29103-78-4Relevant academic research and scientific papers
Enantioselective synthesis, crystal structure, and photophysical properties of a 1,1′-bitriphenylene-based sila[7]helicene
Murayama, Koichi,Oike, Yasuaki,Furumi, Seiichi,Takeuchi, Masayuki,Noguchi, Keiichi,Tanaka, Ken
, p. 1409 - 1414 (2015)
A 1,1′-bitriphenylene-based sila[7]helicene was synthesized with a high ee value by enantioselective double [2+2+2] cycloaddition of a biaryl-linked tetrayne with a silicon-linked bis(propargylic alcohol) as a key step. This sila[7]helicene exhibited a high tolerance toward racemization, which could be explained by the X-ray crystal structure analysis. With respect to the photophysical properties, this sila[7]helicene exhibited a relatively high fluorescence quantum yield and circularly polarized luminescence activity.
New sensitizer-modified calix[4]arenes enabling near-UV excitation of complexed luminescent lanthanide ions
Steemers, Frank J.,Verboom, Willem,Reinhoudt, David N.,Van Der Tol, Erik B.,Verhoeven, Jan W.
, p. 9408 - 9414 (1995)
The synthesis is described of a series of calix[4]arenes with three different sensitizer chromophores ("antenna") attached to the lower rim via a short spacer. In the Eu3+ and Tb3+ complexes of these calixarenes, photoexcitation of the antenna can induce lanthanide emission via intramolecular energy transfer. Although the higher energy of the Tb3+ luminescent state makes it more difficult to sensitize than in the case of Eu3+, especially a triphenylene antenna is found to have strong sensitizing ability toward not only Eu3+ but also Tb3+, allowing excitation of the lanthanide with wavelengths extending to 350 nm.
Catalytic Dehydrogenative Cyclization of o-Teraryls under pH-Neutral and Oxidant-Free Conditions
Dong, Guangbin,Tsukamoto, Tatsuhiro
, p. 15249 - 15253 (2020/06/30)
A cobaloxime-catalyzed acceptorless dehydrogenative cyclization of o-teraryls was developed. In stark contrast to the established methods such as the Scholl or Mallory reactions, this method does not require any strong acids or oxidants, and shows high atom economy and a broad substrate scope. It operates at near room temperature with light as the source of energy. Acid- or oxidant-sensitive functional groups, such as 4-methoxyphenyl, unprotected benzyl alcohol, silyl ether, and thiophene groups are tolerated. Remarkably, aryls with electron-withdrawing groups, and electron-poor heteroarenes, such as pyridine and pyrimidine, can also react. Preliminary mechanistic study reveals that hydrogen gas is released during the reaction, and both light and the cobalt catalyst are important for the dehydrogenation step.
NOVEL ORGANOMETALLIC COMPLEXES WHICH EMIT IN THE RED TO GREEN SPECTRAL REGION AND THEIR USE IN OLEDS
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, (2013/09/12)
Organometallic complexes which bear at least one ligand which has a unit having a triplet energy of at least 22 000 cm?1, a process for preparing the organometallic complexes, a mixture comprising at least one inventive organometallic complex,
The reaction of organozinc compounds with an aldehyde within a crystalline molecular flask
Ikemoto, Koki,Inokuma, Yasuhide,Fujita, Makoto
supporting information; experimental part, p. 5750 - 5752 (2010/10/21)
(Figure Presented) Organozinc addition reactions were carried out on an aldehyde within a porous coordination network (see picture) in a single-crystal-to-single-crystal fashion, and the product structure was unambiguously determined by X-ray diffraction.
A general approach to triphenylenes and azatriphenylenes: Total synthesis of dehydrotylophorine and tylophorine
McIver, Andrew,Young, Douglas D.,Deiters, Alexander
supporting information; experimental part, p. 4750 - 4752 (2009/03/12)
A convergent and flexible synthesis of substituted triphenylenes, azatriphenylenes, and the cytotoxic alkaloids dehydrotylophorine and tylophorine has been developed. The Royal Society of Chemistry.
Synthesis of Phenanthroisoquinoline
Tanga, M.J.,Davis, R.F.,Reist, E.J.
, p. 39 - 41 (2007/10/02)
The synthesis of phenanthroisoquinoline is presented.
