Picosecond Structural Relaxation of Abietic Acid Based Amine End Capped Para-Phenylenevinylene Trimers in Solution

被引：20

作者：

Di Paolo, Roberto E. ^{[1
]}

Gigante, Barbara ^{[2
]}

Esteves, Maria A. ^{[2
]}

Pires, Natercia ^{[2
]}

Santos, Celia ^{[2
]}

Lameiro, Maria H. ^{[3
]}

Seixas de Melo, Joao ^{[4
]}

Burrows, Hugh D. ^{[4
]}

Macanita, Antonio L. ^{[1
]}

机构：

[1] Inst Super Tecn, Dept Engn Quim & Biol, Ctr Quim Estrutural, P-1049001 Lisbon, Portugal

[2] INETI, Dept Tecnol Ind Quim, P-1649038 Lisbon, Portugal

[3] Inst Tecnol Quim & Biol, P-2781901 Oeiras, Portugal

[4] Univ Coimbra, Dept Quim, P-3004535 Coimbra, Portugal

来源：

CHEMPHYSCHEM | 2008年 / 9卷 / 15期

关键词：

amines; conformational relaxation; dehydroabietic acid; photophysics; time-resolved spectroscopy;

D O I：

10.1002/cphc.200800374

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：

The synthesis and photophysical properties of six new abietic acid based amine end-capped p-phenylenevinylene trimers (AECPV3) in their lowest excited singlet states are presented. The AECPV3 compounds show a large red-shift of both the absorption (25-30 nm) and emission (37-42 nm) maxima with respect to those of the corresponding trimers. Picosecond time-resolved fluorescence data reveal the presence of a fast conformational relaxation process (40-62 ps) of the initially excited compounds, leading to more planar conformers. The conformational relaxation time is proportional to the volume of both the side chain and the amine groups.

引用

页码：2214 / 2220

页数：7

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