Time-resolved spectroscopy of organic dendrimers and branched chromophores

被引:69
作者
Goodson, T [1 ]
机构
[1] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA
关键词
energy transfer; excitons; femtosecond spectroscopy; materials; nonlinear optics; photon echo; organics;
D O I
10.1146/annurev.physchem.56.092503.141130
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
Organic dendrimers have been considered for a number of optical applications and are now of great interest for the purpose of enhanced nonlinear optical effects. In order to understand the mechanism of the enhanced effects in branched structures it is important to probe the fundamental excitations and the degree of intramolecular interactions utilizing various spectroscopic techniques. In this review, the nonlinear optical and excited state dynamics of different dendritic and other branching chromophore structures are discussed. The methods of two-photon absorption, time-resolved fluorescence, transient absorption, and three-pulse photon echo peak shift are discussed in regards to the degree of intramolecular coupling in the macromolecular systems. These techniques are also used for a comparison of the dynamics in the linear molecular analog systems as well. Thus, this review focuses on the aspect of intramolecular interactions in a branched system and its importance to enhanced nonlinear optical effects useful for modem optical devices.
引用
收藏
页码:581 / 603
页数:23
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