Study on the resonance Raman scattering properties of beta-carotene incorporated into SBA-15.
In this study, beta-carotene, a resonance Raman active substance, was introduced into the large pore channel of rod-like SBA-15 for the first time. This novel resonance Raman active material has been characterized by small angle X-ray scattering (SAXS) and Brunauer-Emmett-Teller (BET) surface area analysis. The adsorption process did not show any influence on the microstructure of SBA-15 as well as its physicochemical characters. Excited by 514.5 nm laser, the resonance Raman signals of the products were demonstrated as well-defined Raman peaks at 1009, 1158 and 1514 cm(-1), which should be assigned to the methyl rock (C-CH(3)), carbon single-bond stretch (C-C) and carbon double-bond stretch (C=C) normal modes, respectively. In addition, the internal standard method was utilized by resonance Raman spectroscopy to determine the adsorption capacity of mesoporous silicas for beta-carotene using the results of UV-vis spectroscopy as a reference.
Tan
Shishi
S
Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.
Zhang
Guannan
G
Shen
Aiguo
A
Hu
Juncheng
J
Hu
Jiming
J
D000327:Adsorption; D053838:Scattering, Small Angle; D012822:Silicon Dioxide / Q000138:chemical synthesis / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D019207:beta Carotene / Q000737:chemistry*
C509969:SBA-15; D019207:beta Carotene; D012822:Silicon Dioxide