Nonlinear optical spectroscopic studies of energy transfer in phospholipid bilayer liposomes embedded with porphyrin sensitizers

Article Abstract:

Transient grating kinetics are measured at different temperatures for DMPC phospholipid bilayer liposome aqueous dispersions and 5, 10, 15, 20-Tetrakis-(4-hydroxyphenyl)-21, 23H-porphyrin sensitizers are embedded into the phospholipid bilayers. The value an temperature dependence of K(sub 2) suggest that thermalization in DMPC membrane occurs by thermal diffusion and vibrational energy transfer, but other phospholipid degrees of freedom are not involved in the process.

Science & research, Pharmaceutical Preparation Manufacturing, Pharmaceutical preparations, Biological Product (except Diagnostic) Manufacturing, Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Biological products exc. diagnostic, Liposomes, Porphyrins, Liposome Drug Delivery Systems, Analysis, Energy transfer

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Excited state properties of peridinin: observation of a solvent dependence of the lowest excited singlet state lifetime and spectral behavior unique among carotenoids

Article Abstract:

Steady-state absorption, fluorescence and transient optical spectroscopy have been used to study spectroscopic properties and behavior of peridinin in solvents. The authors report the behavior of peridinin that is unusual for carotenoids .

United States, Australia, Usage, Carotenoids, Spectrum analysis, Spectroscopy, Chemistry, Physical and theoretical, Physical chemistry, Solvents

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