异质性兴奋剂调节超原子M1Ag14 (M = Pd, Pt) 集群中的发光和手术行为
Baoqi Yin1, Junjie Kong1, Mengdi Guo2
1Department of Pharmacy, Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|June 20, 2025
概括
这项研究探讨了用 (Pd) 或 (Pt) 染超原子金属集群如何影响它们的光学性能. 用Pt进行兴奋剂增强光发光,而Pd兴奋剂延长了发射寿命,提供了新的调节策略.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 摄影化学的使用.
背景情况:
- 保护接体的超原子金属集群对于通过异金属兴奋剂调整光学性能和稳定性至关重要.
- 在这些群体中,精确的兴奋剂效应尚未完全理解,需要进一步调查.
研究的目的:
- 研究单个中央原子替代的调节机制对超原子合金集群的光学特性.
- 阐明M1Ag14星团 (M = Pd, Pt) 中的发光机制和兴奋状态动态.
主要方法:
- 合成8电子超原子合金集群 (M1Ag14) 使用二氨酸连接体,包括奇拉变体.
- 系统地研究光学特性:吸收,光发光 (PL) 和手术活动.
- 秒到纳秒的短暂吸收光谱,以澄清发光和兴奋状态动态.
主要成果:
- (Pt) 兴奋剂增加了HOMO-LUMO能量差距,并提高了Pt1Ag14中的光发光量子产量 (PLQY).
- (Pd) 兴奋剂通过减少辐射衰变速率,独特地延长了Pd1Ag14中的排放寿命,从而偏离了能量差距定律.
- 异构体R/S-Pe-M1Ag14集群表现出由中央剂原子调节的强烈的手术活性.
结论:
- 异金属兴奋剂提供了一种精确的方法来调整超原子金属集群的光学和光学特性.
- 了解激发状态动态是控制发光和开发先进纳米材料的关键.
- 该研究提供了关于发光机制的见解,包括三重状态发射和聚合诱导的PL增强.
相关概念视频
03:02Colors and Magnetism
12.4K
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...
12.4K
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
02:58Crystal Field Theory - Octahedral Complexes
28.0K
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...
28.0K
02:51Metal-Ligand Bonds
21.5K
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...
21.5K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
44.8K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
44.8K
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