Crystalline Curcumin bioMOF Obtained by Precipitation in Supercritical CO2 and Structural Determination by Electron Diffraction Tomography
| Autor: | José A. Ayllón, Arianna Lanza, Mauro Gemmi, Núria Portolés-Gil, Concepción Domingo, Enrico Mugnaioli, Ana M. López-Periago, Núria Aliaga-Alcalde |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Scanning electron microscope bioMOF curcumin electron diffraction tomography metal-organic frameworks supercritical CO2 Chemistry (all) Environmental Chemistry Chemical Engineering (all) Renewable Energy Sustainability and the Environment General Chemical Engineering Crystal growth 010402 general chemistry 01 natural sciences law.invention law Phase (matter) Renewable Energy Crystallization Sustainability and the Environment 010405 organic chemistry Resolution (electron density) General Chemistry Supercritical fluid 0104 chemical sciences Amorphous solid Electron diffraction Chemical engineering |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 6:12309-12319 |
| ISSN: | 2168-0485 |
| Popis: | This article analyzes the use of supercritical CO2 green technology in the reactive crystallization processes involved in the formation of a bioMOF that contains curcumin and ZnII metal centers. A new phase with a [Zn(curcumin)]n composition, termed sc-CCMOF-1, is presented. The developed scCO2 protocol allows high yields of the small-sized crystalline material, which was characterized by the use of the recently developed electron diffraction tomography method applied to the resolution of submicrometric crystals. A remarkable 3D macrostructure with a complex morphology was obtained. To analyze the crystallization mechanism, multiple identical runs were performed under similar experimental conditions to study in each time period the crystal growth progress ex situ by X-ray diffraction and scanning electron microscopy. These experiments indicated that the process to achieve the sc-CCMOF-1 in a crystalline form involves the formation of amorphous or semicrystalline metastable phases that derived into hierarc... |
| Databáze: | OpenAIRE |
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