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Time-resolved Fluorescence Studies of Porphycene Isolated in Low-temperature Gas Matrices by Jacek Dobkowski; Victor Galievsky; Michał Gil; Jacek Waluk is a Physics and Astronomy article available to read on EtoBox.

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Picosecond time-resolved fluorescence (TRF) was used to study excited state deactivation processes of porphycene and 2,7,12,17tetra-t-butylporphycene incorporated in solid argon and nitrogen matrices, and in liquid solutions. For the matrix-isolated samples, excitation of both molecules into the Soret band, located about 11 000 cm À1 above the lowest excited singlet state, results in major spectral evolution of the TRF band on the time scale of 100 ps. No such evolution is detected in the case of low energy excitation (Q bands) as well as for high energy excitation in solution. These experimental facts indicate that heat transport from the cage to the bulk in the case of low temperature matrices consumes about 100 ps, and, consequently, the local transient ÔtemperatureÕ can be much higher than the bulk temperature.

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Author

Jacek Dobkowski; Victor Galievsky; Michał Gil; Jacek Waluk

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-2614)

Published

2004

Language

EN

Field

Physics and Astronomy (Physical Sciences)