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Showing 1 to 12 of 13 entries
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Controlled Cationic Polymerization: Single-Component Initiation under Ambient Conditions.

Journal of the American Chemical Society

Kottisch V, O'Leary J, Michaudel Q, Stache EE, Lambert TH, Fors BP.
PMID: 31240909
J Am Chem Soc. 2019 Jul 10;141(27):10605-10609. doi: 10.1021/jacs.9b04961. Epub 2019 Jul 01.

Cationic polymerizations provide a valuable strategy for preparing macromolecules with excellent control but are inherently sensitive to impurities and commonly require rigorous reagent purification, low temperatures, and strictly anhydrous reaction conditions. By using pentacarbomethoxycyclopentadiene (PCCP) as the single-component initiating...

Hydrogen Bond Donor Catalyzed Cationic Polymerization of Vinyl Ethers.

Angewandte Chemie (International ed. in English)

Kottisch V, Jermaks J, Mak JY, Woltornist RA, Lambert TH, Fors BP.
PMID: 33137229
Angew Chem Int Ed Engl. 2021 Feb 23;60(9):4535-4539. doi: 10.1002/anie.202013419. Epub 2020 Dec 14.

The synthesis of high-molecular-weight poly(vinyl ethers) under mild conditions is a significant challenge, since cationic polymerization reactions are highly sensitive to chain-transfer and termination events. We identified a novel and highly effective hydrogen bond donor (HBD)-organic acid pair that...

What happens in the dark? Assessing the temporal control of photo-mediated controlled radical polymerizations.

Journal of polymer science. Part A, Polymer chemistry

Dolinski ND, Page ZA, Discekici EH, Meis D, Lee IH, Jones GR, Whitfield R, Pan X, McCarthy BG, Shanmugam S, Kottisch V, Fors BP, Boyer C, Miyake GM, Matyjaszewski K, Haddleton DM, de Alaniz JR, Anastasaki A, Hawker CJ.
PMID: 31011240
J Polym Sci A Polym Chem. 2019 Feb 01;57(3):268-273. doi: 10.1002/pola.29247. Epub 2018 Nov 08.

A signature of photo-mediated controlled polymerizations is the ability to modulate the rate of polymerization by turning the light source 'on' and 'off.' However, in many reported systems, growth can be reproducibly observed during dark periods. In this study,...

Photocontrolled Interconversion of Cationic and Radical Polymerizations.

Journal of the American Chemical Society

Kottisch V, Michaudel Q, Fors BP.
PMID: 28745047
J Am Chem Soc. 2017 Aug 09;139(31):10665-10668. doi: 10.1021/jacs.7b06661. Epub 2017 Jul 27.

The ability to combine two polymerization mechanisms in a one-pot setup and switch the monomer selectivity via an external stimulus provides an excellent opportunity to control polymer sequence and structure. We report a strategy that enables monomer incorporation to...

Cationic Polymerization: From Photoinitiation to Photocontrol.

Angewandte Chemie (International ed. in English)

Michaudel Q, Kottisch V, Fors BP.
PMID: 28277625
Angew Chem Int Ed Engl. 2017 Aug 07;56(33):9670-9679. doi: 10.1002/anie.201701425. Epub 2017 Jun 30.

During the last 40 years, researchers investigating photoinitiated cationic polymerizations have delivered tremendous success in both industrial and academic settings. A myriad of photoinitiating systems have been developed, thus allowing polymerization of a broad array of monomers (e.g., epoxides,...

Cationic Polymerization of Vinyl Ethers Controlled by Visible Light.

Journal of the American Chemical Society

Kottisch V, Michaudel Q, Fors BP.
PMID: 27934022
J Am Chem Soc. 2016 Dec 07;138(48):15535-15538. doi: 10.1021/jacs.6b10150. Epub 2016 Nov 29.

Photoinitiated cationic polymerizations are widely used in industrial processes; however, gaining photocontrol over chain growth would expand the utility of these methods and facilitate the design of novel complex architectures. We report herein a cationic polymerization regulated by visible...

Sigmoid Septum and Aberrant Calcified Papillary Muscle in the Setting of Advanced Hypertrophic Cardiomyopathy: An Unusual Life-threatening Coalescence.

Journal of cardiovascular imaging

Hallo C, Kottiech S, Castillo J.
PMID: 31359639
J Cardiovasc Imaging. 2019 Jul;27(3):230-233. doi: 10.4250/jcvi.2019.27.e34.

No abstract available.

Photocontrolled Radical Polymerization from Hydridic C-H Bonds.

Journal of the American Chemical Society

Stache EE, Kottisch V, Fors BP.
PMID: 32046481
J Am Chem Soc. 2020 Mar 11;142(10):4581-4585. doi: 10.1021/jacs.0c00287. Epub 2020 Feb 25.

Given the ubiquity of carbon-hydrogen bonds in biomolecules and polymer backbones, the development of a photocontrolled polymerization selectively grafting from a C-H bond represents a powerful strategy for polymer conjugation. This approach would circumvent the need for complex synthetic...

On Demand Switching of Polymerization Mechanism and Monomer Selectivity with Orthogonal Stimuli.

ACS central science

Peterson BM, Kottisch V, Supej MJ, Fors BP.
PMID: 30276257
ACS Cent Sci. 2018 Sep 26;4(9):1228-1234. doi: 10.1021/acscentsci.8b00401. Epub 2018 Aug 08.

The development of next-generation materials is coupled with the ability to predictably and precisely synthesize polymers with well-defined structures and architectures. In this regard, the discovery of synthetic strategies that allow on demand control over monomer connectivity during polymerization...

Taking the sting out of assessment: is there a role for progress testing?.

Medical education

Reynolds L, Kostich S.
PMID: 28211078
Med Educ. 2017 Jul;51(7):768. doi: 10.1111/medu.13259. Epub 2017 Feb 17.

No abstract available.

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

Angewandte Chemie (International ed. in English)

Kottisch V, Supej MJ, Fors BP.
PMID: 29750387
Angew Chem Int Ed Engl. 2018 Jul 02;57(27):8260-8264. doi: 10.1002/anie.201804111. Epub 2018 Jun 05.

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....

Photoswitching Cationic and Radical Polymerizations: Spatiotemporal Control of Thermoset Properties.

Journal of the American Chemical Society

Ma Y, Kottisch V, McLoughlin EA, Rouse ZW, Supej MJ, Baker SP, Fors BP.
PMID: 34878283
J Am Chem Soc. 2021 Dec 08; doi: 10.1021/jacs.1c09523. Epub 2021 Dec 08.

The ability to fabricate polymeric materials with spatially controlled physical properties has been a challenge in thermoset manufacturing. To address this challenge, this work takes advantage of a photoswitchable polymerization that selectively incorporates different monomers at a growing chain...

Showing 1 to 12 of 13 entries