Sustainable-solvent-induced polymorphism in chitin films
We report a simple route to produce chitin films with different crystalline structures. The use of a green deep-eutectic-solvent (DES) choline chloride : urea (CCU) or hexafluoroisopropanol (HFIP) allows fine-tuning of the crystallization process to produce films with β-dihydrated- or γ-chitin struc...
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| Veröffentlicht in: | Green chemistry : an international journal and green chemistry resource : GC 2016, Vol.18 (15), p.433-4311 |
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| container_title | Green chemistry : an international journal and green chemistry resource : GC |
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| creator | Ramírez-Wong, D. G Ramírez-Cardona, M Sánchez-Leija, R. J Rugerio, A Mauricio-Sánchez, R. A Hernández-Landaverde, M. A Carranza, A Pojman, J. A Garay-Tapia, A. M Prokhorov, E Mota-Morales, J. D Luna-Bárcenas, G |
| description | We report a simple route to produce chitin films with different crystalline structures. The use of a green deep-eutectic-solvent (DES) choline chloride : urea (CCU) or hexafluoroisopropanol (HFIP) allows fine-tuning of the crystallization process to produce films with β-dihydrated- or γ-chitin structures. With the advent of a Grazing-Incidence X-Ray Diffraction (GIXD) technique, we propose a new and fully indexed structure of γ-chitin. This new γ-structure is modeled as a super-cell, in contrast to the idea of a simple physical mixture of α and β phases. The influence of purification, dissolution or dispersion media on chitin's crystallinity was investigated by FTIR, solid-state NMR and XRD. Results presented here may trigger applications in which a well-defined crystalline structure is required.
We report a simple route to produce chitin films with different crystalline structures. |
| doi_str_mv | 10.1039/c6gc00628k |
| format | Article |
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With the advent of a Grazing-Incidence X-Ray Diffraction (GIXD) technique, we propose a new and fully indexed structure of γ-chitin. This new γ-structure is modeled as a super-cell, in contrast to the idea of a simple physical mixture of α and β phases. The influence of purification, dissolution or dispersion media on chitin's crystallinity was investigated by FTIR, solid-state NMR and XRD. Results presented here may trigger applications in which a well-defined crystalline structure is required.
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| ispartof | Green chemistry : an international journal and green chemistry resource : GC, 2016, Vol.18 (15), p.433-4311 |
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| language | eng |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Chitin Chlorides Crystal structure Crystallinity Diffraction Phases Purification Ureas |
| title | Sustainable-solvent-induced polymorphism in chitin films |
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