Premium
Two‐Photon Absorption and Excited‐State Refractions in Anthraquinone Dyes
Author(s) -
Tiao C. J.,
Hwang L. C.,
Wen T. C.
Publication year - 1998
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.199800100
Subject(s) - anthraquinone , chemistry , anthraquinones , excited state , absorption (acoustics) , two photon absorption , photochemistry , molecule , analytical chemistry (journal) , optics , atomic physics , organic chemistry , physics , laser , botany , biology
We examine the nonlinear optical properties of solutions of 9,10‐anthraquinone, 1,4‐dihydroxy‐anthraquinone, 5,8‐dichloro‐1,4‐dihydroxy‐anthraquinone and 1,4‐bisethylamino‐anthraquinone by means of the intensity‐dependent transmission and the Z‐scan method with 532 nm 8 ns pulses. The results demonstrated that the 9,10‐anthraquinone displayed a two‐photon absorption (TPA) character. The molecular TPA cross section of this compound is estimated as σ 2 = 7.22 × 10 −19 cm 4 /GW or σ 2 = 26.96 × 10 −48 cm 4 /photon/s, respectively, and an essential state of ‘m 1 Ag’, which should be located near the 2ω virtual transition state, is predicted. On the other hand, the effective excited‐state nonlinear refractive coefficients n 2 eff of these anthraquinones are found to be ∼10 −10 esu, which are comparable with those highly conjugated planar molecules of tetrabenzporphyrins and phthalocyanines.