具有动态热色素主义的二维无双矿铁弹性材料
Chang-Yuan Su1,2, Heng-Guan Yi1,2, Hao-Fei Ni3
1Shanxi Key Laboratory for Radiation Safety and Protection, China Institute for Radiation Protection Taiyuan 030006 China scywmy@163.com.
Chemical science
|November 12, 2025
概括
研究人员使用环丁甲胺 (CBA+) 开发了新的矿铁弹性材料. 一种无双矿, (CBA) 4AgBiBr8,表现出热色和增加的域状态,为未来的应用扩展铁性材料.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 晶体学 晶体学是指结晶学.
背景情况:
- 铁弹性对于机械开关和能量转换至关重要.
- 铁弹性有机-无机混合矿的研究正在扩大.
- 需要进一步探索以扩大其材料系统和功能.
研究的目的:
- 使用环丁甲胺 (CBA+) 作为阴离子模板构建新的矿铁弹性材料.
- 开发无替代品以为基础的铁弹性材料.
- 研究这些新材料的功能性质,包括热色学.
主要方法:
- 合成了两个矿铁弹性材料: (CBA) 2PbBr4和 (CBA) 4AgBiBr8.
- 它们的铁弹性相变和基里温度 (Tc) 的表征.
- 对结构,光学和热色特性进行分析.
主要成果:
- 基于的 (CBA) 2PbBr4在Tc = 383.4 K时显示出铁弹性相变.
- 无双矿 (CBA) 4AgBiBr8 呈现 Tc = 346.7 K,具有 4 个域状态和更窄的带隙 (2.22 eV).
- 值得注意的是, (CBA) 4AgBiBr8显示了热色行为,这是混合双矿中罕见的现象.
结论:
- 通过使用CBA+成功合成了两种新的矿铁弹性材料.
- 无 (CBA) 4AgBiBr8提供了一个有前途的替代品,具有增强的性能和热色.
- 这项工作扩大了矿铁弹性材料的家族,并展示了将无设计与高级功能相结合的策略.
相关概念视频
02:58Properties of Transition Metals
28.2K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
28.2K
02:51Metal-Ligand Bonds
19.3K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
19.3K
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
01:26Diamagnetism
2.8K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.8K
01:31Ferromagnetism
2.8K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.8K
01:12Fermi Level Dynamics
1.1K
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
1.1K