罗伯特·德劳内使用的基于的紫色颜料中的结构-光学特性关系
Victor Gonzalez1, Gilles Wallez2,3,4, Didier Gourier2,4
1Université Paris-Saclay, ENS Paris-Saclay, CNRS, PPSM, 91190 Gif-sur-Yvette, France.
Journal of the American Chemical Society
|January 8, 2025
概括
这项研究分析了艺术家罗伯特·德劳内使用的无机紫色素. 研究人员为酸盐和酸盐家族建立了结构-颜色关系,揭示了他们在20世纪初艺术中的使用.
科学领域:
- 艺术保护科学
- 无机化学
- 材料科学
背景情况:
- 紫色颜料,特别是基于的颜料,在19世纪末和20世纪初的艺术中获得了普及.
- 尽管在现代和当代绘画中广泛使用,但酸和酸紫色素的化学和结构性质仍未得到充分研究.
- 著名的法国前卫艺术家罗伯特·德劳内 (Robert Delaunay) 在他的早期作品中使用了这些紫色颜料.
研究的目的:
- 为了化学表征罗伯特·德劳内使用的无机紫色素.
- 确定酸盐和酸盐化合物的晶体结构和颜色 (色调) 之间的关系.
- 为了研究Delaunay杰作中的颜料的现场成分和光学特性.
主要方法:
- 参考酸盐和酸盐材料的合成
- 使用基于同步子辐射的高角分辨率X射线粉碎衍射 (XRD) 进行表征.
- 通过紫外线可见近红外光谱 (UV-vs-NIR) 的光学分析.
- 在艺术品上的现场XRD (成像模式) 和光纤UV-vs-NIR反射光谱.
主要成果:
- 首次确定了-/ (Co-P/As) 家族中的无机化合物的结构-颜色关系.
- 特定的结构和化学成分负责观察到的紫色.
- 证实了罗伯特·德劳内早期绘画中这些颜料的存在和特征.
结论:
- 无机紫色颜料的结构化学显著影响它们的颜色特性.
- 这项研究为罗伯特·德劳内 (Robert Delaunay) 以及其他艺术家所使用的材料提供了重要的化学见解.
- 了解这些颜色组合有助于保存和分析20世纪初的艺术.
更多相关视频
09:57Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
6.0K
14:12Dual-Color Fluorescence Cross-Correlation Spectroscopy to Study Protein-Protein Interaction and Protein Dynamics in Live Cells
Published on: December 11, 2021
5.2K
相关概念视频
02:42Valence Bond Theory
8.9K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.9K
03:02Colors and Magnetism
12.1K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.1K
01:02Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
7.8K
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for...
7.8K
01:28IR and UV–Vis Spectroscopy of Carboxylic Acids
4.6K
In IR spectroscopy of carboxylic acids, the C=O bond shows a characteristic band between 1710 and 1760 cm⁻¹, and the O–H bond exhibits a broad band between 2500 and 3300 cm⁻¹.
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency,...
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency,...
4.6K
01:32UV–Vis Spectroscopy of Conjugated Systems
5.9K
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.
One of the factors influencing λmax is...
One of the factors influencing λmax is...
5.9K
01:29UV–Vis Spectroscopy: Woodward–Fieser Rules
30.7K
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...
30.7K