Abstract
The J-aggregate of chlorophyll a (Chla) functions as a light-harvesting antenna in natural systems. In this study, we employed the phospholipid membranes composed of longer-chain 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and shorter-chain 1,2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC), as a platform to induce Chla aggregates. The DMPC/DHPC assembly at the mixing ratio (q) = 1.5 induced J-aggregates of Chla at 20 °C with a total lipid concentration of 20 mM. While, Chla aggregates were not observed in the membranes at q = ∞ (DMPC vesicles) and q = 0 (DHPC micelles). The surroundings Chla molecules in DMPC/DHPC at q = 1.5 were estimated to comprise a less polar environment, based on the deconvolution analysis of Soret band spectrum (400–440 nm). The photo-reduction activity of Chla J-aggregates was investigated in lower lipid concentration conditions.
Original language | English |
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Pages (from-to) | 403-408 |
Number of pages | 6 |
Journal | Colloids and Surfaces B: Biointerfaces |
Volume | 175 |
DOIs | |
Publication status | Published - 2019 Mar 1 |
Keywords
- Chlorophyll a
- J-aggregate
- Light-harvesting
- Lipid membrane
- Localization
- Photo-reduction