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Updated: Jun 6, 2025

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA
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Published on: May 16, 2016

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由于有机和水涂层,森林火灾中固态棕色碳的增强吸光能力

Zezhen Cheng1, Manish Shrivastava2, Amna Ijaz1,2,3

  • 1Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA.

Nature communications
|November 28, 2024
PubMed
概括

野火会发出吸光的焦油球 (固体S-BrC),影响气候. 它们的特性,包括吸收水,显著改变光的吸收,需要纳入气候模型,以准确地预测地球辐射预算.

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UV–Vis Spectroscopy: Woodward–Fieser Rules

UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given...
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Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
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