関連する実験動画
Updated: Aug 18, 2025

06:48
CD Spectroscopy to Study DNA-Protein Interactions
Published on: February 10, 2022
6.9K
テラヘルツ環状二極化分子組立とナノ構造のスペクトロスコーピー
Won Jin Choi1,2,3, Sang Hyun Lee1,4, Bum Chul Park1,2
1Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States.
Journal of the American Chemical Society
|December 9, 2022
まとめ
テラヘルツ環状二重化 (TCD) スペクトロスコピーは分子と結晶の構造を明らかにする. この高度な技術は 低周波の振動を検知し 複雑な生物学的およびナノスケール材料に関する 新たな洞察を提供します
科学分野:
- 電子式 (ECD) と振動式 (VCD) の円形二重性を含むカイロプティカルスペクトロスコピーは,化学,物理学,生物学,および材料工学において極めて重要です.
- テラヘルツ (THz) 円形二極光学 (TCD) は低周波振動 (0.0010.01 eV) に焦点を当て,分子間運動と結晶構造の洞察を提供します.
背景:
- 伝統的なカイロプティカル・メソッド (ECD,VCD) は,0.1から5.0 eVの電子とビブロニックの移行を分析します.
- THz範囲の低周波振動は,複雑な分子や材料を理解するために不可欠ですが,TCDの方法論とハードウェアが発達していないため,あまり調査されていません.
研究 の 目的:
- テラヘルツ環状二極化 (TCD) スペクトロスコーピーの理論的基礎,実用化,およびアプリケーションを確立する.
- 分子結晶とナノスケールアセンブリの 3D構造と組織に対するTCDの感受性を実証する.
- チラルフォノンのような 新しい物理現象を特定するための TCD の可能性を探求する.
主な方法:
- テラヘルツ環状二極光学 (TCD) の開発と応用.
- TCDのハードウェアと方法論の理論的なモデリングと実践的な実装.
- TCDのスペクトルデータを分析し,ピークサイン,強度,位置,新しいデータ処理技術と共に分析する.
主要な成果:
- TCDのピーク特性は,分子結晶の3次元構造と長距離組織に対して非常に敏感である.
- TCDは (バイオ) 分子,その結晶,ナノスケールアセンブリを成功裏に探査し,詳細な構造情報を明らかにします.
- TCDは,キラルフォノンやナノ構造物質の拡散などの新しい物理現象を特定することができます.
結論:
- TCD光譜は分子,結晶,ナノ材料のキラル構造を研究するためのユニークな能力を提供します.
- この技術は,キラルフォノンの調査と,生物学的およびナノスケールシステムにおけるデータ分析のための機械学習の活用に有望である.
- 生物分子構造におけるTCDピークの感度と鋭さは,技術的な応用のための重要な可能性を示唆しています.
関連する概念動画
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
903
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...
903
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
843
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
843
Raman Spectroscopy: Overview
505
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
505
IR Spectroscopy: Molecular Vibration Overview
2.6K
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
2.6K
2D NMR: Overview of Heteronuclear Correlation Techniques
271
Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an X-nucleus, such as carbon-13 or nitrogen-15. This method is commonly used in nuclear magnetic resonance (NMR) spectroscopy to gain insights into complex chemical compounds' structural and compositional aspects. A typical heteronuclear correlation spectrum displays X-nucleus chemical shifts on one axis and a proton spectrum on the other...
271
UV–Vis Spectroscopy: Molecular Electronic Transitions
1.7K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
1.7K

