富含氧化的同位素和缺陷分析使用EPR光谱和DFT模拟
Razieh Hosseini1, Javad Karimi-Sabet2, Mehdi Janbazi3
1Department of Chemical Engineering, University of Kashan, Kashan, Iran.
Scientific reports
|January 24, 2026
概括
同位素 (Mo,Mo,Mo) 对于医学和研究至关重要. X波段电子偏磁共振 (EPR) 光谱学与模拟相结合,显示了在三氧化 (α-MoO3) 中分析这些同位素的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 核物理 核物理 核物理
- 频谱学是一种光谱学.
背景情况:
- 同位素 (Mo,Mo,Mo) 是医疗同位素99mTc的重要前体,影响医疗保健,材料科学和核研究.
- 电磁分离丰富了这些同位素,但需要敏感的分析方法来检测由于同位素质量变化的微妙电子结构变化.
研究的目的:
- 调查X波段电子偏磁共振 (EPR) 光谱作为探测同位素效应的敏感方法.
- 探索高频EPR在α-MoO3中对的同位素分析的潜力.
主要方法:
- 电磁丰富和化学提炼96Mo,97Mo和98Mo同位素.
- 使用X射线衍射 (XRD),扫描电子显微镜 (SEM),感应合等离子体 (ICP),ICP质谱法 (ICP-MS),光发光 (PL) 和EPR光谱法进行表征.
- 对电子,光学和EPR属性的初始计算,根据实验数据进行验证.
主要成果:
- 在精炼的同位素样本上进行了X波段EPR测量.
- 最初的计算确定了α-MoO3晶格中的原生缺陷.
- 模拟的高频EPR光谱 (W和J频段) 揭示了不同Mo同位素的潜在光谱特征.
结论:
- X波段EPR光谱是一种适合于探测中的同位素效应的方法.
- 支持DFT/MD模拟的高频EPR显示为一种有希望的工具,用于对α-MoO3中的同位素分析.
更多相关视频
13:21Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
Published on: August 18, 2012
19.5K
09:31Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
Published on: August 31, 2017
8.1K
相关概念视频
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals
3.4K
Ideally, an unpaired electron shows a single peak in the EPR spectrum due to the transition between the two spin energy states. However, coupling interactions can occur between the spins of the unpaired electron and any neighboring spin-active nuclei. This hyperfine coupling results in hyperfine splitting, where the EPR signal is split into multiplets. The signals split into 2nI + 1 peaks, where n is the number of equivalent nuclei and I is the nuclear spin. These splitting patterns provide...
3.4K
Isotopes
63.5K
Elements have a set number of protons that determines their atomic number (Z). For example, all atoms with eight protons are oxygen; however, the number of neutrons can vary for atoms of the same element. The sum of the number of protons and the number of neutrons is the mass number (A). Atoms with the same atomic number but different mass numbers are called isotopes. Elements can have multiple isotopes, for example, carbon-12, carbon-13, and carbon-14.
An element's atomic mass, or weight,...
An element's atomic mass, or weight,...
63.5K
Relation of DFT to z-Transform
806
The Discrete Fourier Transform (DFT) is a crucial tool for analyzing the frequency content of discrete-time signals. It converts a sequence of N samples from the time domain into its corresponding sequence in the frequency domain, where each sample represents a specific frequency component.
To understand how the DFT works, it's helpful to consider the z-transform, which is a method for representing discrete sequences in the complex frequency domain. The z-transform involves summing the...
To understand how the DFT works, it's helpful to consider the z-transform, which is a method for representing discrete sequences in the complex frequency domain. The z-transform involves summing the...
806
Elements: Chemical Symbols and Isotopes
125.5K
A chemical symbol is an abbreviation used to indicate an element or an atom of an element. For example, the symbol for mercury is Hg. The same symbol is used to indicate one atom of mercury (microscopic domain) or to label a container of many atoms of the element mercury (macroscopic domain).
Some symbols are derived from the common English name of the element; others are abbreviations of the name in another language — Latin, Greek or German. For example, the symbol for aluminum (common name)...
Some symbols are derived from the common English name of the element; others are abbreviations of the name in another language — Latin, Greek or German. For example, the symbol for aluminum (common name)...
125.5K
Oxidation Numbers
42.3K
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
42.3K
Isotopes and Radioisotopes
11.3K
In the early 1900s, English chemist Frederick Soddy realized that an element could have atoms with different masses that were chemically indistinguishable. These different types are called isotopes — atoms of the same element that differ in mass. Isotopes differ in mass because they have different numbers of neutrons but are chemically identical because they have the same number of protons. Soddy was awarded the Nobel Prize in Chemistry in 1921 for this discovery.
An isotope containing...
An isotope containing...
11.3K
