Video Experimental Relacionado

Updated: Mar 17, 2026

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

Síntesis ortogonal de polímeros que contienen información "fácil de leer" utilizando pasos de acoplamiento de

Gianni Cavallo¹, Abdelaziz Al Ouahabi¹, Laurence Oswald¹

¹Precision Macromolecular Chemistry, Institut Charles Sadron, UPR-22 CNRS , BP 84047, 23 rue du Loess, 67034 Strasbourg Cedex 2, France.

Journal of the American Chemical Society

|July 26, 2016

Resumen

Un nuevo método de síntesis de fase sólida crea polímeros codificados en secuencia utilizando fosforamidita iterativa y acoplamiento radical. Esta estrategia permite una síntesis precisa de polímeros y una fácil secuenciación de la información binaria implementada.

Área de la Ciencia:

Química de los polímeros
Síntesis orgánica
Ciencias de los materiales

Sus antecedentes:

El desarrollo de métodos para sintetizar polímeros codificados en secuencia es crucial para los materiales avanzados.
Las técnicas existentes a menudo carecen de precisión o tienen dificultades para implementar secuencias complejas.

Objetivo del estudio:

Introducir una nueva estrategia iterativa ortogonal de fase sólida para la síntesis de polímeros codificados por secuencia.
Demostrar la capacidad de implementar información binaria dentro de las secuencias de polímeros.
Para facilitar la secuenciación directa de los polímeros sintetizados.

Principales métodos:

Se utilizó un proceso quimioselectivo de dos pasos: acoplamiento de fosforamidita y acoplamiento radical-radical.
Se utilizan monómeros de fosforamidita con bromuro de alquilo y bloques de construcción de nitróxido funcionalizado con hidróxido.
Oxidación in situ y generación de radicales mediada por bromuro de cobre con captura de espín de óxido.

Principales resultados:

Polímeros uniformes sintetizados con éxito, confirmados por la espectrometría de masas de electrospray de alta resolución.
Demostró la fácil implementación de la información binaria mediante el uso de diversos monómeros de fosforamidita.
Mostró una fácil secuenciación de polímeros a través de la espectrometría de masas en tándem debido a los enlaces de alkoxiamina descifrables.

Conclusiones:

La estrategia iterativa ortogonal de fase sólida propuesta es efectiva para sintetizar polímeros codificados por secuencia.
Este método permite un control preciso de la secuencia del polímero y la incorporación de información.
Los polímeros resultantes se secuencian fácilmente, ofreciendo ventajas significativas para la caracterización y la aplicación.

Más Videos Relacionados

Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism

Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism

Published on: July 28, 2017

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

Published on: September 21, 2017

Videos de Conceptos Relacionados

Radical Chain-Growth Polymerization: Mechanism

Radical Chain-Growth Polymerization: Mechanism

The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this species into...

Radical Chain-Growth Polymerization: Overview

Radical Chain-Growth Polymerization: Overview

Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...

ATP and Macromolecule Synthesis

ATP and Macromolecule Synthesis

Biological macromolecules are organic compounds, predominantly composed of carbon atoms. The carbon atoms are covalently bonded with hydrogen, oxygen, nitrogen, and other minor elements. There are four major biological macromolecule classes: carbohydrates, lipids, proteins, and nucleic acids.
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...

Radical Chain-Growth Polymerization: Chain Branching

Radical Chain-Growth Polymerization: Chain Branching

The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...

Free-Radical Chain Reaction and Polymerization of Alkenes

Free-Radical Chain Reaction and Polymerization of Alkenes

The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.

Olefin Metathesis Polymerization: Overview

Olefin Metathesis Polymerization: Overview

Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...