Journal
CHEMICAL PHYSICS LETTERS
Volume 355, Issue 1-2, Pages 175-182Publisher
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DOI: 10.1016/S0009-2614(02)00206-3
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Two-photon absorption spectra in absolute cross-section values are presented for a number of octaethyl-, tetraphenyl-. and tetrabenzo-substituted porphyrins. In excitation spectral region of 710-810 nm, the two-photon absorption efficiency is resonantly enhanced due to nearby Q(0-0) one-photon transition. The cross-section value calculated directly from the ground- and excited-state absorption parameters in a single intermediate level approximation, agrees well with that measured in experiment. (C) 2002 Elsevier Science B.V. All rights reserved.
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