Work

Photochromic carbazole photoinitiators for precision visible‐light photopolymerization

Year: 2026

Type: article

Abstract: Two carbazole derivatives, each incorporating a naphthopyran unit and an aromatic ketone, were synthesized and evaluated as photoinitiators for radical photopolymerization. Upon visible laser irradiation, these initially colorless photo‐ and thermochromic compounds undergo a reversible ring‐opening reaction to generate colored benzophenone derivatives, which, in the presence of a co‐initiator, efficiently trigger localized radical polymerization of a tetraacrylate monomer. This approach allows the rapid and precise fabrication of thin solid objects with well‐defined geometries using visible light. © 2026 The Author(s). Polymer International published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

Source: Polymer International

DOI: 10.1002/pi.70098

Authors: Mauro Magalhães, Céu M Sousa, José R Fernandes, Paulo J Coelho

Institution: University of Trás-os-Montes and Alto Douro

Language: English

Topic: Photopolymerization techniques and applications

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,890

Funder: Fundação para a Ciência e a Tecnologia