Fluorescence from the Twisted Intramolecular Charge Transfer Compound Bis(4,4′-dimethylaminophenyl)sulfone in Ethanol/CO2: A Probe of Local Solvent Composition
作者： Richard D. Schulte , John F. Kauffman
关键词: Analytical chemistry 、 Polar 、 Molecule 、 Fluorescence 、 Intramolecular force 、 Chemistry 、 Solvation 、 Sulfone 、 Solvatochromism 、 Supercritical fluid
摘要: Fluorescence spectra and decays of bis(4,4'-dimethylaminophenyl)sulfone (DMAPS) in mixed ethanol/CO2 supercritical fluid solution have been examined order to evaluate the local solvent polarity solvents. Solvatochromic shifts band intensities determined by nonlinear regression analysis, are compared with observed liquid n-alcohols. The spectral parameters DMAPS solvents used estimate enrichment composition polar modifier, under assumption that increase over calculated for bulk is result augmentation region immediately surrounding solute molecule. analysis indicates enriched a factor five ten composition.
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