アニオンモジュール:π結合アニオン受容体との組み合わせによる超分子組成の構成要素
Hiromitsu Maeda1, Kazumasa Naritani, Yoshihito Honsho
1College of Pharmaceutical Sciences, Institute of Science and Engineering, Ritsumeikan University, Kusatsu 525-8577, Japan. maedahir@ph.ritsumei.ac.jp
Journal of the American Chemical Society
|May 20, 2011
まとめ
新しいπ結合のアサイクロン受容体とガリックカルボキシラートアニオンモジュールは,超分子組成を形成する. これらの柔らかい材料は,アルキル鎖の長さによって調節される秩序ある構造と電気伝導性を表しています.
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
- オーガニック・ケミストリー オーガニック・ケミストリー
背景:
- ディピロリルジケトンボロン複合体は,π結合アシクリックアニオン受容体として機能する.
- これらの受容体は,非共性相互作用による超分子組成の構成サブユニットとして機能する.
- アニオンモジュールは,建築ブロックとして組み合わされ,多様な柔らかい材料を作成できます.
研究 の 目的:
- ディピロリルジジケトンボロン複合体とガリックカルボキシラート誘導体を用いて超分子組成の形成を調査する.
- アニオンモジュールの自己組み立て能力と,その物質特性への影響について調べる.
- 電気伝導性を有する機能的な材料を製造するために.
主な方法:
- テトラブチラモニウム (TBA) 塩としてのガールカルボキシラート誘導体 (3-n) の合成.
- 受容体-アニオン-モジュール複合体の形成 (1a/1b·3-n·TBA).
- 微分スキャニング熱計,偏光光学顕微鏡,X線微分を用いた特徴化.
主要な成果:
- 受容体-アニオン-モジュール複合体はメソフェーズを形成し,これは熱および光学分析によって示されています.
- X線 difrractionは,固体状態とメソフェーズにおける高度に秩序付けられたラメラ構造を明らかにしました.
- アニオンモジュールのアルキル鎖の長さは,観測された構造を調節した.
- 電気伝導性を有する機能的な材料が製造された.
結論:
- ディピロリルディケトンボロン複合体と特定のアニオンモジュールは,オーダーされた柔らかい材料に自己組み立てることができます.
- アニオンモジュールのアルキル鎖の長さは,超分子構造を調整する手段を提供します.
- このアプローチにより,自己組み立て可能な構成要素から導電性機能材料の製造が可能になります.
関連する概念動画
Aromatic Hydrocarbon Anions: Structural Overview
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous overlap of p...
Due to the absence of continuous overlap of p...
Aromatic Hydrocarbon Cations: Structural Overview
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...
Removing one hydrogen from the intervening CH2 group with both...
Anionic Chain-Growth Polymerization: Overview
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
π Molecular Orbitals of the Allyl Cation and Anion
An allyl group is a three-carbon conjugated system where the sp³-hybridized allylic carbon is bonded to a CH=CH2 group via a single bond. Allyl anions can be obtained by treating propene with a strong base that can deprotonate methyl groups. Allyl cations are formed as intermediates during substitution reactions involving allylic halides. In both cases, the hybridization of the allylic carbon changes from sp3 to sp2, giving rise to a carbon chain with three sp2-hybridized carbons, each with an...
Ion Exchange
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...


