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Nonlinear Light Absorption in Porphyrin Derivatives Including the Complexes of the IIIa Metal Group
Author(s) -
Wen T. C.,
Hwang L. C.,
Lin W. Y.
Publication year - 2002
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200200124
Subject(s) - chemistry , absorption (acoustics) , two photon absorption , excited state , saturable absorption , metal , porphyrin , z scan technique , wavelength , ion , photochemistry , nonlinear optical , analytical chemistry (journal) , nonlinear system , atomic physics , optics , organic chemistry , laser , fiber laser , physics , quantum mechanics , fiber
The nonlinear absorption properties of GaClTMPP, InClTMPP and TlClTMPP (TMPP: tetrakis‐(3,4,5‐trimethoxyphenyl)porphyrins) doped in boric acid glass are probed using the Z‐scan technique at different wavelengths. The characteristc of reverse saturable absorption (RSA) is observed at 532 nm, while the two photon absorption (TPA) is dominated at several wavelengths from 840 to 1350 nm. We find that the excited state absorption cross section σ ex at 532 nm is enlarged along a series of the central metal ions: Ga(III)Cl < In(III)Cl < Tl(III)Cl, and the two‐photon allowed transitions at near infrared are proposed to be 1 B * 1 g ← S 0 and 1 B * 2 g ← S 0