アレン系ジルコニウムフォスフォナートの層間領域におけるエクシマーの形成
Jay C Amicangelo1, Willem R Leenstra
1Department of Chemistry, University of Vermont, Burlington, VT 05405, USA.
Journal of the American Chemical Society
|December 4, 2003
まとめ
2つのアレン由来ジルコニウムフォスホネートが研究されました. ナフタレン化合物は,モノマーとエクシマーの光性を示し,アントラゼン化合物は,より大きな染色体の重複により,エクシマーの光性を示しただけです.
科学分野:
- マテリアルサイエンス 材料科学
- フォトケミストリー フォトケミストリー
- 固体化学 固体化学
背景:
- アレーン由来ジルコニウムフォスホネートは,材料科学における潜在的な応用を持つ層状の固体である.
- これらの材料の光物理的性質は,層間領域内の染色体群の配置と相互作用によって影響を受けます.
研究 の 目的:
- 2つのアレン-derivatizedジルコニウムフォスホネートの光物理的行動を調査するために.
- 染色体構造,分子間相互作用,そしてこれらの層状の材料における光放射の関係を理解する.
主な方法:
- アレン由来ジルコニウムフォスフォナートの合成.
- 光スペクトロスコーピーを用いた光物理的特徴付け.
- 染色体の配置と層間空間内の重複の分析.
主要な成果:
- ナフタレンとアントラゼンを含有するジルコニウムフォスフォン酸塩は,両方とも成功裏に合成されました.
- ナフタレンベースの材料は,モノマーとエクシマーの両方の光を示した.
- アントラゼン基の材料は,染色体重複の増加に起因するエクシマー光のみを示した.
結論:
- アレン誘導型ジルコニウムフォスフォナートの光性能は,特定のアレン置換物とその空間的配置に大きく依存しています.
- エクシマーの形成は,これらの層状の材料における光の重要な経路であり,染色体の重なりによる影響を受けます.
関連する概念動画
03:06Alkali Metals
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
02:37Metallic Solids
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
03:45Formation of Complex Ions
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
02:35Energetics of Solution Formation
The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent electrostatic forces to...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent electrostatic forces to...
01:33Regioselective Formation of Enolates
As depicted in the figure below, the unsymmetrical ketones can form two possible enolates: less substituted or more substituted enolates. Usually, the thermodynamic enolates are formed from the more substituted α-carbon atom, while the kinetic enolates are formed faster by deprotonation from the less substituted position. The thermodynamic enolates have lower energy, so they are more stable. But the energy required to form kinetic enolates is less.
01:09Colloidal precipitates
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...