関連する実験動画
Updated: Jul 27, 2026

16:24
Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
Published on: August 2, 2012
巨大な超分子液晶格子である
Goran Ungar1, Yongsong Liu, Xiangbing Zeng
1Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, UK. g.ungar@shef.ac.uk
まとめ
研究者らは,自己組み立ての超分子デンドリマーによって形成された複雑な液晶相を発見した. この発見は,電子と触媒のための高度な有機ナノ構造物の設計を進めています.
科学分野:
- 超分子化学とは
- マテリアルサイエンス 材料科学
- 液晶は液体結晶である.
背景:
- 自己組織化された超分子有機ナノ構造は,分子電子,光学,ナノ孔性の触媒にとって極めて重要です.
- 分子構造を通して自己組み立てを制御することは,複雑なナノ構造物の設計の鍵です.
研究 の 目的:
- 新しく複雑な液晶相を報告する.
- 超分子 dendrimersの自己組み立てを調査するために.
- デンドリット積層の配置モデルを提案する.
主な方法:
- 超分子デンドリマーの合成と特徴付け.
- 液晶相分析. 液晶相分析. 液晶相分析. 液晶相分析. 液晶相分析. 液晶相分析. 液晶相分析. 液晶相分析. 液晶相分析. 液晶相分析.
- 構造モデリング.
主要な成果:
- 四角三次元単体細胞を持つ液晶相を発見した.
- 単細胞あたり30個の球状上分子デンドリマーの観察.
- 各デンドリマーは,12個のデンドロン分子から自己組織化されます.
結論:
- 報告された液晶相は,これまでに発見された中で最も複雑である.
- 分子構造と温度に基づいた dendritic agregates の空間的配置を説明するモデルが提案されました.
- この研究は,より洗練された超分子ナノ構造物の設計を可能にします.
関連する概念動画
Structures 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...
Molecular and Ionic Solids
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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...
Lattice Centering and Coordination Number
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Types of Unit Cells
Imagine taking a large number of identical...
Unit Cells
A crystal's internal structure is an orderly array of atoms, ions, or molecules, and the details of this array significantly influence the solid's properties. In a crystal, periodically repeating 'structural motifs' - which could be atoms, molecules, or groups thereof - create a 'space lattice.' This is essentially a three-dimensional, infinite array of points, each surrounded by its neighbors in an identical way, forming the basic structure of the crystal.A 'unit cell' is a theoretical...
Crystal Density
The crystal lattice structure of a material allows us to determine how many molecules exist in its unit cell. With this information, alongside the unit-cell parameters - three distance parameters (a, b, c) and three angular parameters (α, β, γ).Density (ρ) = (Z × M) / (a × b × c × NA)where:Z is the number of formula units per unit cellM is the molar mass of the substancea, b, and c are the edge lengths of the unit cellNA is Avogadro’s numberFor a simple cubic lattice, atoms are located only at...

