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Ion Exchange01:17

Ion Exchange

1.1K
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...
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Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Basicity of Heterocyclic Aromatic Amines01:25

Basicity of Heterocyclic Aromatic Amines

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Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
6.8K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.4K
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,...
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

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スイッチ可能なアニオンの好みを持つ尿基のインプリントポリマーホスト

Sudhirkumar Shinde1,2, Anil Incel1, Mona Mansour1

  • 1Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden.

Journal of the American Chemical Society
|May 20, 2020
PubMed
まとめ
この要約は機械生成です。

この研究では,小分子変形剤を用いて,フォスフォナートまたはスルフォナートイオンに切り替え可能なポリマー (MIP) が導入されます. これらの高度な受容体は,宿主-ゲスト化学におけるアニオン認識のための調整可能な選択性を提供します.

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Synthesis of PolyN-isopropylacrylamide Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability
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Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization
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Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization

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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Synthesis of PolyN-isopropylacrylamide Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability
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Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization
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科学分野:

  • ホスト・ゲストの化学関係
  • 超分子化学
  • ポリマー科学

背景:

  • 交換可能なイオン偏好を持つ人工受容体の設計は大きな課題です.
  • 分子インプリントポリマー (MIP) は分子認識のための多用途のプラットフォームを提供します.

研究 の 目的:

  • オキシアニオンに対する外部の切り替え可能な偏好値を開発する.
  • これらの新しいポリマーのインプリントメカニズムと結合特性を調査する.

主な方法:

  • 機能的宿主モノマーを用いた水素結合媒介のインプリント.
  • 相互作用の解明のためのH NMRタイトレーションとH-NOESY.
  • 分子ダイナミックシミュレーションと 機械学的洞察のための染色体研究

主要な成果:

  • MIPはフェニルフォスフォン酸 (PPA) とフェニル硫酸 (PSA) の選択的結合を示した.
  • 変形剤の酸性を変化させることで,スルフォナート対スルフォナートの交互性クロマトグラフィック保持性が得られた.
  • 高級複合体の形成と模板誘発のダイアドの重複がポリマー骨格で観察された.

結論:

  • 開発されたMIPは,外部スイッチを通じてオキシアニオンの選択性を示す.
  • この研究は,ポリマーの構成および構成インプリントに関する機械的洞察を提供します.
  • この研究は,アニオン認識のためのインテリジェントホスト・ゲストシステムの設計を進めている.