Phototoxic phytoalexins. Processes that compete with the photosensitized production of singlet oxygen by 9-phenylphenalenones

被引：41

作者：

Flors, C

Ogilby, PR

Luis, JG

Grillo, TA

Izquierdo, LR

Gentili, PL

Bussotti, L

Nonell, S

机构：

[1] Univ Ramon Llull, Inst Quim Sarria, Grp Engn Mol, E-08017 Barcelona, Spain

[2] Aarhus Univ, Dept Chem, DK-8000 Aarhus, Denmark

[3] Univ La Laguna, Inst Univ Bioorgan Antonio Gonzalez, E-38206 Tenerife, Spain

[4] Univ Florence, European Lab Nonlinear Spect, Florence, Italy

来源：

PHOTOCHEMISTRY AND PHOTOBIOLOGY | 2006年 / 82卷 / 01期

关键词：

D O I：

10.1562/2005-04-07-RA-479

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Experiments were performed to elucidate the excited-state behavior of 9-phenylphenalenones, which are phototoxic plant secondary metabolites involved in mechanisms of light-mediated plant defense. Using a combination of time-resolved and steady-state UV/visible spectroscopies, time-resolved IR absorption spectroscopy, time-resolved singlet oxygen phosphorescence measurements and cyclic voltammetry, we provide evidence of an intramolecular charge-transfer process in the excited singlet and the triplet states of 9-phenylphenalenones that modulates the photosensitized production of singlet oxygen.

引用

页码：95 / 103

页数：9

共 55 条

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