Video Experimental Relacionado

Updated: Feb 2, 2026

Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications

Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications

Published on: February 7, 2021

Hidrogeles de ADN supramolecular/bipiridinio dietienileto accionados por luz, redox y estímulos químicos para

Ziyuan Li¹, Gilad Davidson-Rozenfeld², Margarita Vázquez-González²

¹Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering , East China University of Science & Technology , 130 Meilong Road , Shanghai , 200237 , China.

Journal of the American Chemical Society

|November 20, 2018

Resumen

Los nuevos hidrogeles basados en carboximetilcelulosa (CMC) utilizan agentes de luz y redox para controlar la rigidez. Estos materiales multi-activados exhiben memoria de forma y propiedades de auto-reparación para aplicaciones avanzadas.

Área de la Ciencia:

Ciencias de los materiales
Química de los polímeros
Química supramolecular

Sus antecedentes:

Los hidrogeles sensibles a estímulos ofrecen propiedades sintonizables para aplicaciones avanzadas.
La fotoisomerización del DTE permite la conmutación molecular desencadenada por la luz.
Las interacciones supramoleculares, como el donante-aceptor y los cuádruplexos G, pueden formar redes reversibles de hidrogel.

Objetivo del estudio:

Desarrollar hidrogeles multi-activados y sensibles a los estímulos basados en carboximetilcelulosa (CMC).
Para diseñar hidrogeles con rigidez conmutable, memoria de forma y capacidades de auto-curación.
Para explorar el uso de la fotoisomerización de DTE y G-cuadruplexos como desencadenantes.

Principales métodos:

Síntesis de hidrogeles basados en CMC que incorporan dopamina y ácidos nucleicos.
Incorporación de DTE para cambios de rigidez inducidos por la fotoisomerización.
Utilizando cuadruplexos G estabilizados con K+ y éter de corona para el enlace cruzado reversible.

Principales resultados:

Se han desarrollado hidrogeles de activación dual y múltiple con rigidez conmutable mediante luz, agentes redox o éter K+/corona.
Transiciones reversibles demostradas entre estados de alta y baja rigidez.
Muestra memoria de forma y propiedades de autocuración en hidrogeles híbridos de donante-aceptor/G-cuadruplex.

Conclusiones:

Los hidrogeles basados en CMC con múltiples disparadores ofrecen un control preciso de las propiedades del material.
La estrategia de enlace híbrido permite funcionalidades avanzadas como la memoria de forma y la autocuración.
Estos materiales son prometedores para aplicaciones que requieren materiales blandos ajustables y sensibles.

Más Videos Relacionados

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

Shape Memory Polymers for Active Cell Culture

Shape Memory Polymers for Active Cell Culture

Published on: July 4, 2011

Videos de Conceptos Relacionados

Balancing Redox Equations

Balancing Redox Equations

Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...

Redox Reactions

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...

Redox Reactions

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...

Molecular Shapes

Molecular Shapes

Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.
Two regions of electron density in a diatomic...

Chemical Formulas

Chemical Formulas

A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural.

DNA Isolation

DNA Isolation

DNA from cells is required for many biotechnology and research applications, such as molecular cloning. To remove and purify DNA from cells, researchers use various methods of DNA extraction. While the specifics of different protocols may vary, some general concepts underlie the process of DNA extraction.