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2441“…The metal‐free catalyst tris(2,4,6‐trifluorophenyl)borane has demonstrated its extensive applications in the 1,2‐hydroboration of numerous unsaturated reagents, namely alkynes, aldehydes and imines, consisting of a wide array of electron‐withdrawing and donating functionalities. A range of over 50 borylated products are reported, with many reactions proceeding with low catalyst loading under ambient conditions. …”
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2442por Bari, Ahmed, Ali, Syed S., Alanazi, Amer M., Mashwani, Muhammad A., Al-Obaid, Abdulrahman M.“…Due to the presence of electron donating and electron withdrawing character on formyl sugars which makes the molecule more susceptible to nucleophilic attack. …”
Publicado 2018
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2443por Chávez, Patricia, Bulut, Ibrahim, Fall, Sadiara, Ibraikulov, Olzhas A., Chochos, Christos L., Bartringer, Jérémy, Heiser, Thomas, Lévêque, Patrick, Leclerc, Nicolas“…As a consequence, its charge transport and photovoltaic properties in a blend with the usual P3HT electron-donating polymer have been investigated.…”
Publicado 2018
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2444por Pickl, Mathias, Winkler, Christoph K., Glueck, Silvia M., Fraaije, Marco W., Faber, Kurt“…In an attempt to improve the binding of the aldehyde hydrate in the active site to boost aldehyde-oxidase activity, two active-site residues were exchanged for hydrogen-bond-donating and -accepting amino acids. Enhanced over-oxidation was demonstrated and Michaelis–Menten kinetics were performed to corroborate these findings.…”
Publicado 2017
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2445“…Compounds that possess a number of hydrogen-bond-accepting and/or -donating groups like phenolics and quinones show extensive interactions with the targets. …”
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2446por Sze, Stephen Cho Wing, Tong, Yao, Ng, Tzi Bun, Cheng, Chris Lok Yin, Cheung, Ho Pan“…Their anti-oxidative properties are found to be related to an inductive effect on endogenous free-radical scavenging enzymes such as catalase and glutathione peroxidase and the inherent electron-donating ability of flavonoids.…”
Publicado 2010
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2447por Devlin, Jennifer, Kerr, William. J., Lindsay, David M., McCabe, Timothy J. D., Reid, Marc, Tuttle, Tell“…A range of benzoate esters were screened, including derivatives with electron-donating and -withdrawing groups in the para- position. …”
Publicado 2015
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2448por Siegl, Sebastian J., Galeta, Juraj, Dzijak, Rastislav, Dračínský, Martin, Vrabel, Milan“…The crucial structural elements that determine dye formation are electron‐donating groups present in the starting tetrazine unit. …”
Publicado 2019
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2449“…The reaction tolerates substitution in ortho-, meta- and para-substitution as well as electron-donating and electron-withdrawing groups. The S-cyclopropylation of a thiophenol was also accomplished using potassium cyclopropyl trifluoroborate.…”
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2450por Roy, Matthew M. D., Ferguson, Michael J., McDonald, Robert, Zhou, Yuqiao, Rivard, Eric“…The facile synthesis of a rare two-coordinate acyclic silylene (R(2)Si:) that is stabilized using a bulky vinylic N-heterocyclic olefin ligand and the strongly σ-donating hypersilyl group [Si(SiMe(3))(3)](–) is reported. …”
Publicado 2019
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2451“…Unpromoted Pt is competent with benzylic substrates bearing either electron-donating or electron-withdrawing substituents. Use of both K(2)CO(3) and Bi additives accelerates the rate of alcohol oxidation and affords high yields with challenging heterocyclic alcohols.…”
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2452por Kato, Kenta, Lin, Hsing-An, Kuwayama, Motonobu, Nagase, Mai, Segawa, Yasutomo, Scott, Lawrence T., Itami, Kenichiro“…Corresponding decaarylated WNGs containing electron-withdrawing and -donating groups were synthesized from decaborylated WNG using Suzuki–Miyaura cross-coupling reactions to afford the red-emissive warped nanographene derivative.…”
Publicado 2019
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2453por Gao, Mingchun, Shen, Bowen, Zhou, Junhan, Kapre, Rohan, Louie, Angelique Y., Shaw, Jared T.“…[Image: see text] A series of spiropyran (SP)-based magnetic resonance imaging (MRI) contrast agents have been synthesized and evaluated for changes in relaxivity resulting from irradiation with visible light. Both electron-donating and electron-withdrawing substituents were appended to the SP ring in order to study the electronic effects on the photochromic and relaxivity properties of these photoswitchable MRI contrast agents. …”
Publicado 2020
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2454por Ravariu, Cristian, Mihaiescu, Dan, Morosan, Alina, Vasile, Bogdan Stefan, Purcareanu, Bogdan“…To the best of our knowledge, this is the first report of an n-type non-toxic semiconductor for organic transistors that uses sulpho-salicylic acid—a stable, electron-donating compound with reduced toxicity—grafted on a ferrite core–shell and a green synthesis method. …”
Publicado 2020
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2455“…The reaction is sensitive to the electronic nature of the substituents on the benzene ring of the triarylantimony difluorides: an electron-donating group showed higher reactivity than an electron-withdrawing group. …”
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2456“…Furthermore, these compounds show a narrow energy gap (1.75–2.38 eV), and high Ea values increasing for polymers, which prove their electron-donating nature and semiconductor properties. The measurements were enhanced by theoretical modeling.…”
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2457por Authesserre, Ugo, Hameury, Sophie, Dajnak, Aymeric, Saffon-Merceron, Nathalie, Baceiredo, Antoine, Madec, David, Maerten, Eddy“…Due to their remarkable electronic features, recent years have witnessed the emergence of carbones L(2)C, which consist in two donating L ligands coordinating a central carbon atom bearing two lone pairs. …”
Publicado 2021
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2458“…Herein, we computationally explore the effect of incorporating electron accepting and electron donating units on CPP photophysical properties at the CAM-B3LYP/6-311G** level. …”
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2459“…The reaction can be extended to a wide range of substrates, and the target products can be synthesized smoothly, regardless of the presence of electron-donating and electron-withdrawing groups. The proposed strategy is a new direction in the field of rearrangement reactions.…”
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2460por Guo, Xusheng, Li, Chao, Wang, Weibo, Zhang, Baowen, Hou, Yuanjun, Wang, Xuesong, Zhou, Qianxiong“…For other examined complexes, a stronger electron-donating substituent may lead to a higher hydrogen evolution efficiency, suggesting that the formation of a Co(iii) hydride intermediate is the rate-limiting step.…”
Publicado 2021
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