生物 (BiO(IO3):一种新的极性酸盐,表现出一种 aurivillius 类型 (Bi2O2) 2+ 层和大量的 SHG 反应
Sau Doan Nguyen1, Jeongho Yeon, Sang-Hwan Kim
1Department of Chemistry, University of Houston, 136 Fleming Building, Houston, Texas 77204-5003, United States.
Journal of the American Chemical Society
|July 23, 2011
概括
一种新的极性材料,BiO ((IO ((3)),具有Bi ((3+) 和I ((5+) 离子,显示出显著的第二和生成 (SHG) 特性. 它的非中心对称结构和在非线性光学中的潜在应用得到了突出强调.
科学领域:
- 无机化学 无机化学
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
背景情况:
- 非中心对称 (NCS) 和极性材料对于非线性光学 (NLO) 应用至关重要.
- 奥里维利乌斯型化合物为发现新的NLO材料提供了一个有前途的结构框架.
研究的目的:
- 合成和表征一种新的NCS极性物质,其中含有单双子Bi(3+) 和I(5+).
- 研究合成化合物的第二和生成 (SHG) 特性和结构属性.
主要方法:
- 通过X射线衍射来确定晶体结构.
- 使用1064nm辐射进行第二波生成 (SHG) 测量.
- 极化,压电和电子结构分析.
主要成果:
- 成功合成和结构性表征BiO ((IO ((3)),一个Aurivillius类型的材料.
- 观察强烈的SHG反应 (∼12.5 × KDP).
- 识别NCS极极方方形空间组Pca2(1) 并将极性与IO(3) 多面体对齐相关联.
结论:
- 生物 (((IO ((3)) 是一个有前途的新NCS极地材料,具有显著的NLO特性.
- 该材料的结构,以 (Bi(2) O(2)) ((2+) 层和对齐的IO(3) 多面体为特征,是其强烈的SHG反应的基础.
- 对极化和压电的进一步调查证实了它的极性和对光电子设备的潜力.
更多相关视频
相关概念视频
01:23Redox Titration: Iodimetry and Iodometry
Iodometry and iodimetry are analytical methods used to determine the concentration of oxidizing or reducing agents using iodine. In iodometric titrations, the oxidizing analyte solution is usually acidified and treated with an excess of iodide ions, which generates an equivalent amount of iodine in equilibrium with triiodide. The released iodine is subsequently titrated directly against a standardized reducing agent. As the dilute iodine color becomes pale yellow, a few drops of freshly...
02:45Alkyl Halides
Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
01:13Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
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.
02:48Bond Polarity, Dipole Moment, and Percent Ionic Character
Bond Polarity
03:45Formation of Complex Ions
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...
03:11Precipitation of Ions
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is: