シングルコンポーネントの分子結晶における記録的な高コントラストを示す非線形光学特性
Zhihua Sun1, Tianliang Chen1, Xitao Liu1
1Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, P. R. China.
Journal of the American Chemical Society
|December 1, 2015
まとめ
研究者は,プラスチック・クリスタル材料で非線形光学 (NLO) エフェクトを切り替えることで,記録的な高コントラストを達成しました. このNLOの材料科学の突破は 機能的な材料の新たな可能性をもたらします
科学分野:
- 材料科学
- 光学について
- クリスタルグラフィー
背景:
- 大量非線形光学 (NLO) のスイッチングは,高度なNLO材料にとって極めて重要です.
- 結晶材料で二次的なNLO効果のための高コントラストを達成することは依然として重要な課題です.
研究 の 目的:
- シングルコンポーネントのプラスチック・クリスタルの NLO-スイッチング行動について報告する.
- 観察されたNLOのスイッチの背後にあるメカニズムを明らかにする.
主な方法:
- 2- ((ヒドロキシメチル) 2-ニトロ-1,3-プロパンジールの非線形光学特性を調査した (1).
- NLOのスイッチングを理解するために,プラスチックから硬質への移行中の分子運動を分析した.
主要な成果:
- 化合物 (1) で,少なくとも ~150 の記録的な高コントラストで,超卓越した NLO スイッチング行動が観察されました.
- 段階転換時の同位分子の動きを遅らせることで,スイッチングメカニズムを明らかにした.
結論:
- プラスチック結晶は,交換可能な光電特性を持つ新しい機能的材料を開発するためのユニークなプラットフォームを提供します.
- この発見は,高度なスイッチングコントラストを持つ先進的なNLO材料を設計するための新しい概念的道を開きます.
関連する概念動画
01:16UV–Vis Spectroscopy: Molecular Electronic Transitions
3.5K
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...
3.5K
02:31Phase Transitions
23.7K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
23.7K
01:21Phase Transitions
64
A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
64
02:39Phase Transitions: Melting and Freezing
15.6K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
15.6K
01:58Cooperative Allosteric Transitions
2.8K
2.8K
01:58Cooperative Allosteric Transitions
9.4K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
9.4K