Near Infrared Light Induced Radical Polymerization in Water.
Angew Chem Int Ed Engl
; 61(42): e202209177, 2022 10 17.
Article
en En
| MEDLINE
| ID: mdl-35945906
ABSTRACT
We introduce a gold nanorod (AuNR) driven methodology to induce free radical polymerization in water with near infrared light (800â
nm). The process exploits photothermal conversion in AuNR and subsequent heat transfer to a radical initiator (here azobisisobutyronitrile) for primary radical generation. A broad range of reaction conditions were investigated, demonstrating control over molecular weight and reaction conversion of dimethylacrylamide polymers, using nuclear magnetic resonance spectroscopy. We underpin our experimental data with finite element simulation of the spatio-temporal temperature profile surrounding the AuNR directly after femtosecond laser pulse excitation. Critically, we evidence that polymerization can be induced through biological tissues given the enhanced penetration depth of the near infrared light. We submit that the presented initiation mechanism in aqueous systems holds promise for radical polymerization in biological environments, including cells.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Agua
/
Nanotubos
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Año:
2022
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
ALEMANHA
/
ALEMANIA
/
DE
/
DEUSTCHLAND
/
GERMANY