Analysis of Photodegraded Lignin and Lignin Model Compounds by ATR-FTIR Spectroscopy

In this study, optical behavior of methylated and unmethylated Bjorkman lignin from poplar wood and two lignin model compound (phenolic and non phenolic) with β-O-4 linkages was investigated. First, these lignins were precipitated on a cellulosic matrix (Whatman Paper) using different times (0, 5, 1...

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Autores principales:	Ahmad Mirshkraee, Jalil Lari, Fatemeh Mstaghni, Ali Abdolkhani
Formato:	article
Lenguaje:	FA
Publicado:	Regional Information Center for Science and Technology (RICeST) 2014
Materias:	Bjorkman β-O-4 Lignin model compounds Photodegradation ATR-FTIR spectroscopy Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/91294e05eab84c0382ae924f71302a16
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spelling	oai:doaj.org-article:91294e05eab84c0382ae924f71302a162021-12-02T05:05:37ZAnalysis of Photodegraded Lignin and Lignin Model Compounds by ATR-FTIR Spectroscopy1735-09132383-112X10.22092/ijwpr.2014.6185https://doaj.org/article/91294e05eab84c0382ae924f71302a162014-09-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_6185_1cea5a8a23daddd8448eb24ceef47e1e.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XIn this study, optical behavior of methylated and unmethylated Bjorkman lignin from poplar wood and two lignin model compound (phenolic and non phenolic) with β-O-4 linkages was investigated. First, these lignins were precipitated on a cellulosic matrix (Whatman Paper) using different times (0, 5, 10, 15, 20 h) and then matrixcovered surface was analyzed using Attenuated Total Reflectance FTIR technique. The results showed that irradiation altered the chemical structure of all samples. Lignin was the most sensitive component to photodegradation and the intensities of its characteristic bands decreased significantly during the process of irradiation. This was accompanied by formation of new carbonyl groups appearing at 1735 cm_1. Compared with the unmethylated forms, the rate of lignin degradation and carbonyl formation was relatively lower in methylated forms. In other words, methylation of phenolic hydroxyl group reduced the chemical changes induced by irradiation.Ahmad MirshkraeeJalil LariFatemeh MstaghniAli AbdolkhaniRegional Information Center for Science and Technology (RICeST)articleBjorkmanβ-O-4 Lignin model compoundsPhotodegradationATR-FTIR spectroscopyForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 29, Iss 3, Pp 343-353 (2014)
institution	DOAJ
collection	DOAJ
language	FA
topic	Bjorkman β-O-4 Lignin model compounds Photodegradation ATR-FTIR spectroscopy Forestry SD1-669.5
spellingShingle	Bjorkman β-O-4 Lignin model compounds Photodegradation ATR-FTIR spectroscopy Forestry SD1-669.5 Ahmad Mirshkraee Jalil Lari Fatemeh Mstaghni Ali Abdolkhani Analysis of Photodegraded Lignin and Lignin Model Compounds by ATR-FTIR Spectroscopy
description	In this study, optical behavior of methylated and unmethylated Bjorkman lignin from poplar wood and two lignin model compound (phenolic and non phenolic) with β-O-4 linkages was investigated. First, these lignins were precipitated on a cellulosic matrix (Whatman Paper) using different times (0, 5, 10, 15, 20 h) and then matrixcovered surface was analyzed using Attenuated Total Reflectance FTIR technique. The results showed that irradiation altered the chemical structure of all samples. Lignin was the most sensitive component to photodegradation and the intensities of its characteristic bands decreased significantly during the process of irradiation. This was accompanied by formation of new carbonyl groups appearing at 1735 cm_1. Compared with the unmethylated forms, the rate of lignin degradation and carbonyl formation was relatively lower in methylated forms. In other words, methylation of phenolic hydroxyl group reduced the chemical changes induced by irradiation.
format	article
author	Ahmad Mirshkraee Jalil Lari Fatemeh Mstaghni Ali Abdolkhani
author_facet	Ahmad Mirshkraee Jalil Lari Fatemeh Mstaghni Ali Abdolkhani
author_sort	Ahmad Mirshkraee
title	Analysis of Photodegraded Lignin and Lignin Model Compounds by ATR-FTIR Spectroscopy
title_short	Analysis of Photodegraded Lignin and Lignin Model Compounds by ATR-FTIR Spectroscopy
title_full	Analysis of Photodegraded Lignin and Lignin Model Compounds by ATR-FTIR Spectroscopy
title_fullStr	Analysis of Photodegraded Lignin and Lignin Model Compounds by ATR-FTIR Spectroscopy
title_full_unstemmed	Analysis of Photodegraded Lignin and Lignin Model Compounds by ATR-FTIR Spectroscopy
title_sort	analysis of photodegraded lignin and lignin model compounds by atr-ftir spectroscopy
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	2014
url	https://doaj.org/article/91294e05eab84c0382ae924f71302a16
work_keys_str_mv	AT ahmadmirshkraee analysisofphotodegradedligninandligninmodelcompoundsbyatrftirspectroscopy AT jalillari analysisofphotodegradedligninandligninmodelcompoundsbyatrftirspectroscopy AT fatemehmstaghni analysisofphotodegradedligninandligninmodelcompoundsbyatrftirspectroscopy AT aliabdolkhani analysisofphotodegradedligninandligninmodelcompoundsbyatrftirspectroscopy
_version_	1718400605417897984

Analysis of Photodegraded Lignin and Lignin Model Compounds by ATR-FTIR Spectroscopy

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