Primary process of photocarrier generation in Y-form titanyl phthalocyanine studied by electric-field-modulated picosecond time-resolved fluorescence spectroscopy

Article Abstract:

A new explanation is proposed for the primary carrier-generation process in microcrystallites of the titanyl phthalocyanine of the Y-polymorph based on electric-field-modulated, picosecond time-resolved fluorescence spectroscopic data. The shorter lifetime species were assigned to the intramolecular charge transfer exciton while the longer-lifetime species was identified as the neutral Frenkel exciton. Other experimental results are discussed.

Research, Spectra, Porphyrins, Phthalocyanins, Exciton theory, Excitons

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Interface-specific x(super 4) coherent Raman spectroscopy in the frequency domain

Article Abstract:

The interface-specific fourth-order x(super 4) coherent Raman spectroscopy in the frequency domain is demonstrated. The fingerprint vibrational spectrum of R800 at the air/water interface for the wide spectral region from 100 cm (sup -1) to 3600 cm(sup -1) is observed with spectroscopy to indicate that the interface of a few molecular diameter thickness was successfully probed by the frequency-domain x(super 4) spectroscopy.

Usage, Raman spectroscopy, Frequency distributions (Statistics), Coherent states

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Femtosecond/picosecond time-resolved fluorescence study of hydrophilic polymer fine particles

Article Abstract:

Femtosecond/picosecond time-resolved fluorescence is used to study the hydrophilic polymer fine particles (polyacrylamide, PAAm). The calculated viscosity values clearly reveal that there are two different molecular environments around the polyacrylamide fine particles.

Molecular dynamics, Viscosity, Chemical properties, Polyacrylamide

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