INVESTIGATING POPLAR (POPOLUS NIGRA) LIGNIN 1-USING H NMR SPECTROSCOPY AND CHEMICAL METHODS

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SADEGHIFAR HASAN; MIRSHOKRAEI S.A.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Year:2004 | Volume:9 | Issue:4 Page(s): 71-82

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Information Journal Paper

Title

INVESTIGATING POPLAR (POPOLUS NIGRA) LIGNIN 1-USING H NMR SPECTROSCOPY AND CHEMICAL METHODS

Author(s)

SADEGHIFAR HASAN | MIRSHOKRAEI S.A. | Issue Writer Certificate

Keywords

POPLAR LIGNINQ4

H NMR SPECTROSCOPYQ4

POPLARQ3

CHEMICAL METHODSQ4

Abstract

Lignin of POPLAR wood was investigated using CHEMICAL METHODS and nuclear magnetic resonance (1H NMR) spectroscopy. Klason lignin and acid soluble lignin of this species was determined to be 19% and 3.1% respectively. Carbon, oxygen and hydrogen of purified lignin sample was found to be 63.1%, 31.6% and 5.3%. Methoxyl groups and phenolic and aliphatic hydroxyl groups of lignin was found to be 1.29, 0.45 and 0.92 respectively using 1H NMR spectroscopy. By CHEMICAL METHODS of analysis, these data was found to be 1.25 for methoxyl groups and 1.32 for hydroxyl groups for each phenyl propane unit. The degree of substitution of aromatic hydrogens by C-C and R-5 linkages was determined to be 25%. Therefore, using 1H NMR spectroscopy, the structure of lignin was determined as following:C9Ha1 3.o8Hph 2.02O 1.21 (OH) ph 0.45 (OH) al 0.92 (OCH3) 1.29

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APA: Copy

SADEGHIFAR, HASAN, & MIRSHOKRAEI, S.A.. (2004). INVESTIGATING POPLAR (POPOLUS NIGRA) LIGNIN 1-USING H NMR SPECTROSCOPY AND CHEMICAL METHODS. JOURNAL OF AGRICULTURAL SCIENCES, 9(4), 71-82. SID. https://sid.ir/paper/7901/en

Vancouver: Copy

SADEGHIFAR HASAN, MIRSHOKRAEI S.A.. INVESTIGATING POPLAR (POPOLUS NIGRA) LIGNIN 1-USING H NMR SPECTROSCOPY AND CHEMICAL METHODS. JOURNAL OF AGRICULTURAL SCIENCES[Internet]. 2004;9(4):71-82. Available from: https://sid.ir/paper/7901/en

IEEE: Copy

HASAN SADEGHIFAR, and S.A. MIRSHOKRAEI, “INVESTIGATING POPLAR (POPOLUS NIGRA) LIGNIN 1-USING H NMR SPECTROSCOPY AND CHEMICAL METHODS,” JOURNAL OF AGRICULTURAL SCIENCES, vol. 9, no. 4, pp. 71–82, 2004, [Online]. Available: https://sid.ir/paper/7901/en

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