Uncovering coherent domain structure in a series of pi-conjugated dendrimers by simultaneous three-photon absorption

Drobizhev, M.; Karotki, A.; Kruk, M.; Dzenis, Y.; Rebane, A.; Suo, Z.; Spangler, C. W. (2004). Uncovering coherent domain structure in a series of pi-conjugated dendrimers by simultaneous three-photon absorption. The Journal of Physical Chemistry B, 108 (14), 4221-4226.
ajakirjaartikkel
Drobizhev, M.; Karotki, A.; Kruk, M.; Dzenis, Y.; Rebane, A.; Suo, Z.; Spangler, C. W.
The Journal of Physical Chemistry B
1520-6106
108
14
2004
4221-4226
Ilmunud
1.1. Teadusartiklid, mis on kajastatud Web of Science andmebaasides Science Citation Index Expanded, Social Sciences Citation Index, Arts & Humanities Citation Index ja/või andmebaasis Scopus (v.a. kogumikud)
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English, We study three-photon absorption (3PA) in a series of 4,4'-bis(diphenylamino) stilbene-based dendrimers and show that the cross section of the nonlinear absorption scales faster than in a linear fashion with the molecular size, which is a manifestation of the cooperative enhancement effect. The coherent domain structure is deduced from 3PA cross section values for all of the dendrimers in the series. It is found that, in terms of largest coherence domain size, the optimum dendrimer generation is 4-arm G-0. Molecular 3PA cross section, sigma(3) = 10(-79) cm(6) s(2), is obtained for 4-arm G-2 dendrimer generation, which is, to our best knowledge, one of the largest intrinsic sigma(3) values measured for any organic molecule.
2-PHOTON ABSORPTION; COOPERATIVE ENHANCEMENT; STIMULATED-EMISSION;