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24 October 2017 Structural study of aggregated β-carotene by absorption spectroscopy
Li Ping Lu, Liang Shu Wei
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Proceedings Volume 10461, AOPC 2017: Optical Spectroscopy and Imaging; 1046106 (2017) https://doi.org/10.1117/12.2281444
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
Abstract
By UV-visible absorption spectroscope, the aggregated β-carotene in hydrated ethanol was studied in the temperature range of 5~55°C, with different ethanol/water ratio. And the structural evolutions of these aggregates with time were detected. The spectrophotometric analysis showed that the aggregate of β-carotene formed in 1:1 ethanol/water solution transfered from H-type to J-type with temperature increase. In 2:1 ethanol/water solution a new type of aggregate with strong coupling was predicated by the appearing absorption peak located at about 550 nm. In the time scales of 48 houses all the aggregated structures were stable, but the absorption intensity decreased with time. It was concluded that the types of aggregated β-carotene which wouldn’t change with time depended on the solvent composition and temperature.
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Li Ping Lu and Liang Shu Wei "Structural study of aggregated β-carotene by absorption spectroscopy", Proc. SPIE 10461, AOPC 2017: Optical Spectroscopy and Imaging, 1046106 (24 October 2017); https://doi.org/10.1117/12.2281444
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KEYWORDS
Absorption spectroscopy
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