Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

4.1K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
4.1K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

3.1K
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.
3.1K
¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR01:15

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR

1.8K
The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one proton, the remaining eleven protons are replaced by deuterium. The deuterium substitution avoids the possible peak splitting caused by the spin-spin coupling between the adjacent protons. The remaining proton flips between the axial and equatorial positions.
1.8K
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

1.8K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.8K
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution00:52

¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

1.4K
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
1.4K
Conformations of Cyclohexane02:11

Conformations of Cyclohexane

16.6K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
16.6K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

5,12-TIPS-Substitution of Tetracene: Effects on Redox Potentials and Cyclic Voltammetric Behavior in CH<sub>2</sub>Cl<sub>2</sub> and THF.

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

RE-ADC: The algebraic diagrammatic construction scheme for the polarization propagator using the retaining-the-excitation-degree partitioning.

The Journal of chemical physics·2026
Same author

Ethynylene-Linked 1,2-Dihydro-1,2-Azaborinines With High Energy Densities for Efficient Molecular Solar Thermal Energy Storage.

ChemSusChem·2026
Same author

Green circularly polarized luminescence with a high dissymmetry factor emitted by a [2.2]fluorenonophane.

Physical chemistry chemical physics : PCCP·2026
Same author

The Nodal Structure of π-Orbitals Is Mapped in the Interaction Energy of π-Stacked Acene Dimers.

Journal of the American Chemical Society·2026
Same author

Revisiting acene dimers: A comprehensive theoretical study of a less explored conformer.

The Journal of chemical physics·2026

関連する実験動画

Updated: Mar 6, 2026

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes
09:47

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

Published on: February 19, 2016

10.2K

ヘプタセーン:溶液,固体,フィルムでの特徴付け

Ralf Einholz1, Treliant Fang2, Robert Berger3,4

  • 1Institut für Organische Chemie, Universität Tübingen , Auf der Morgenstelle 18, 72076 Tübingen, Germany.

Journal of the American Chemical Society
|March 21, 2017
PubMed
まとめ

研究者達は 大量ヘプタセンという 重要な有機半導体を作り出すために ディヘプタセンの前駆体を使いました この突破により,室温で固体形態のヘプタセンの性質を研究することができます.

さらに関連する動画

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
08:18

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

2.2K
Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
09:35

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

12.1K

関連する実験動画

Last Updated: Mar 6, 2026

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes
09:47

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

Published on: February 19, 2016

10.2K
Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
08:18

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

2.2K
Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
09:35

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

12.1K

科学分野:

  • オーガニックの電子機器
  • ナノスケールの炭素材料
  • アセンの化学作用

背景:

  • アセンは重要な有機半導体であり グラフェンナノリボンに 精度の高い原子モデルです
  • 最も小さなアセンのヘプタセンは,歴史的にマトリックス分離の研究に限定されています.
  • 大量ヘプタセンの確認は,材料科学における長年の課題です.

研究 の 目的:

  • 大量ヘプタセンの合成と特徴づけ
  • 固体ヘプタセンの安定性と性質を調査する
  • 更に研究するためにヘプタセンのフィルムを生成する方法を確立する.

主な方法:

  • 7,16-ヘプタセニクオンの還元により,ダイヘプタセンの分子が形成される.
  • ディヘプタセンの熱分解により,固体ヘプタセンが生成される.
  • サイクル逆転と安定性を監視するために,固体13C交差極化魔法の角度回転NMR.

主要な成果:

  • ディヘプタセンの前駆物質の 合成が成功しました
  • ディヘプタセンを熱分解してヘプタセンを生成する.
  • 固体ヘプタセンの室温半減期を数週で決定する.
  • 蒸気で堆積したヘプタセンのフィルムの前駆体としてのダイヘプタセンの開発.

結論:

  • ディヘプタセンは,固体ヘプタセンの生成のための効果的な前駆体である.
  • 固体ヘプタセンは室温で特徴づけられるほど安定している.
  • ナノスケールの炭素材料に関する新しい研究を可能にしました