[Mn(DMSO) 的热稳定性,多态性和光谱性质6]ReO4) 2
Joanna Hetmańczyk1, Łukasz Hetmańczyk1, Wojciech Nitek1
1Jagiellonian University in Krakow, Faculty of Chemistry, Gronostajowa 2, 30-387, Krakow, Poland.
六甲基硫化 ((II) 酸盐 ((VII) 呈现结构相变和405K以上的热不稳定性.加热会导致晶体对称性和重定向障碍的变化,影响其性能.
科学领域:
- 固态化学 固态化学
- 材料科学是一种材料科学.
- 协调化学 协调化学
背景情况:
- 六甲基硫化 (hexadimethylsulfoxideemanganese) 酸 (rhenate) 酸 (VII),酸 (Mn) 酸 (DMSO) 酸 (ReO4) 2是一种协调化合物,在材料科学中具有潜在的应用.
- 了解它的热和结构性质对于预测它在各种条件下的行为至关重要.
研究的目的:
- 综合调查[Mn(DMSO) 6 的结构,热和振动特性.
- 阐明这种化合物中固态相变的机制和性质.
- 为了将光谱和计算发现与观察到的热事件相关联.
主要方法:
- 单晶X射线衍射用于结构确定.
- 热重力测量分析与质谱学 (TG-QMS) 结合,用于热稳定性和分解分析.
- 差分扫描热量计 (DSC) 用于识别相位过渡.
- 光学显微镜,红外 (IR) 和拉曼光谱仪用于振动分析.
- 密度函数理论 (DFT) 计算用于理论支持.
主要成果:
- 该化合物在三临床系统 (空间组P1 ̄) 中结晶,具有八面体Mn(II) 协调.
- 在338 K和358 K通过DSC观察到两个第一阶段固态相位过渡.
- 证实了高达405K的热稳定性,其次是逐步的DMSO连接体损失.
- 阶段过渡涉及从三临床P1 ̄到单临床C2 / m和三角P3 ̄ m1的对称性变化,与显著的重定向障碍相关.
- 光谱数据和DFT计算证实了分子结构和纯度,FT-IR显示了加热后晶体对称度增加的变化.
结论:
- [Mn{DMSO) 6}{ReO4) 2在加热时经历明显的固态相变,导致晶体对称性增加和旋转障碍.
- 该化合物具有有限的热稳定性,在405K以上的温度下,在连接物解离后分解.
- 结合实验和理论方法,可以详细了解这种协调化合物的结构动力学和热行为.
更多相关视频
05:47Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
相关概念视频
Properties of Transition Metals
Colors and Magnetism
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...
Molecular Orbital Theory II
Stereoisomerism
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
Radical Oxidation of Allylic and Benzylic Alcohols
