- One-step hydroxylation of aryl and heteroaryl fluorides using mechanochemistry
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Simple use of KOH allows the direct F to OH exchange of aromatic and heteroaromatic substrates under mechanochemical conditions. The reaction is performed in the absence of solvent with potassium hydroxide as OH source. As a result, this approach is both more atom economical and environmentally friendly than previously described methods for this transformation.
- Braje, Wilfried,Geneste, Hervé,Rodrigo, Eduardo,Walter, Magnus W.,Wiechert, Rainer
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supporting information
p. 1469 - 1473
(2022/03/07)
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- Modulation of Thermally Activated Delayed Fluorescence in Waterborne Polyurethanes via Charge-Transfer Effect
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Here, we designed several waterborne polyurethanes (WPUs) with efficient thermally activated delayed fluorescence (TADF) via serving charge-transfer (CT) states as a mediate bridge between singlet and triplet states to boost reverse intersystem crossing (RISC). By tuning substituents of diphenyl sulfone (DS), we found that O,O′- and S,S′-substituted DS covalently incorporated in WPUs solely show typical fluorescence emission with lifetimes in the nanosecond range. Interestingly, TADF appears by replacing the substituent with the nitrogen atom, of which lifetimes are up to ≈10 microseconds and ≈1 millisecond in air and vacuum, respectively, even though the energy gap between singlet and triplet states (ΔEST) is still large for generating TADF. To explain this phenomenon, an energy level mode based on CT states and an 3(n-π*) receiver state was proposed. By the rational modulation of CT states, it is possible to tune the ΔEST to render TADF-based materials suitable for versatile applications.
- Li, Zongren,Wang, Tao,Xu, Dong,Zuo, Jie,Li, Xinyu,Li, Zhiwei,Xu, Fei,Zhang, Xingyuan
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p. 2302 - 2308
(2019/06/17)
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- ION TRANSFER COMPOUND
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The present invention relates to an ion transfer compound. According to an embodiment of the present invention, the compound contains three or more ion transfer functional groups, and may have high ion conductivity.COPYRIGHT KIPO 2017
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Paragraph 0082-0083
(2017/05/23)
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- Well-defined star-shaped rod-coil diblock copolymers as a new class of unimolecular micelles: Encapsulation of guests and thermoresponsive phase transition
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A series of star-shaped rod-coil diblock copolymers composed of poly(arylene ether sulfone) (PAES) as a core, and poly[2-(2-methoxyethoxy)ethyl methacrylate-co-oligo(ethylene glycol) methacrylate] [poly(MEO 2MA-co-OEGMA)] as a shell was synthes
- Park, Jeyoung,Moon, Mihee,Seo, Myungeun,Choi, Hyungsam,Kim, Sang Youl
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experimental part
p. 8304 - 8313
(2011/12/15)
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- Heat-sensitive recording material
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A heat-sensitive recording material which comprises in its color reactant system, as developer for the color former, at least one aluminum or zinc phenate of a phenolsulfonyl compound of the formula STR1 wherein R is C1 -C12 alkyl, cycloalkyl, phenyl, benzyl, or phenyl which is substituted by halogen, lower alkyl, lower alkoxy, nitro or methylenedioxy, and X is hydrogen, halogen, lower alkyl or lower alkoxy.
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