编程从树突性二酸中自组装的螺旋孔的内部结构和稳定性,通过酸的保护组通过酸的保护组
Virgil Percec1, Andrés E Dulcey, Mihai Peterca
1Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA. percec@sas.upenn.edu
Journal of the American Chemical Society
|December 15, 2005
概括
研究人员合成了树突型二,并研究了它们的自我组装成螺旋状多孔结构. 双的保护组精确控制了孔径尺寸和稳定性,为超分子材料提供了一个简单的设计策略.
科学领域:
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
- 有机合成 有机合成
背景情况:
- 树突分子为自我组装提供了独特的特性.
- 控制超分子组件的结构对于材料设计至关重要.
- 二可以作为构建复杂树突结构的基石.
研究的目的:
- 为了合成新的树突性二.
- 为了研究这些二在散装和溶液中的自我组装行为.
- 分析由此产生的超分子螺旋多孔组件的结构和逆结构性质.
主要方法:
- 具有不同保护组 (Boc, Moc, Ac) 的树突二的合成.
- 大量和溶液相自组装实验.
- 使用先进技术对超分子螺旋孔的结构和逆结构分析.
主要成果:
- 成功合成了树突性二 (4-3,4-3,5) 12G2-CH2-X-L-Tyr-L-Ala-OMe的成功合成.
- 证明了自我组装成超分子螺旋状多孔结构.
- 保护组 (X) 的性质决定了螺旋孔和树突的尺寸,结构,内部秩序,热稳定性和构造.
结论:
- 双上的保护组是一种简单而有效的策略,用于编程超分子螺旋孔结构.
- 这种方法补充了涉及树突架构和立体化学的复杂设计策略.
- 为设计具有可调节性质的有序多孔材料提供了一种简单的方法.
相关概念视频
Protein Organization
Overview
Protein Folding
Overview
Structures of Carboxylic Acid Derivatives
Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
Protein Organization
Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
The primary structure of a protein is its amino acid sequence.
Protein Folding
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Structure of Porins
Mitochondria, chloroplasts, and gram-negative bacteria have transmembrane, beta-barrel proteins called porins to mediate the free diffusion of ions and metabolites across the membrane. Mitochondrial porin precursors contain conserved amino acid sequences called beta signals at their C-terminal. Beta signals have a motif of PoXGXXHyXHy (Po-Polar, X-Any amino acid, G-Glycine, Hy-LargeHydrophobic), which are crucial for precursor recognition to initiate precursor assembly. Beta-barrel precursors...


