602-15-3Relevant articles and documents
Efficient C-F and C-C activation by a novel N-heterocyclic carbene-nickel(0) complex
Schaub, Thomas,Radius, Udo
, p. 5024 - 5030 (2005)
The NHC-stabilized complex [Ni2(iPr2Im) 4(cod)] (1) was isolated in good yield from the reaction of [Ni-(cod)2] with 1,3-diisopropylimidazole-2-ylidene (iPr 2Im). Compound 1 is a source of the [Ni(iPr
Exploring highly efficient light conversion agents for agricultural film based on aggregation induced emission effects
Qi, Yunpeng,Wang, Yongtao,Yu, Yongjiang,Liu, Zhiyong,Zhang, Yan,Qi,Zhou, Changtong
, p. 11291 - 11297 (2016)
Aggregation-induced emission (AIE) is a unique photo-physical phenomenon that has become an emerging and hot research area. It has a wide range of applications due to its excellent luminous properties. In this paper, five compounds and their corresponding light conversion films were prepared based on AIE effects and the thermally activated delayed fluorescence (TADF) phenomenon. Furthermore, ultraviolet conversion, dispersion and photo-physical properties such as UV-vis spectra, fluorescence spectra, and photo stability as well as the mechanical properties of the light conversion films were investigated in detail. The results reveal that triphenylacrylonitrile (TPA) exhibits excellent photo stability and ultraviolet light conversion properties. In addition, the fluorescence emission spectrum of TPA corresponds well with the absorption spectrum of plants in the blue-violet region. In particular, the light conversion film with added TPA also shows enhanced mechanical properties and slightly lower visible light transmittance (3.79%) compared to PVC blank film. Based on the photo stabilities of the five compounds, it can be concluded that the electron-withdrawing cyano group can increase the photo stability of TPA, while carbazole substituents are proved to have an uncertain effect on the rate of photo oxidation, which is attributed to the electron-donating properties of carbazole and increased molecular distortion or rigidity. Finally, it is worth mentioning that this is the first report utilizing AIE-active luminogens (AIEgens) in agricultural light conversion film.
Synthesis of Polycyclic Aromatic Hydrocarbons by the Pd-Catalyzed Annulation of Alkynes
Larock, Richard C.,Doty, Mark J.,Tian, Qingping,Zenner, John M.
, p. 7536 - 7537 (1997)
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Quantitative application of principal component analysis and self-modeling spectral resolution to product analysis of tetraphenylethylene photochemical reactions
Bunker, Christopher E.,Hamilton, Norwood B.,Sun, Ya-Ping
, p. 3460 - 3465 (1993)
Tetraphenylethylene readily undergoes photochemical reactions in room-temperature solutions. Principal component analysis and self-modeling spectral resolution are applied to the characterization of reaction products. On the basis of principal component a
α-Bromoacrylic Acids as C1 Insertion Units for Palladium-Catalyzed Decarboxylative Synthesis of Diverse Dibenzofulvenes
Zhang, Minghao,Deng, Wenbo,Sun, Mingjie,Zhou, Liwei,Deng, Guobo,Liang, Yun,Yang, Yuan
, p. 5744 - 5749 (2021/08/18)
Herein α-bromoacrylic acids have been employed as C1 insertion units to achieve the palladium-catalyzed [4 + 1] annulation of 2-iodobiphenyls, which provides an efficient platform for the construction of diverse dibenzofulvenes. This protocol enables the formation of double C(aryl)-C(vinyl) bonds via a C(vinyl)-Br bond cleavage and decarboxylation. It is particularly noteworthy that the method features a broad substrate scope, and various interesting frameworks, such as bridged ring, fused (hetero)aromatic ring, and divinylbenzene, can be successfully incorporated into the products.
A Theoretical Study on the Mechanism of the Oxidative Deborylation/C-C Coupling Reaction of Borepin Derivatives
?zen, Cihan,Shoji, Yoshiaki,Fukushima, Takanori,Maeda, Satoshi
, p. 1941 - 1950 (2019/05/16)
One-electron oxidation of borepin derivatives that consists of a boron-containing seven-membered ring has been reported to cause deborylation/C-C coupling, yielding aromatic compounds. The reaction can be achieved not only by transition metal compounds but also by oxidants without transition metal such as O2 and other organic compounds. Despite numerous experimental attempts, the mechanism of this peculiar reaction as well as the fate of the BCl part eliminated from borepin remain unclear to date. Based on theoretical approaches using the artificial force induced reaction method, here we address the mechanism of the unusual boron-mediated C-C coupling. For this purpose, two borepin derivatives (1 and 35), bearing ethyl and phenyl groups, respectively, were used as reactants, and FeCl3/MeNO2 and O2 were chosen as oxidants. The calculations revealed reaction pathways that provided an overall picture of the mechanism of the target reaction, which features four key steps, namely, (i) quaternization of the boron atom by the coordination of oxidant, (ii) intersystem crossing, (iii) skeletal rearrangement to form a six-membered ring, and (iv) elimination of a boron moiety. The intrinsic nature of boron, i.e., a strong tendency to accept a coordination ligand even under oxidative conditions, is responsible for the oxidative deborylation/C-C coupling of borepin.
