氧化活性三胺-氨酸共价有机框架:一个高表面积的微孔材料,用于电色和电色
Bhushan Kishor Nandre1, Sayan Halder1, Chanchal Chakraborty1,2
1Department of Chemistry, Birla Institute of Technology & Science (BITS) Pilani, Hyderabad Campus. Jawaharnagar, Samirpet, Hyderabad, Telangana, 500078, India.
Chemistry, an Asian journal
|December 11, 2024
概括
多孔共价有机框架 (COF) 显示出电色 (EC) 应用的前景. 这项研究开发了一种新的COF材料,可以实现高效的色彩切换和稳定的电染色行为,用于先进的显示器.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 多孔共价有机框架 (COF) 具有高表面积和多孔性,有利于电色 (EC) 应用.
- 诸如溶解度有限和薄膜形成能力差等挑战阻碍了在EC设备中COF的探索.
- 在COF中,氧化还原介导的扩散过程对于EC性能至关重要.
研究的目的:
- 为了合成和表征一种新的含有 redox活性三胺的COF (TPA-TCIF) 用于电色和电色.
- 为了评估合成的COF薄膜的EC和电色 (EFC) 特性.
- 为了证明TPA-TCIF在准固态电色器件 (ECD) 中的潜力.
主要方法:
- 在ITO玻璃上的TPA-TCIF COF的溶热合成.
- COF属性的表征包括表面积 (1136.8 m2/g) 和孔径 (1.18 nm).
- 电化学测试以评估氧化还原行为,颜色切换和稳定性.
主要成果:
- TPA-TCIF COF 呈现出可逆的颜色变化,从黄色到红,光学对比度 (ΔT) 为 37%,色彩效率 (CE) 为 47.7 cm2/C.
- 观察到稳定的电色 (EFC) 行为,在40个周期内从发射黄色切换到深黑.
- 由COF结构促进的高效离子传输导致切换时间缩短.
结论:
- 合成的TPA-TCIF COF显示出作为EC和EFC材料的绝佳潜力.
- 开发的COF材料显示出下一代显示技术的前景.
- 这项工作突显了COF在先进的电色应用中的巨大潜力.
更多相关视频
08:51Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
9.5K
07:11ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis
Published on: August 19, 2021
2.4K
相关概念视频
03:02Colors and Magnetism
11.5K
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...
11.5K
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
2.9K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
2.9K
01:26Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K
01:14Photoluminescence: Applications
374
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
374
01:26Variables Affecting Phosphorescence and Fluorescence
488
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
488