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相关概念视频

Weak Base Solutions03:21

Weak Base Solutions

22.8K
Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
22.8K
Common Ion Effect03:24

Common Ion Effect

41.9K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
41.9K
Chemical Equations03:10

Chemical Equations

63.7K
Chemical equations represent the identities and relative quantities of substances involved in a chemical reaction. The substances undergoing reaction are called reactants, and their formulas are placed on the left side of the equation. The substances generated by the reaction are called products, and their formulas are placed on the right side of the equation. Plus signs (+) separate individual reactant and product formulas, and an arrow (→) separates the reactant and product (left and...
63.7K
Solution Composition During Acid/Base Titrations01:17

Solution Composition During Acid/Base Titrations

615
The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
The α0 and α1 values...
615
π Molecular Orbitals of 1,3-Butadiene01:24

π Molecular Orbitals of 1,3-Butadiene

9.3K
Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
9.3K
Chemical Reactions in Aqueous Solutions03:03

Chemical Reactions in Aqueous Solutions

61.1K
Chemical substances interact in many different ways. Certain chemical reactions exhibit common patterns of reactivity. Due to the vast number of chemical reactions, it becomes necessary to classify them based on the observed patterns of interaction.
61.1K

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Determination of Thermodynamic Properties of Alkaline Earth-liquid Metal Alloys Using the Electromotive Force Technique
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[BaBa] 这是一个很好的例子.

Kaixuan Ding1,2, Hongping Wu1, Zhanggui Hu1

  • 1Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, College of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.

Small (Weinheim an der Bergstrasse, Germany)
|June 5, 2023
PubMed
概括
此摘要是机器生成的。

研究人员合成了一种新型的含有二硫化物键的含盐含量素化物[Ba4(S2) ][ZnGa4S10],它显示出用于红外非线性光学应用的宽带间隙和增强的双折射.

关键词:
这是一个 π 结合的 π 结合.非线性光学 (NLO) 材料聚甲基化物多甲基化物.含盐的素化物包括盐.结构与财产关系的关系.

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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:

  • 盐含量素化物 (SIC) 已知具有很大的第二子生成 (SHG) 和宽带间隙.
  • 然而,大多数SIC具有有限的双折射,限制了它们在非线性光学 (NLO) 中的实际使用.

研究的目的:

  • 合成一种新型的SIC,具有改进的双断率.
  • 探索含有二硫化物键的SIC在红外 (IR) NLO应用中的潜力.

主要方法:

  • 合成了一种含有二硫化物键的新型SIC,[Ba4(S2)][ZnGa4S10].
  • 描述其光学特性,包括带隙和双折.
  • 理论计算以了解结构与属性之间的关系.

主要成果:

  • 合成的材料[Ba4(S2) ][ZnGa4S10],在聚甲基化物中表现出最宽的带隙 (3.39 eV).
  • 它显示出强烈的SHG反应,与AgGaS2 (AGS) 相美.
  • 最重要的是,它在1064nm时达到0.053的最大双断率,超过了其他类似AGS的SIC.

结论:

  • 加入π-结合 (S2)2-单元和共价的Ga-S层可以增强双折射和SHG.
  • [Ba4(S2)][ZnGa4S10]是一种有前途的IR NLO材料,具有用于先进光学设备的潜力.
  • 这项工作引入了一个新的SIC类别,并为未来的IR NLO材料提供了设计原则.