関連する実験動画
Updated: May 14, 2026
11:27
Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
56リング,64リング,72リングのチャネルを備えた結晶無機フレームワーク
Hsin-Yau Lin1, Chih-Yuan Chin, Hui-Lin Huang
1Department of Chemistry, Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, Taiwan.
Science (New York, N.Y.)
|January 26, 2013
まとめ
研究者は,テンプレッティング方法を組み合わせて,調整可能な超大孔を持つ新しい結晶の多孔性材料を開発しました. このブレークスルーにより,高度な無機のフレームワークで毛穴の大きさを正確に制御することができます.
科学分野:
- マテリアルサイエンス 材料科学
- 無機化学 無機化学とは
- ナノテクノロジー ナノテクノロジー
背景:
- 超大孔を持つゼオライトのような構造 (> 12 環, 12R) は,結晶形に合成することが困難である.
- 現在の方法では,より小さな孔を持つ結晶性材料か,より大きな孔を持つ非結晶性材料のいずれかを得ることが多い.
研究 の 目的:
- システマティックに調整可能な超大孔を持つ結晶の多孔性の無機フレームワークを作成するための合成戦略を開発する.
- フォトルミネスセンスのようなアプリケーションのためのこれらの材料の潜在能力を探求する.
主な方法:
- ゼオライトとメソポラスシリカのテンプレートメカニズムを単一の合成システムに統合.
- ガリウム亜鉛ホスフィートのフレームワークの合成.
- 毛孔の大きさと光発光特性に関する特徴.
主要な成果:
- ガリウム亜鉛ホスフィートの24Rから72Rまでのチャネルサイズの体系的なチューニングを達成しました.
- Mn2+) ドーピングによる白光の光発光の生成が実証された.
- 材料は低熱安定性を示し,テンプレート剤を保持した.
結論:
- 調整可能なマイクロおよびメソポールの結晶性多孔性材料のための実行可能な設計戦略が確立されました.
- 合成された材料は,光電子アプリケーションの潜在能力を示しています.
- 熱安定性を改善するためにさらなる研究が必要である.
関連する概念動画
02:42Ionic Crystal Structures
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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...
01:24The Seven Crystal Systems: Overview
Crystals with various point group symmetries belong to different crystal classes, which are synonymous terms. Despite being in the same class, crystals may have distinct shapes, like cubes and octahedra. There are 32 three-dimensional point groups, all of which are systematically divided into seven crystal systems.The basic cubic crystal system, exemplified by NaCl, features orthogonal vectors (α = β = �� = 90°) of equal lengths (a = b = c). When specific requirements are not imposed on the...
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
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,...
02:22Structures of Solids
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
02:58Crystal Field Theory - Octahedral Complexes
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...