解锁DASA功能化协调综合体中的增强开关能力
Peng-Xuan Zheng1, Di-Yu Dou1, Song-Lin Ou1
1School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
Inorganic chemistry
|August 14, 2025
概括
研究人员开发了一种新的智能材料,通过将可光切换的捐赠者-接受者斯坦豪斯导管 (DASA) 与协调化学相结合. 这种新材料显示了增强的光敏性质,并允许使用水和光进行可擦除的书写.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 有机化学 有机化学
背景情况:
- 可光切换的分子是开发智能材料的关键组成部分.
- 捐赠者-接受者斯坦豪斯吸附体 (DASA) 是一种具有负光色和可见光响应性的新型有机光开关.
- 提高DASA的功能能力和克服DASA的局限性对于其实际应用至关重要.
研究的目的:
- 从DASAs中合成和描述第一个明确的晶体协调复合体.
- 调查基于DASA的协调复合体的增强固态热和光交换特性.
- 探索协调材料的动态行为和可调的物理特性,用于先进的应用.
主要方法:
- 双站点协调方法来合成基于DASA的协调复合体.
- 结晶协调复合体的表征.
- 评估固态热和光交换特性.
- 对刺激反应行为的分析和可调整的物理特性.
主要成果:
- 从DASAs中成功合成了第一个明确的晶体协调复合体.
- 与母DASA连接体相比,协调复合体表现出明显增强的固态热和光交换特性.
- 该材料对各种刺激表现出不同的反应,导致多个可访问的状态,具有可调节的特性,如渐进的颜色变化和色.
- 使用水作为墨水和光作为擦除机制的可擦除写作被证明.
结论:
- 协调化学显著提高了DASA的特性,创造了先进的智能材料.
- DASA协调复合体的动态和刺激响应性为可重写材料,信息编码和分子设备中的应用提供了一个多功能平台.
- 这项工作在可持续发展和环保意识的材料开发方面取得了重大进展.
相关概念视频
02:42Valence Bond Theory
9.7K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
9.7K
03:02Colors and Magnetism
12.3K
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...
12.3K
02:58Crystal Field Theory - Octahedral Complexes
27.9K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
27.9K
01:19Complexation Equilibria: The Chelate Effect
661
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
661
01:22EDTA: Chemistry and Properties
2.2K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
2.2K
02:34Structural Isomerism
19.7K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.7K