Enhancing Temporal Control and Enabling Chain-End Modification in Photoregulated Cationic Polymerizations by Using Iridium-Based Catalysts

Angewandte Chemie
Veronika KottischBrett P Fors

Abstract

Gaining temporal control over chain growth is a key challenge in the enhancement of controlled living polymerizations. Though research on photocontrolled polymerizations is still in its infancy, it has already proven useful in the development of previously inaccessible materials. Photocontrol has now been extended to cationic polymerizations using 2,4,6-triarylpyrylium salts as photocatalysts. Despite the ability to stop polymerization for a short time, monomer conversion was observed over long dark periods. Improved catalyst systems based on Ir complexes give optimal temporal control over chain growth. The excellent stability of these complexes and the ability to tune the excited and ground state redox potentials to regulate the number of monomer additions per cation formed allows polymerization to be halted for more than 20 hours. The excellent stability of these iridium catalysts in the presence of more nucleophilic species enables chain-end functionalization of these polymers.

References

Jan 1, 1990·Advances in Biophysics·D L Caspar, K Namba
May 19, 2005·Journal of the American Chemical Society·Jonas I GoldsmithStefan Bernhard
Feb 10, 2009·Journal of the American Chemical Society·Shigeru YamagoYasuyuki Nakamura
Apr 2, 2011·Science·Andrew J D MagenauKrzysztof Matyjaszewski
May 25, 2011·Journal of the American Chemical Society·Erin M BroderickPaula L Diaconescu
Mar 15, 2012·Journal of the American Chemical Society·Yasuyuki NakamuraShigeru Yamago
Jul 19, 2012·Angewandte Chemie·Brett P Fors, Craig J Hawker
Nov 21, 2012·Angewandte Chemie·Frank A LeibfarthCraig J Hawker
Mar 21, 2013·Chemical Reviews·Christopher K PrierDavid W C MacMillan
Oct 1, 2013·Journal of the American Chemical Society·Ashley B BiernesserJeffery A Byers
Dec 17, 2014·Angewandte Chemie·Mineto UchiyamaMasami Kamigaito
Jan 13, 2015·Journal of the American Chemical Society·Kelli A OgawaAndrew J Boydston
Jul 15, 2015·Journal of the American Chemical Society·Sivaprakash ShanmugamCyrille Boyer
Mar 16, 2016·Chemical Reviews·Mao ChenJeremiah A Johnson
Apr 2, 2016·Science·Jordan C TheriotGarret M Miyake
May 12, 2016·Chemical Communications : Chem Comm·Changkui FuCyrille Boyer
May 18, 2016·Journal of the American Chemical Society·Glen R JonesDavid M Haddleton
Jun 1, 2016·Journal of the American Chemical Society·Marco FantinKrzysztof Matyjaszewski
Nov 8, 2016·Chemical Society Reviews·Nathaniel CorriganCyrille Boyer
Dec 10, 2016·Journal of the American Chemical Society·Veronika KottischBrett P Fors
Feb 15, 2017·Macromolecular Rapid Communications·Laura M M PascualAndrew J Boydston
Mar 10, 2017·Angewandte Chemie·Quentin MichaudelBrett P Fors
Jul 27, 2017·Journal of the American Chemical Society·Veronika KottischBrett P Fors
Oct 7, 2017·Journal of the American Chemical Society·Quentin MichaudelBrett P Fors
Feb 1, 2018·Journal of the American Chemical Society·Brian M PetersonBrett P Fors
Aug 31, 2018·Nature Reviews. Drug Discovery·Vincenzo Di Marzo

❮ Previous
Next ❯

Citations

Nov 11, 2019·Nature Communications·Marc R BeckerCorinna S Schindler
Dec 20, 2018·Chemical Communications : Chem Comm·Sajjad Dadashi-SilabKrzysztof Matyjaszewski
Aug 21, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Jia-Wei LiuWei Huang
Oct 27, 2020·Advanced Science·Mitchell D NothlingGreg G Qiao
Feb 23, 2020·Chemical Reviews·Yin-Ning ZhouZheng-Hong Luo
May 11, 2021·Macromolecular Rapid Communications·Yinan ChenMao Chen
Sep 29, 2020·Journal of the American Chemical Society·Travis P VarnerFrank A Leibfarth

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Journal of the American Chemical Society
Veronika KottischBrett P Fors
Journal of the American Chemical Society
Veronika KottischBrett P Fors
Journal of the American Chemical Society
Quentin MichaudelBrett P Fors
Journal of the American Chemical Society
Nicolas J TreatCraig J Hawker
© 2022 Meta ULC. All rights reserved