Charge transfer enhances two-photon absorption in transition metal porphyrins

被引：57

作者：

Humphrey, JL ^{[1
]}

Kuciauskas, D ^{[1
]}

机构：

[1] Virginia Commonwealth Univ, Dept Chem, Richmond, VA 23284 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2006年 / 128卷 / 12期

关键词：

D O I：

10.1021/ja0588353

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two-photon absorption processes were investigated in electropolymerized Fe(III), Mn(III), and Co(II) 5,10,15,20-tetrakis-(4-hydroxytetraphenyl)porphyrin films. Degenerate four wave mixing (DFWM) spectroscopy with 100 fs pulses in the near-IR spectral region was used. Metalloporphyrins with strong charge transfer (CT) transitions in the linear absorption spectra also show enhanced two-photon absorption. (Metalloporphyrin two-photon absorption cross section, δ, increases >10 times over that for the metal free porphyrin.) This effect was attributed to a two-photon induced charge transfer between the metal ion's d orbitals and the π-system of the porphyrin. Correlation of one- and two-photon absorption properties of transition metal porphyrins suggests a new and simple approach to improve organic materials for photonic applications. Copyright © 2006 American Chemical Society.

引用

页码：3902 / 3903

页数：2

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