Drastic enhancement of two-photon absorption in porphyrins associated with symmetrical electron-accepting substitution

被引：110

作者：

Drobizhev, M

Karotki, A

Kruk, M

Mamardashvili, NZ

Rebane, A ^{[1
]}

机构：

[1] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

[2] PN Lebedev Phys Inst, Moscow 119991, Russia

[3] Natl Acad Sci, Inst Atom & Mol Phys, Minsk 220072, BELARUS

[4] Ivanovo State Univ Chem Technol, Ivanovo 153460, Russia

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 361卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(02)00999-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We observe a dramatic enhancement of simultaneous two-photon absorption (TPA) in a series of substituted tetraazaporphyrins with multiple electron-accepting groups and show for the first time that the TPA cross-section increases in linear proportion with the substituent's Hammett constant. The measured cross-section amounts to sigma(2) = 1.6 x 10(-47) cm(4) s/photon for octakis(4-nitrophenyl)-tetraazaporphine at 770 nm. This large value is explained by both the resonance enhancement by a strong Q(x)(0-0) linear transition and the presence in the same spectral region of a strong two-photon allowed gerade-gerade transition. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：504 / 512

页数：9

共 33 条

[21] Two-photon absorption and second hyperpolarizability of the linear quadrupolar molecule [J].