ゲスト無料のゲルマニウムクラスレート
Arnold M Guloy1, Reiner Ramlau, Zhongjia Tang
1Max-Planck-Institut für Chemische Physik fester Stoffe, 01187 Dresden, Germany. grin@cpfs.mpg.de
Nature
|September 22, 2006
まとめ
研究者は,空のクラスラートII構造を持つゲストフリーゲルマニウムクラスラートを合成しました. このゲルマニウムフレームワーク合成の突破は,先進的な半導体材料と光電子装置の扉を開く.
科学分野:
- マテリアルサイエンス 材料科学
- 固体化学 固体化学
- ナノテクノロジー ナノテクノロジー
背景:
- 拡張半導体フレームワークをケージのような構造で合成することは,継続的な課題を提示します.
- ゲルマニウムとシリコンのフレームワーク構造は,熱電,超伝導,コンドー断熱器のアプリケーションに興味があります.
- シリコンとゲルマニウムの空のフレームワーク構造は,光電子機器に適した広い光学帯域を備えていると予測されています.
研究 の 目的:
- 空のクラスラートII構造を持つゲストフリーゲルマニウムクラスラートの高収量合成について報告する.
- 極性金属間相を合成するためのイオン性液体の可能性を調査する.
主な方法:
- 環境条件下におけるイオン性液中のZintlアニオンの酸化.
- 合成されたゲルマニウムクラスレートII構造の特徴.
主要な成果:
- 空のクラスレートII構造でゲルマニウムの高収量合成を成功させた.
- 極性金属間相の反応のための効果的な媒介としてのイオン液体の実証.
結論:
- ゲストフリーゲルマニウムクラトラートIIの合成は,今や実現可能である.
- この方法は,光電子工学およびその他のアプリケーションのための新しいゲルマニウムベースの材料を開発するための有望な経路を提供します.
関連する概念動画
Electron Configuration of Multielectron Atoms
The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
Noble Gases
The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.
Predicting Molecular Geometry
VSEPR Theory for Determination of Electron Pair Geometries
Ionic 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...
Crystal 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...
Imperfections in Crystal Structure: Stoichiometric Point Defects
Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...


