Solvent effects on the two-photon absorption of distyrylbenzene chromophores

被引：308

作者：

Woo, HY ^{[1
]}

Liu, B ^{[1
]}

Kohler, B ^{[1
]}

Korystov, D ^{[1
]}

Mikhailovsky, A ^{[1
]}

Bazan, GC ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Mitsubishi Chem Ctr Adv Mat, Dept Mat, Inst Polymers & Organ Solids, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2005年 / 127卷 / 42期

关键词：

D O I：

10.1021/ja052906g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of organic- and water-soluble distyrylbenzene-based two-photon absorption (TPA) fluorophores containing dialkylamino donor groups at the termini was designed, synthesized, and characterized. The central core was systematically substituted to modulate intramolecular charge transfer (ICT). These molecules allow an examination of solvent effects on the TPA cross section (delta) and on the TPA action cross section. In toluene, the delta values follow the order of ICT strength. The effect of solvent on delta is nonmonotonic: maximum delta was measured in an intermediate polarity solvent (THF) and was lowest in water. We failed to find a correlation between the observed solvent effect and previous theoretical predictions. Hydrogen bonding to the donor groups and aggregation of the optical units in water, which are not included in calculational analysis, may be responsible for the discrepancies between experimental results and theory.

引用

页码：14721 / 14729

页数：9

共 108 条

[1] Novel two-photon absorbing dendritic structures [J].