Solvation dynamics of 4-aminophthalimide in water-in-oil microemulsion of Triton X-100 in mixed solvents

Article Abstract:

Picosecond time-resolved Stokes shift is used in studying solvation of 4-aminophthalimide (4-AP) in water-in-oil microemulsion of Triton X-100 in mixed solvents with 30% benzene and 70% n-hexane. Triton is a neutral surfactant which does not use sodium ions in the solvation of microemulsions. Results show the steady-state spectrum of 4-AP in microemulsion is very different from that in TX reverse micelle or in water. This suggests that 4-AP molecules stay in the water pool and the micropolarity of the water pool is different from ordinary water.

Surface active agents, Solvation, Solvents, Emulsions

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Direct observation of essential DNA dynamics: melting and reformation of the DNA minor groove

Article Abstract:

Time-resolved emission spectra (TRES) of the fluorescent probe H258 is used for characterizing the synthesized dodecamer and a genomic DNA environment at different temperatures along their melting pathway. The results have shown that the dynamics of the environment has included a vital contribution from bound water molecules and cations present in the minor groove of the native DNA.

Biological Product (except Diagnostic) Manufacturing, Drugs, Deoxyribonucleic Acid, Usage, DNA, Chemical synthesis, Emission spectra

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