光特征和主要的光组件在缅甸"大猩猩"珀
Shiyi Li1, Jinfeng Yang1, Yan Li2
1Gemmological Institute, China University of Geosciences, Wuhan 430074, China; Hubei Gems and Jewelry Engineering Technology Research Centre, Wuhan 430074, China.
概括
缅甸黑猩猩珀表现出独特的蓝绿色表面光,这是由于特定的光中心和身体颜色相互作用. 芳香化合物,包括[a],有助于其独特的光谱和宝石学特性.
科学领域:
- 宝石学宝石学是一门学科.
- 有机地化学 有机地化学
- 频谱学是一种光谱学.
背景情况:
- 在Tengchong市场发现的缅甸黑猩猩珀,显示出独特的蓝绿色表面颜色.
- 它的车身颜色从金色棕色到红色,在特定的照明条件下均的绿色表面光泽.
研究的目的:
- 为了研究缅甸黑猩猩珀的宝石学特性.
- 分析其光谱特征并确定其独特光的有机成分.
主要方法:
- 三维 (3D) 光光谱分析光中心和波长.
- 颜色模拟和叠加以了解颜色现象.
- 头部空间固相微提取气色谱-质谱 (HS-SPME-GC-MS) 用于有机化合物分析.
- 高性能液体色谱-光探测器 (HPLC-FD) 用于识别光芳香物.
主要成果:
- 缅甸黑猩猩珀在433,465和470纳米处呈现光中心.
- 激发波长转移到可见区域 (410 ± 10 nm),发射集中在蓝绿色光谱中.
- 漂浮的蓝绿色光被表面光和身体颜色的相互作用增强.
- HS-SPME-GC-MS揭示了与地质过程和光有关的多种芳香化合物.
- 子[a]被确定为一个关键的光芳香化合物,负责珀的特征.
结论:
- 缅甸白珀的独特光学特性来自特定的光中心及其与身体颜色的相互作用.
- 地质过程和芳香化合物的存在,特别是[a],决定了它的光和光谱特征.
更多相关视频
相关概念视频
01:26Variables Affecting Phosphorescence and Fluorescence
499
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
499
01:25Fluorescence and Phosphorescence: Instrumentation
591
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
591
01:29Atomic Fluorescence Spectroscopy
291
Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which...
291
01:12Immunofluorescence Microscopy
10.4K
A fluorescence microscope uses fluorescent chromophores called fluorochromes, which can absorb energy from a light source and then emit this energy as visible light. Fluorochromes include naturally fluorescent substances (such as chlorophylls) and fluorescent stains that are added to the specimen to create contrast. Dyes such as Texas red and FITC are examples of fluorochromes. Other examples include the nucleic acid dyes 4’,6’-diamidino-2-phenylindole (DAPI), and acridine orange.
10.4K
01:23Photoluminescence: Fluorescence and Phosphorescence
2.0K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
2.0K
01:14Photoluminescence: Applications
393
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
393