Michael Schmitt is the Head of Newsroom and a journalist with a focus on sports and medical research. He has written for various publications, including Planet Sport, The Lancet, DM2I, and Cigalah Group. His work has also been featured in Yahoo News UK and Yahoo Sports UK.
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Michael Schmitt's coverage has a strong focus on event coverage within the realm of professional sports, particularly golf and tennis. Therefore, he would likely be most responsive to pitches related to upcoming or ongoing sporting events such as championships, tournaments, or significant matches.
Given Michael's emphasis on event coverage in the world of professional sports, he may also respond well to pitches that provide behind-the-scenes insights into athletes' training regimens or their mental preparation for high-stakes competitions.
As there is no specific geographic focus mentioned for Michael's articles, it seems like his interest lies in covering major international events and developments within the realms of golf and tennis without being limited by geographical boundaries.
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By: Michael Schmitt
More for You More for You
By: Michael Schmitt
More for You More for You
By: Michael Schmitt
More for You More for You
By: Michael Schmitt
More for You More for You
More for You More for You
By: Michael Schmitt
More for You More for You
By: Michael Schmitt
More for You More for You
By: Fabrice Morlet-Savary, Jacques Lalevée, Ji Feng, Frédéric Dumur, Jing Zhang, Michael Schmitt, Yijun Zhang
A series of 15 dyes based on the 2‐phenylnaphtho[2,3‐ d ]thiazole‐4,9‐dione scaffold and 1 compound based on the 2,3‐diphenyl‐1,2,3,4‐tetrahydrobenzo[ g ]quinoxaline‐5,10‐dione scaffold are studied as photoinitiators. These compounds are used in two‐ and three‐component high‐performance photoinitiating systems for the free radical polymerization of trimethylolpropane triacrylate (TMPTA) and polyethylene glycol diacrylate (PEGDA) under sunlight. Remarkably, the conversion of TMPTA can reach ≈60% within 20 s, while PEGDA attains a 96% conversion within 90 s. To delve into the intricate chemical mechanisms governing the polymerization, an array of analytical techniques is employed. Specifically, UV–vis absorption and fluorescence spectroscopy, steady‐state photolysis, stability experiments, fluorescence quenching experiments, cyclic voltammetry, and electron spin resonance spin trapping (ESR‐ST) experiments, collectively contribute to a comprehensive understanding of the photochemical mechanisms. Photoinitiation capacities of these systems are determined using real‐time Fourier transformed infrared spectroscopy (RT‐FTIR). Of particular interest is the revelation that, owing to the superior initiation ability of these dyes, high‐resolution 3D patterns can be manufactured by direct laser write (DLW) technology and 3D printing. This underscores the efficient initiation of free radical polymerization processes by the newly developed dyes under both artificial and natural light sources, presenting an avenue for energy‐saving, and environmentally friendly polymerization conditions.
By: Zheng Liu, Didier Gigmes, Yijun Zhang, Fabrice Morlet-Savary, Céline Dietlin, Michael Schmitt, Frédéric Dumur, Jacques Lalevée
In this study, a series of seven PCBOEs was innovatively designed and successfully synthesized for the first time by bridging a phenothiazine and a carbazole unit by mean of an acetylene spacer and bearing oxime ester groups as end groups on both sides. Structures of the different difunctional oxime esters were confirmed through NMR and HRMS. All PCBOEs exhibited excellent light absorption properties in the visible range. Upon excitation with a 405 nm LED for 60 s, a complete photolysis of the oxime esters could be achieved. Parameters such as the singlet state energy and the triplet state energy demonstrated the facile generation of the corresponding radicals upon light absorption by PCBOEs. Photopolymerization kinetics in TMPTA confirmed the homolytic cleavage of oxime esters and the generation of radicals. CO2 absorption peaks were detected when the PCBOEs/TMPTA systems were excited with a 405 nm LED. Based on the positive results, the photochemical mechanisms of polymerization with PCBOEs was proposed. PCBOE3 was identified as the best candidate of the series and this bifunctional oxime ester was successfully used for the 3D-printing of the “IS2M” logo via DLW. Experimental results from DSC also confirmed that PCBOEs not only serve as photoinitiators but also possess high reactivity as thermal initiators
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