Molecular Carbon Data of Cyclohexane Extract from Eucalyptus urophylla S. T. Blacke Wood Through NMR ¹³C

ABSTRACT

The knowledge of the chemical composition of wood enables the understanding of its behavior as raw material for various uses, mainly in the pulp, wood panel and pharmacy industries, besides the fact that it confers preservative activity against biotic and abiotic agents. Within the Eucalyptus genus, the Eucalyptus urophylla presents the highest growth potentiality in relation to the planted area and in function of the resistance to Cryphonectria cubensis fungi, as promoters of eucalypts diseases. The objective of this research was to analyze the possibility to propose a systematic identification model for Eucalyptus genus wood through ¹³C Nuclear Magnetic Resonance (NMR ¹³C). Cyclohexane extracts from wood clones of E. urophylla were used due to the differences in chemical displacement of the molecular carbons. The study is also being carried out with other species of the Eucalyptus genus. The results of the NMR ¹³C showed that the cyclohexane extracts spectra of heartwood were considered the most representative for the study in the E. urophylla clones, due to the largest number of existing spectrum signals. With these results, it was possible to identify a common spectral profile for each region of wood (sapwood, transition zone and heartwood) of E. urophylla species.

Keywords:
identification; heartwood; NMR.