Biphasic tautomerization dynamics of excited 7-hydroxyquinolines in reverse micelles

Article Abstract:

The excited state tautomerization dynamics of 7-hydroxyquninoline in the water pools of reverse micelles was investigated by monitoring time-resolved fluorescence spectra and kinetics. The normal and tautomeric species were found to reside preferentially in the bound and free-water regions of the micelles, respectively and the excited-state tautomerization of the normal species in the bound-water layers was suggested to occur via two different channels, depending on rotamers at the moment of excitation.

Quinoline, Quinolines, Micelles, Structure, Hydroxy acids, Tautomers

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Proton transfer of excited 7-azaindole in reverse-micellar methanol nanopools: Even faster than in bulk methanol

Article Abstract:

The methanol-catalyzed double-proton transfer of photoexcited 7-azaindole in the cores of solvation-restricted reverse miscelles takes place on the time scale of 90 ps, which is shorter than in bulk methanol. This anomalous rate increase with a large with a large kinetic isotope effect of five experimentally proves the widely discussed two-step model for the overall reaction of solvent-mediated proton transfer.

Science & research, All Other Basic Organic Chemical Manufacturing, Methanol, Research, Optical properties, Excited state chemistry, Indole, Indoles

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Formation mechanism of anthracene dimers and excimers in NaY zeolite nanocavities

Article Abstract:

A study was conducted to examine the dimer and the excimer formation mechanisms of anthracene in NaY zeolitic nanocavities by using various spectroscopic techniques of 129Xe NMR, diffuse reflectance, and emission as well as time-resolved fluorescence. It was found that the two-anthracene molecules absorb concertedly into a zeolitic supercage to form a ground-state stable dimer.

Cyclic crudes and intermediates, Cyclic Crude and Intermediate Manufacturing, Anthracine, Analysis, Nuclear magnetic resonance spectroscopy, Atomic properties, Anthracene

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