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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Low-energy electron scattering by cellulose and hemicellulose components

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Author(s):
de Oliveira, Eliane M. [1] ; da Costa, Romarly F. [2] ; Sanchez, Sergio d'A. [3] ; Natalense, Alexandra P. P. [1] ; Bettega, Marcio H. F. [3] ; Lima, Marco A. P. [1, 4] ; Varella, Marcio T. do N. [5]
Total Authors: 7
Affiliation:
[1] CTBE CNPEM, Lab Nacl Ciencia & Tecnol Bioetanol, BR-13083970 Campinas, SP - Brazil
[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Sao Paulo - Brazil
[3] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, Parana - Brazil
[4] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[5] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Physical Chemistry Chemical Physics; v. 15, n. 5, p. 1682-1689, 2013.
Web of Science Citations: 37
Abstract

We report elastic integral, differential and momentum transfer cross sections for low-energy electron scattering by the cellulose components beta-D-glucose and cellobiose (beta(1 -> 4) linked glucose dimer), and the hemicellulose component beta-D-xylose. For comparison with the b forms, we also obtain results for the amylose subunits alpha-D-glucose and maltose (alpha(1 -> 4) linked glucose dimer). The integral cross sections show double peaked broad structures between 8 eV and 20 eV similar to previously reported results for tetrahydrofuran and 2-deoxyribose, suggesting a general feature of molecules containing furanose and pyranose rings. These broad structures would reflect OH, CO and/or CC sigma{*} resonances, where inspection of low-lying virtual orbitals suggests significant contribution from sigma(OH){*} anion states. Though we do not examine dissociation pathways, these anion states could play a role in dissociative electron attachment mechanisms, in case they were coupled to the long-lived pi{*} anions found in lignin subunits {[}de Oliveira et al., Phys. Rev. A, 2012, 86, 020701(R)]. Altogether, the resonance spectra of lignin, cellulose and hemicellulose components establish a physical-chemical basis for electron-induced biomass pretreatment that could be applied to biofuel production. (AU)

FAPESP's process: 08/58034-0 - Processing of sugarcane cellulose employing atmospheric pressure plasmas
Grantee:Marco Aurelio Pinheiro Lima
Support type: Program for Research on Bioenergy (BIOEN) - Thematic Grants