Publications by authors named "Wan Wan Zhao"
Metal-free ultralong organic phosphorescence (UOP) materials have attracted significant attention owing to their anomalous photophysical properties and potential applications in various fields. Here, three pyrimidine-based organic luminogens, 9-(pyrimidin-2-yl)-9H-carbazole, 9-(4,6-dimethylpyrimidin-2-yl)-9H-carbazole, and 9-(5-bromopyrimidin-2-yl)-9H-carbazole are designed and synthesized, which show efficient yellow UOP with the longest lifetimes up to 1.37 s and the highest absolute phosphorescence quantum yields up to 23.
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- The study focuses on red-fleshed papaya to understand how different carotenoids accumulate in its peel and flesh as the fruit ripens, noting that peel color changes from green to yellow and flesh from white to red.
- Major carotenoids found include lutein and β-carotene in the peel, while lycopene dominates in the flesh, which contributes to the flesh’s orange-red color; carotenoid biosynthesis involves 13 key genes that were analyzed for their expression patterns.
- The findings reveal that the carotenoid biosynthetic pathways differ between the yellow peel and red flesh, with the flesh only having a β-branch pathway, while the peel displays multiple pathways.