Two-photon absorption dependence on the temperature for azoaromatic compounds:: Effect of molecular conformation

被引：29

作者：

De Boni, L. ^{[1
]}

Piovesan, E. ^{[1
]}

Misoguti, L. ^{[1
]}

Zilio, S. C. ^{[1
]}

Mendonca, C. R. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2007年 / 111卷 / 28期

关键词：

D O I：

10.1021/jp0716684

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 [物理化学]; 081704 [应用化学];

摘要：

This work reports on the effect of temperature on the two-photon absorption cross section of azoaromatic chromophores. A linear decrease in the two-photon absorption cross section with the temperature was observed for several azochromophores. This process was characterized by introducing a two-photon absorption thermal coefficient (d delta/dT), whose typical values are similar to 2GM/degrees C for all the azochromophores studied here. Such an effect was attributed to thermal induced molecular conformation changes, described by the sum-over-states model and semiempirical calculations, which affect the molecular dipole moments. The characterization of the phenomenon reported here for other nonlinear materials can help in the design of specific applications using two-photon absorption.

引用

页码：6222 / 6224

页数：3

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