固体中の金属カチオンを使用して,光学的に活性なポリ ((フェニルアセチレン) デリバートのヘリシティ制御に基づく3つの状態の切り替え可能なキラル静止相
Daisuke Hirose1,2, Asahi Isobe2, Emilio Quiñoá3
1WPI Nano Life Science Institute (WPI-NanoLSI) , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan.
Journal of the American Chemical Society
|May 8, 2019
まとめ
高性能液体クロマトグラフィー (HPLC) 向けに,切り替え可能なヘリカルポリマーを用いた新しいキラル静止相 (CSP) が開発された. このダイナミックなCSPは,その螺旋構造を変えて,キラル認識の研究を助けることによって,エナンティオメアの流出順を変更することができます.
科学分野:
- ポリマー化学
- 分析化学
- 染色学
背景:
- チラル静止相 (CSP) は,高性能液体染色学 (HPLC) のエナティオメール分離に不可欠である.
- CSPの二次構造を制御することで,キラル認識メカニズムに影響を与えることができます.
- 既存の方法はしばしば移動的相または添加的変化を含み,構造的効果の分離を複雑にする.
研究 の 目的:
- HPLCのための前例のない3つの状態のスイッチ可能なキラル静止相 (CSP) を開発する.
- ダイナミックな二次構造の変化がエナティオメルのエリューション順に与える影響を調査する.
- モバイル・フェーズまたは添加物による変更から独立したキラル認識を証明する.
主な方法:
- キラルペンダントグループ (ポリ-1) を有する螺旋型ポリ ((フェニルアセチレン) の合成.
- 特定の金属テトラキス[3,5-ビス]トリフルオロメチルフェニル]ボレート塩 (MBArF) を使用して,左側と右側の螺旋形状の誘導.
- メタノールで洗浄し,HPLC条件下で適切なMBArF塩 (ヘクサン-2-プロパノール) を加える.
主要な成果:
- ポリ 1 基の 3 状態切り替え可能なキラル静止相 (CSP) を成功裏に開発した.
- CSPの螺旋形状 (右利き,左利き,ラセミック) を変化させることで,エナティオメルの流出順が変化することを示した.
- ポリマーの二次構造を切り替えることで,エナティオメルの溶解順序の逆転が観察される.
結論:
- 開発されたダイナミック・ヘリカル・CSPは,キラル認識を制御するための新しいアプローチを提供します.
- キラルポリマーの二次構造方向の変化は,エナティオメールの分離に直接影響する.
- この方法は,HPLCにおけるキラル認識メカニズムを研究するための強力なツールを提供します.
さらに関連する動画
10:17Switchable Acoustic and Optical Resolution Photoacoustic Microscopy for In Vivo Small-animal Blood Vasculature Imaging
Published on: June 26, 2017
12.4K
09:22Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
8.2K
関連する概念動画
02:37Metallic Solids
20.5K
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....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.5K
01:17Gas Chromatography: Types of Columns and Stationary Phases
2.3K
Gas chromatography (GC) relies on stationary phases to separate and analyze components in a sample. There are two main types of stationary phases: liquid and solid. Liquid stationary phases are non-volatile, thermally stable, and chemically inert liquids coated onto the column. Solid stationary phases are particles of adsorbent material, such as silica gel or molecular sieves.
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...
2.3K
02:32Bonding in Metals
52.2K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
52.2K
01:22Phase-lead and Phase-lag Controllers
541
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
541
02:25Chirality
29.3K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
29.3K
03:06Alkali Metals
24.3K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
24.3K