equivalent in many fields. In this context, many chemical modifications of lignins have been presented to valorize this attractive feedstock. However, spectroscopic properties of these modified materials remain poorly studied, in particular their capacity to produce reactive oxygen species (ROS) under light irradiation. Thus, the purpose of this work is to monitor the production of singlet oxygen and superoxide anion under light irradiation of three different acetylated lignins. The results obtained show that those modified lignins can generate ROS levels, allowing to consider a use of these materials as photosensitizers for applications such as photodynamic treatments. Abstract : New light on lignins: The production of reactive oxygen species under light irradiation by acetylated Kraft and organosolv lignins is reported in this work. The radical generation observed makes it possible to consider this bio‐based polymer as a potential new photosensitizer.