Issue 14, 2018

Facilely prepared blue-green light sensitive curcuminoids with excellent bleaching properties as high performance photosensitizers in cationic and free radical photopolymerization

Abstract

Curcumin is attractive in photopolymerization especially in cationic photopolymerization, because of its broad absorption and nontoxic properties. Curcuminoid (CMD) is a linear diarylheptanoid and can be considered as a derivative of curcumin. Based on the framework of curcumin, four CMDs containing carbazole/triphenylamine/dimethylaniline/phenothiazine as electron donors and β-diketone as electron acceptors are prepared using a facile synthesis method. The absorption maxima of the prepared CMDs all showed significant red-shifts compared with that of curcumin. The CMDs can act as high performance photosensitizers of iodonium salt (ONI) to start the ring-opening cationic photopolymerization of epoxides and the free radical photopolymerization of acrylates upon blue-green light exposure using light-emitting diodes. Excellent polymerization initiating efficiencies are found, and high final function conversions are obtained. The initiating abilities of the CMDs/ONI can be enhanced in the presence of N-vinyl carbazole or triphenylphosphine. More remarkably, the CMDs/ONI exhibit excellent photobleaching properties, and can be used in deep free radical photopolymerization.

Graphical abstract: Facilely prepared blue-green light sensitive curcuminoids with excellent bleaching properties as high performance photosensitizers in cationic and free radical photopolymerization

Supplementary files

Article information

Article type
Paper
Submitted
29 Jan 2018
Accepted
07 Mar 2018
First published
07 Mar 2018

Polym. Chem., 2018,9, 1787-1798

Facilely prepared blue-green light sensitive curcuminoids with excellent bleaching properties as high performance photosensitizers in cationic and free radical photopolymerization

W. Han, H. Fu, T. Xue, T. Liu, Y. Wang and T. Wang, Polym. Chem., 2018, 9, 1787 DOI: 10.1039/C8PY00166A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements