The differences between acid–base and redox properties of phenolic structures of coniferous and deciduous native lignins
Natural lignins are one of the most widespread biopolymers. The main active centers in the lignin macromolecules are phenolic hydroxyl groups. They form lignin macromolecules reactivity. The lignin is considered as a natural polyphenol. The main characteristics of the lignin reactivity are their acid–base and redox properties. Acid–base properties of lignins are characterized by pKa values of basic types of phenolic structures. The redox properties are characterized by effective oxidation potential and the Gibbs energy of the phenolic structures. This paper studies the acid–base and redox properties of the phenolic structures of coniferous and deciduous natural lignins. The authors analyze the representative slightly altered preparations of dioxane lignin extracted from coniferous wood (spruce, common juniper) and deciduous wood (common aspen). The study reveals the differences in the reaction properties of coniferous and deciduous lignins due to their functional nature and macromolecular properties.
This research was funded by the Federal Agency of Scientific Organizations of Russia under the project agreement No. AAAA-A18-118012390231-9 and the Russian Foundation for Basic Research, project No. 14-03-31551 mol_a. We used the equipment of the “Critical Technologies of Russian Federation in the Field of Environmental Safety of Arctic” Centre of Collective Use of Scientific Equipment (Federal Center for Integrated Arctic Research, Russia) and the instrumentation of the Core Facility Center “Arktika” of Northern (Arctic) Federal University, Russia (unique identifier RFMEFI59417X0013).
- Afanas’ev NI, Fesenko AV, Vishnyakova AP, Chainikov AN (2008) Macromolecular properties and topological structure of spruce dioxane lignin. Polym Sci A 50(2):190–197Google Scholar
- Bogolitsyn KG, Lunin VV et al (2010) Physical chemistry of lignin. Academkniga, MoscowGoogle Scholar
- Brauns PE (1952) The chemistry of lignin. Academic Press, New YorkGoogle Scholar
- Hatakeyama H, Hatakeyama T (2010) Lignin structure, properties, and applications. Adv Polym Sci 232:1–63Google Scholar
- Karmanov AP (2004) Self-organization and structural organization of lignin. UB RAS, EkaterinburgGoogle Scholar
- Kosyakov DS, Panfilova MV, Gorbova NS, Bogolitsyn KG (2013b) Acidity of phenols of syringyl series in binary mixtures of water with 1,4-dioxane and acetonitrile. Chem Chem Technol 56(6):32–37Google Scholar
- Levin ED, Rubchevskaya LP (1980) About the representativeness of samples in the study of the chemical composition of wood. Wood Chem 4:103–106Google Scholar
- Obolenskaya AV, El’nitskaya ZP, Leonovich AL (1991) Laboratory studies of wood and cellulose chemistry. Ecology, MoscowGoogle Scholar
- Samylova OA, Aizenshtadt AM, Bogolitsyn KG, Bogdanov MV, Chukhchin DG, Morozova YuG (2002) Effective potential of coniferous native lignin preparations in aqueous-alkaline medium. For J 6:98–107Google Scholar
- Sarkanen KV, Ludwig CH (1971) Lignins: occurrence, formation, structure and reactions. Wiley, New YorkGoogle Scholar
- Zakis GF (1994) Functional analysis of lignins and their derivatives. GaTAPPI Press, AtlantaGoogle Scholar
- Zubov IN, Khviyuzov SS, Lobanova MA, Gusakova MA, Bogolitsyn KG (2012) Influence of abiotic factors on the formation of carbohydrate matrix of juniper wood. For J 1:113–120Google Scholar