(NH4) 2Cd2Cl3F3和 (NH4) 2Cd2Br3F3:第一个含的金属混合化物,具有优越的紫外线非线性光学特性
Seunghun Choi1, Yang Li1, Yunseung Kuk1
1Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul, 04107, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 28, 2025
概括
两个新的混合化物化合物 (NH4) 2Cd2Cl3F3和 (NH4) 2Cd2Br3F3,显示强烈的紫外线非线性光学 (NLO) 特性. 这些材料对于先进的NLO应用是有前途的,因为它们具有高的第二和生成效率和宽带间隙.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 光电学是指光电子产品.
背景情况:
- 开发新的紫外线 (UV) 非线性光学 (NLO) 材料对于先进的光子应用至关重要.
- 现有的UV NLO材料通常在效率,透明度或合成可访问性方面面临限制.
研究的目的:
- 为UV NLO应用合成和表征新的混合化物化合物.
- 研究这些新型材料的NLO性能的结构-属性关系.
主要方法:
- 通过热水合成,获得了 (NH4) 2Cd2Cl3F3和 (NH4) 2Cd2Br3F3.3的单晶.
- 晶体分析证实了它们的非中心对称 (NCS) 空间组R32结构.
- 测量了第二和生成 (SHG) 效率和UV-Vis吸收光谱.
主要成果:
- 这两种合成的化合物都表现出显著的SHG效率 (3.0x和8.0xKH2PO4分别为Cl-和Br-模拟物),具有相匹配特性.
- 这些材料具有宽带间隙 (>4.2 eV) 和短的紫外线吸收切断边缘 (203 nm和243 nm).
- 增强的NLO反应与扭曲的d10 Cd2+协调和化物极化性有关.
结论:
- 新型混合化物化合物是UV NLO应用的有希望的候选物.
- 这项工作为具有可调节光学特性的d10金属混合化物系统建立了新的合成路径.
- 这些材料代表了UV透明NLO材料领域的重大进步.
更多相关视频
10:41Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
Published on: May 31, 2018
8.7K
08:12Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
9.5K
相关概念视频
02:52Stereoisomerism
11.7K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
11.7K
01:29UV–Vis Spectroscopy: Woodward–Fieser Rules
23.7K
UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given...
23.7K
01:13Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
5.8K
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
5.8K