NDLI: Utilizing the electron transfer mechanism of chlorophyll a under light for controlled radical polymerization

Content Provider	Royal Society of Chemistry (RSC)
Author	Xu, Jiangtao Boyer, Cyrille Shanmugam, Sivaprakash
Copyright Year	2015
Abstract	Efficient photoredox catalysts containing transition metals, such as iridium and ruthenium, to initiate organic reactions and polymerization under visible light have recently emerged. However, these catalysts are composed of rare metals, which limit their applications. In this study, we report an efficient photoinduced living radical polymerization process that involves the use of chlorophyll as the photoredox biocatalyst. We demonstrate that chlorophyll a (the most abundant chlorophyll in plants) can activate a photoinduced electron transfer (PET) process that initiates a reversible addition-fragmentation chain transfer (RAFT) polymerization under blue and red LED light (λmax = 461 and 635 nm, respectively). This process controls a wide range of functional and non-functional monomers, and offers excellent control over molecular weights and polydispersities. The end group fidelity was demonstrated by NMR, UV-vis spectroscopy, and successful chain extensions for the preparation of diblock copolymers.
Starting Page	1341
Ending Page	1349
Page Count	9
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	6
Issue Number	2
Journal	Chemical Science
DOI	10.1039/c4sc03342f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Chlorophyll Chain transfer Ruthenium Ultraviolet\u2013visible spectroscopy Enzyme Living polymerization Radical polymerization Photoinduced electron transfer Polyethylene terephthalate Iridium Nuclear magnetic resonance
Content Type	Text
Resource Type	Article
Subject	Chemistry

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