Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

π Molecular Orbitals of 1,3-Butadiene01:24

π Molecular Orbitals of 1,3-Butadiene

8.7K
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...
8.7K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

41.7K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
41.7K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

26.2K
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...
26.2K
UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

6.9K
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent...
6.9K
UV–Vis Spectroscopy: Woodward–Fieser Rules01:29

UV–Vis Spectroscopy: Woodward–Fieser Rules

23.9K
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...
23.9K
Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

46.6K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
46.6K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Regulating B-O Arrangement Boosts Anisotropy in a Simple Rubidium Borate, Leading to a High-Performance UV NLO Crystal.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

The condensation of π-conjugated units: a new paradigm for designing high-performance optical crystals.

Chemical Society reviews·2026
Same author

The Power of Pnictogen Bond: As─As Linkages Drive Wide Bandgap, Strong NLO Response and Large Birefringence in SrGa<sub>3</sub>Si<sub>4</sub>As<sub>11</sub>.

Angewandte Chemie (International ed. in English)·2026
Same author

Synthesis and characterization of hydrated alkali metal calcium nitrates ACa(NO<sub>3</sub>)<sub>3</sub>·2H<sub>2</sub>O (A = NH<sub>4</sub>, Rb, Cs) as short ultraviolet birefringent materials.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

Synthesis and characterization of mixed carbonate and bicarbonate materials as candidates for deep-UV applications.

Chemical communications (Cambridge, England)·2026
Same author

Hydrogen-Bond-Directed Assembly of Urea Derivatives: Exceptional Birefringence Achieved by π-Conjugated Unit Alignment.

Small (Weinheim an der Bergstrasse, Germany)·2026

相关实验视频

Updated: Jun 12, 2025

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

6.4K

利用深紫外线非线性光学材料Rb2ScB3O6F2起源于对应方向的[B3O6]组.

Qianzhen Zhang1,2, Ran An1,2, Xifa Long1,2

  • 1Research Center for Crystal Materials, State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Functional Crystal Materials, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, 40-1 South Beijing Road, Urumqi, 830011, China.

Angewandte Chemie (International ed. in English)
|September 20, 2024
PubMed
概括

研究人员设计了一种新的深紫外线非线性光学 (NLO) 晶体,Rb2ScB3O6F2 (RSBF),比现有材料提供更好的性能. 通过实现更短的深紫外线波长,RSBF显示了先进固态激光的潜力.

关键词:
[B3O6] 是一个有价值的生物.深深的紫外线的紫外线.非线性光学晶体的非线性光学晶体.稀土玻酸化物稀土玻酸化物

更多相关视频

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
06:49

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

Published on: April 12, 2019

7.6K
Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
09:45

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

Published on: July 26, 2016

12.3K

相关实验视频

Last Updated: Jun 12, 2025

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

6.4K
Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
06:49

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

Published on: April 12, 2019

7.6K
Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
09:45

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

Published on: July 26, 2016

12.3K

科学领域:

  • 材料科学 材料科学 材料科学
  • 光学是什么?光学是什么?光学是什么?
  • 固态物理 固态物理

背景情况:

  • 深紫外线 (UV) 非线性光学 (NLO) 晶体对于所有固态激光器至关重要.
  • 商业NLO晶体如β-酸 (β-BBO) 的性能有限.
  • 探索具有增强深紫外线能力的新NLO材料是必不可少的.

研究的目的:

  • 设计和探索新的深紫外NLO材料.
  • 为了利用β-BBO中发现的[B3O6]结构单元来开发新的晶体.
  • 调查稀土金属酸在NLO应用中的潜力.

主要方法:

  • 设计了一种新的深紫外NLO晶体,Rb2ScB3O6F2 (RSBF),使用异价离子替代和化策略.
  • 分析了RSBF的光学特性,包括切断边和双折.
  • 评估了RSBF的相匹配 (PM) 特性和频率加倍效应.

主要成果:

  • 在175nm以下,RSBF具有极短的切断边,超过β-BBO的189nm.
  • 在1064 nm,RSBF显示0.088的中度双断率.
  • RSBF最短的PM波长 (182纳米) 比β-BBO (205纳米) 短得多,实验频率翻倍证明了深紫外线波激光潜力.

结论:

  • 与β-BBO相比,Rb2ScB3O6F2 (RSBF) 是一个有前途的深紫外NLO材料,具有优越的光学性能.
  • 采用的设计策略为深紫外线NLO材料的合理开发提供了新的见解.
  • RSBF具有在先进的固态激光器中应用的潜力,这些激光器需要深紫外线波生成.