AI Article Synopsis
- The optical properties of dissolved organic matter (DOM) significantly impact chemical and biological processes in aquatic ecosystems, and these properties have been traditionally explained by a charge-transfer model.
- Researchers tested this model by examining how changes in solvent temperature, viscosity, and polarity affected the absorbance and fluorescence of organic matter isolates, finding that these changes did not alter the spectral shape.
- The findings challenge the effectiveness of the charge-transfer model in explaining DOM's optical properties, suggesting a need for further research into alternative models for understanding the photophysics of dissolved organic matter.
Article Abstract
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.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.est.7b03589 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!