Safety of Benzophenone. In 2021.0 POLYMERS-BASEL published article about POLYMERS; KINETICS; DYES in [Huang, Tung-Liang; Chen, Yung-Chung] Natl Kaohsiung Univ Sci & Technol, Dept Chem & Mat Engn, Kaohsiung 80778, Taiwan; [Chen, Yung-Chung] Natl Kaohsiung Univ Sci & Technol, Photo SMART Photo Sensit Mat Adv Res & Technol Ct, Kaohsiung 80778, Taiwan in 2021.0, Cited 31.0. The Name is Benzophenone. Through research, I have a further understanding and discovery of 119-61-9.
Three novel visible-light absorbing benzophenone-based hydrogen acceptors (BPD-D, BPDM-D and BPDP-D) were designed on the basis of a donor-benzophenone-donor structural backbone. Mono or diketone units and double diphenylamine electron-donating groups in para-or meta-positions were introduced to comprehend the electronic and structural effects on free radical photopolymerization (FRPP). Such a structural change leads not only to a red-shift of the absorption maxima but strongly enhances their molar extinction coefficients compared to the commercial phototinitiators such as benzophenone (BP) and 4,4 ‘-bis(diethylamino) benzophenone (EMK). In addition, excellent melting points and thermal decomposition temperatures were achieved for those novel compounds. Further, the photochemical reaction behavior was studied by cyclic voltammograms (CV), photolysis and electron spin resonance (ESR) spectroscopy. Finally, benzophenone derivatives in combination with an amine (TEA, triethylamine) as a co-initiator were prepared and initiated the FRPP of trimethylolpropane trimethacrylate (TMPTMA) using a UV lamp as a light source. When used in stoichiometric amounts, the BPDP-D/TEA had the best double bond conversion efficiency among all the compounds studied, and were even superior to the reference compounds of BP/TEA and EMK/TEA. The results and conclusions could provide the fundamental rules applicable for the structural design of benzophenone derivative-based photoinitiators.
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Reference:
Thiomorpholine – Wikipedia,
,Thiomorpholine | C4H9NS – PubChem