MII4L6ケージ・フレームワーク内のゲストへの興奮エネルギー移転と転送
Andrew J Musser1,2, Prakash P Neelakandan3, Johannes M Richter1
1Cavendish Laboratory, University of Cambridge , JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
Journal of the American Chemical Society
|July 29, 2017
まとめ
研究者はBODIPYを含む新型の四面体ケージを作りました これらのケージは,以前のケージ設計と異なるユニークなエキソトニックの相互作用と興奮状態の移転を示し,フルレンをカプセル化すると光物理的性質が変化します.
科学分野:
- 超分子化学
- フォト物理学
- 材料科学
背景:
- MII4L6の四面体ケージは 超分子構造で多用途です
- BODIPY染料は,調節可能な光物理的性質を持つ染色体として広く使用されています.
- 複雑な分子構造における興奮状態のダイナミクスを理解することは,材料設計において極めて重要です.
研究 の 目的:
- 異なるBODIPY部分を含むMII4L6四面体ケージを合成し,特徴づけること.
- これらのケージとそのフルレンの添加物の光物理的性質を調査する.
- エキサイテッド状態のダイナミクスとケージシステム内の電子相互作用を明らかにする.
主な方法:
- BODIPYリガンドによるMII4L6四面体ケージの合成
- 光学物理的特性を探求するためのスペクトロスコーピック研究 (吸収,放出,一時的吸収).
- 電子デロカライゼーションとインタラクションを理解するための計算モデリング.
主要な成果:
- BODIPYユニット間の強い刺激相互作用によって置き換えられた.
- このようなケージの新鮮な特徴である金属センターを通じた興奮状態の移転の観察.
- 移行二極相互作用によって導かれる一貫した興奮状態の進行 (I → II → III).
- フラーレンで封じ込められたケージで 宿主から宿主への超高速の電子移転が 刺激的相互作用と競合します
結論:
- 設計されたケージは独特のエキソニックカップリングと興奮状態の移転を示しています.
- フラーレンの封じ込めは,電子移転によって興奮状態のダイナミクスを大幅に変化させます.
- これらの発見は,高度な機能的な超分子材料の設計に洞察を与えます.
さらに関連する動画
08:04Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
Published on: May 27, 2020
9.0K
10:29Multi-photon Intracellular Sodium Imaging Combined with UV-mediated Focal Uncaging of Glutamate in CA1 Pyramidal Neurons
Published on: October 8, 2014
14.6K
関連する概念動画
01:37Energy to Drive Translocation
2.9K
Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
Generally, polypeptides are unfolded by two distinct...
Generally, polypeptides are unfolded by two distinct...
2.9K
01:25Deactivation Processes: Jablonski Diagram
2.0K
Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
2.0K
02:58Crystal Field Theory - Octahedral Complexes
31.2K
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...
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...
31.2K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
49.0K
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,...
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,...
49.0K
01:21Molecular Kinetic Energy
5.8K
The word "gas" comes from the Flemish word meaning "chaos," first used to describe vapors by the chemist J. B. van Helmont. Consider a container filled with gas, with a continuous and random motion of molecules. During collisions, the velocity component parallel to the wall is unchanged, and the component perpendicular to the wall reverses direction but does not change in magnitude. If the molecule’s velocity changes in the x-direction, then its momentum is changed.
5.8K
03:25Free Energy Changes for Nonstandard States
13.7K
The free energy change for a process taking place with reactants and products present under nonstandard conditions (pressures other than 1 bar; concentrations other than 1 M) is related to the standard free energy change according to this equation:
13.7K