协调聚合物中的水诱导结构不稳定性,用于对Cu2+和氨酸的双通道光传感
Huang-Jie Li1, Shunxing Li1,2, Ya-Lin Zhang1
1College of Chemistry, Chemical Engineering & Environmental Science, Minnan Normal University, Zhangzhou 363000, China.
Analytical chemistry
|June 18, 2025
概括
这项研究开发了一种新的光传感器,使用水不稳定的协调聚合物 (Zn-CPs) 来检测铜离子 (Cu2+) 和氨酸 (Cys). 传感器利用结构变化,在环境和生物样本中进行敏感的双通道检测.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 纳米技术 纳米技术
背景情况:
- 协调聚合物 (CPs) 提供结构性可调性,但存在水位不稳定性,限制了应用.
- 开发用于环境和生物分析的强大的传感器,如铜离子 (Cu2+) 和氨酸 (Cys),至关重要.
研究的目的:
- 设计一个双通道光传感器,使用水不稳定的协调聚合物 (Zn-CPs).
- 通过利用结构转换来实现水中的Cu2+和血清中的Cys的敏感检测.
主要方法:
- 利用了水不稳定的Zn-CPs,它们在水中经历结构崩,灭了蓝色光.
- 采用pH调整来激活连接体聚合诱导排放 (AIE),产生绿色光.
- 研究了-铜协同协调聚合物 (Zn/Cu-CPs) 在Cu2+引入和Cys干扰后的形成.
主要成果:
- 2+促进了Zn/Cu-CP的形成,增强了稳定性并保留了蓝色光,同时抑制了绿色光.
- Cys与Cu2+竞争,阻止了Zn/Cu-CP的形成,导致了蓝色光火和绿色光激活.
- 获得的敏感检测范围:为Cu2+的0.01-0.25 mg/L (LOD:0.0162 mg/L) 和为Cys的0.5-14 μM (LOD:0.4380 μM).
结论:
- 证明了水不稳定的CP在传感应用中的实用性,挑战了传统的稳定性要求.
- 为设计基于分析剂诱导的结构转换的光传感器提供了新的见解.
- 强调了使用这种创新的传感器设计进行环境监测和生物分析的潜力.
更多相关视频
11:38Quantifying the Binding Interactions Between CuII and Peptide Residues in the Presence and Absence of Chromophores
Published on: April 5, 2022
2.6K
11:04Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
Published on: September 7, 2019
9.3K
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
02:58Crystal 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
01:26EDTA: Auxiliary Complexing Reagents
679
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
679
00:56Extraction: Advanced Methods
550
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
550
03:45Formation of Complex Ions
24.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
24.0K
00:43Complexometric Titration: Ligands
1.1K
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
1.1K