Interaction between chlorophyll and silver nanoparticles: A close analysis of chlorophyll fluorescence quenching

被引：72
作者：
Falco, W. F. [1 ]
Queiroz, A. M. [1 ]
Fernandes, J. [1 ]
Botero, E. R. [1 ]
Falcao, E. A. [1 ]
Guimaraes, F. E. G. [2 ]
M'Peko, J. -C. [2 ]
Oliveira, S. L. [3 ]
Colbeck, I. [4 ]
Caires, A. R. L. [1 ]
机构：
[1] Fundacao Univ Fed Grande Dourados, Grp Opt Aplicada, BR-79804970 Dourados, MS, Brazil
[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
[3] Univ Fed Mato Grosso do Sul, Inst Fis, Grp Opt & Foton, BR-79007090 Campo Grande, MS, Brazil
[4] Univ Essex, Sch Biol Sci, Colchester CO4 3SQ, Essex, England
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2015年 / 299卷
关键词：
Chlorophyll; Fluorescence; Silver nanoparticle; Quenching; TOXICITY; PHOTOSYNTHESIS; GOLD;
D O I：
10.1016/j.jphotochem.2014.12.001
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：
Silver nanoparticles (Ag NPs) are among the most widely produced and used nanomaterial due to their antimicrobial and antibacterial properties, allowing a wide range of commercial applications. Thereby, the increasing use of Ag NPs should inevitably lead to the release and accumulation of these NPs into the environment, resulting in adverse effects on plants, animals and humans. Chlorophyll fluorescence (ChlF) has been proposed as a non-destructive and accurate tool for detecting the impacts of environmental stress on plants. Little is known about the photophysical behavior of plants when exposed to a metallic NPs-containing environment. The present study evaluated the interaction between chlorophyll (Chl) and Ag NPs, over a wide range of nanoparticle concentrations (from 0 mu M to 200.0 mu M), by monitoring the ChlF. The results reveal that the ChIF is quenched in the presence of Ag NPs, as a result of the static and dynamic quenching processes. The present results suggest that ChIF has a great potential to be used in the future as an analytical tool for monitoring the interaction of plants and NPs as well as investigating the effects of NPs on plants. (C) 2014 Elsevier B.V. All rights reserved.
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收藏
页码：203 / 209
页数：7
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