Abstract
Natural betalain chromophores, extracted from bougainvillea flowers, were stabilised on different surfaces of γ-alumina matrices. This strategy was used to produce a family of hybrid pigments including one yellow and several purple hues. Both textural and structural parameters of γ-alumina were identified as important factors to stabilise the chromophores. Particularly, a high amount of coordinative unsaturated sites of aluminium, high surface specific areas and pore diameters as high as 15 nm are suitable to stabilise the purple chromophores.
Original language | English |
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Pages (from-to) | 161-168 |
Number of pages | 8 |
Journal | Dyes and Pigments |
Volume | 120 |
DOIs | |
State | Published - 1 Sep 2015 |
Keywords
- Adsorption
- Alumina
- Betalain
- Hybrid materials
- Porous
- Purple pigments