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The Case Against Charge Transfer Interactions in Dissolved Organic Matter Photophysics

机译：反对溶解有机物光物理中电荷转移相互作用的案例

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摘要

src="http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/esthag/2018/esthag.2018.52.issue-2/acs.est.7b03589/20180111/images/medium/es-2017-03589b_0005.gif">The optical properties of dissolved organic matter influence chemical and biological processes in all aquatic ecosystems. Dissolved organic matter optical properties have been attributed to a charge-transfer model in which donor–acceptor complexes play a primary role. This model was evaluated by measuring the absorbance and fluorescence response of organic matter isolates to changes in solvent temperature, viscosity, and polarity, which affect the position and intensity of spectra for known donor–acceptor complexes of organic molecules. Absorbance and fluorescence spectral shape were largely unaffected by these changes, indicating that the distribution of absorbing and emitting species was unchanged. Overall, these results call into question the wide applicability of the charge-transfer model for explaining organic matter optical properties and suggest that future research should explore other models for dissolved organic matter photophysics.
机译：src =“ http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/esthag/2018/esthag.2018.52.issue-2/acs.est.7b03589/20180111/images/medium /es-2017-03589b_0005.gif“>溶解的有机物的光学特性会影响所有水生生态系统中的化学和生物过程。溶解的有机物的光学特性归因于电荷转移模型，其中供体-受体复合物起主要作用。通过测量分离的有机物对溶剂温度，粘度和极性变化的吸收和荧光响应来评估该模型，溶剂温度，粘度和极性的变化会影响已知有机分子供体-受体配合物的光谱位置和强度。吸光度和荧光光谱形状在很大程度上不受这些变化的影响，表明吸收和发射物质的分布没有变化。总的来说，这些结果使人们质疑电荷转移模型在解释有机物光学特性方面的广泛适用性，并建议未来的研究应探索其他用于溶解有机物光物理的模型。

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  • 来源
    《Environmental Science & Technology》 |2018年第2期|406-414|共9页
  • 作者

    Garrett McKay; Julie A. Korak; Paul R. Erickson; Douglas E. Latch; Kristopher McNeill; Fernando L. Rosario-Ortiz;

  • 作者单位

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Colorado 80309, United States;

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Colorado 80309, United States,Bureau of Reclamation, Department of the Interior, PO Box 25007, Denver, Colorado 80225, United States;

    Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, 8092 Zurich, Switzerland;

    Department of Chemistry, Seattle University, Seattle, Washington 98122, United States;

    Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, 8092 Zurich, Switzerland;

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Colorado 80309, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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