Synchronous wavelength scanning room temperature phosphorescence: Comparison of cyclodextrin and micellar media |
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| Affiliation: | 2. Faculty of Science and Technology, Al Neelain University, Khartoum, Sudan;3. Centre of Excellence for Advanced Sciences, National Research Centre (NRC), Dokki, Cairo, Egypt;1. School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;2. Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi''an University of Architecture and Technology, Xi''an 710055, China;3. Shaanxi Key Laboratory of Environmental Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;4. International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Xi''an University of Architecture and Technology, Xi''an 710055, China |
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| Abstract: | ![]()
Application of synchronous wavelength scanning to two fluid phase room temperature phosphorescence (RTP) techniques using β-cyclodextrin and micelles are evaluated and compared. The selectivity, sensitivity, susceptibility to light scattering interference and classes of compounds amenable to determination by the two RTP approaches are discussed. Synchronous wavelength scanning cyclodextrin RTP studies focus on its usefulness for identification of nitrogen heterocyclic phosphors. Spectral resolution is improved in both RTP techniques by second derivative manipulation of the digitally stored synchronous spectra. A significant scatter interference resulting from turbidity produced by the cyclodextrin inclusion complexes imposes constraints on the selectivity and sensitivity achievable with the cyclodextrin medium, especially when using synchronous wavelength scanning. Generally, micelle-induced RTP was found to be superior to cyclodextrin-induced RTP for analysis of various mixtures of the 12 heterocyclics and 15 carbocyclics studied, as well as for a mixture of the drug, propranolol, and its 4-hydroxy metabolite. |
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