原子力显微镜识别燃料热解产品并指导分析标准的合成
Shadi Fatayer1, Nimesh B Poddar2, Sabela Quiroga3
1IBM Research-Zurich , 8803 Rüschlikon , Switzerland.
Journal of the American Chemical Society
|June 13, 2018
概括
使用原子力显微镜 (AFM) 和分析工具的新方法识别了燃料热解产品中的新型多环芳. 这种方法可以发现和合成新的燃料成分.
科学领域:
- 分析化学
- 有机化学
- 材料科学
背景情况:
- 多环芳 (PAH) 在燃料燃烧和热解中普遍存在.
- 在燃料中描述复杂的PAH混合物仍然是一个重大的分析挑战.
- 新的PAH结构可能会对燃料特性和环境影响产生影响.
研究的目的:
- 在复杂分子混合物中开发和演示用于检测,识别和量化新型PAH的多学科方法.
- 使用开发的方法来描述n-decane,一个模型燃料的超临界热解产物.
- 建立一种用于合成和验证新发现的PAH的分析标准.
主要方法:
- 原子力显微镜 (AFM) 与高性能液体染色学 (HPLC),二极管阵列紫外线吸收和质谱学 (MS) 的整合.
- 合成化学用于制备AFM识别的新化合物.
- 来自n-decane的超临界热解产品的特征.
主要成果:
- 在n-decane热解产品中发现和鉴定一种新的PAH,[l][1,2,3-cd].
- 新型[1,2,3-cd]pyrene的化学合成和AFM验证取得成功.
- 使用合成的参考标准,明确识别和量化这种新型PAH作为燃料产品.
- 检测了几种以前未知的五到八环PAH,代表了新的燃料热解/燃烧产物.
结论:
- 综合AFM,分析化学和合成化学方法可以在复杂的混合物中发现新型PAH.
- 这种方法为创建以前未描述的燃料组件的新分析标准提供了途径.
- 这些发现有助于了解燃料热解和燃烧过程中PAH的形成.
相关概念视频
01:08Atomic Force Microscopy
4.5K
Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
4.5K
03:12Batteries and Fuel Cells
31.0K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
31.0K
02:44Atomic Orbitals
44.8K
An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.
44.8K
03:13Intermolecular Forces
71.6K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
71.6K
03:21The Energies of Atomic Orbitals
30.3K
In an atom, the negatively charged electrons are attracted to the positively charged nucleus. In a multielectron atom, electron-electron repulsions are also observed. The attractive and repulsive forces are dependent on the distance between the particles, as well as the sign and magnitude of the charges on the individual particles. When the charges on the particles are opposite, they attract each other. If both particles have the same charge, they repel each other.
30.3K
03:00Intermolecular vs Intramolecular Forces
97.5K
Intermolecular forces (IMF) are electrostatic attractions arising from charge-charge interactions between molecules. The strength of the intermolecular force is influenced by the distance of separation between molecules. The forces significantly affect the interactions in solids and liquids, where the molecules are close together. In gases, IMFs become important only under high-pressure conditions (due to the proximity of gas molecules). Intermolecular forces dictate the physical properties of...
97.5K