171820-02-3Relevant articles and documents
A meta-molecular tailoring strategy towards an efficient violet-blue organic electroluminescent material
Chen, Wen-Cheng,Wu, Guang-Fu,Yuan, Yi,Wei, Huai-Xin,Wong, Fu-Lung,Tong, Qing-Xiao,Lee, Chun-Sing
, p. 18067 - 18074 (2015)
In this paper, an efficient violet-blue emitter 4,4′′-bis(1-(4-(tert-butyl)phenyl)-1H-phenanthro[9,10-d]imidazol-2-yl)-1,1′:3′,1′′-terphenyl (m-BBTPI) was designed and synthesized by linking two phenanthroimidazole units via the meta position of a freely rotatable phenyl bridge. The present design provides a suitable level of conjugation between the two phenanthroimidazole units such that fluorescence is strengthened over the single unit while a violet-blue emission can be maintained by limiting the amount of redshift. The new emitter m-BBTPI is also found to have good thermal stability, strong violet-blue emission and bipolar charge transporting properties. An electroluminescent device using m-BBTPI as a non-doped emission layer shows a low turn-on voltage (3.2 V), good colour purity (0.16, 0.06) as well as high current and power efficiencies (1.99 cd A-1, 1.81 lm W-1). These performance parameters are comparable to the state-of-the-art non-doped violet-blue OLEDs. This journal is
Synthesis, complexation studies and biological applications of some novel stilbenophanes, indolophanes and bisindolostilbenophanes via McMurry coupling
Rajakumar, Perumal,Gayatri Swaroop, Merikapudi,Jayavelu,Murugesan
, p. 12041 - 12050 (2006)
Various types of stilbenophanes, indolophanes and bisindolostilbenophanes were synthesized by intra-, inter- and tandem intra-, intermolecular McMurry coupling. Some of the indolophanes and bisindolostilbenophanes exhibited significant activity against th
The use of McMurry coupling for the synthesis of indolophanes and cis-stilbenophanes
Rajakumar, Perumal,Gayatri Swaroop, Merikapudi
, p. 6165 - 6167 (2004)
Treatment of 2equiv of indole-3-aldehyde with o, m, p-xylyl, 2,5-dimethoxy-p-xylyl dibromides and 4,4′-bis(bromomethyl)-1,1′- biphenyl gave the bisalkylated products, which underwent McMurry coupling with low valent titanium to give indolophanes. Various cis-stilbenophanes with m-terphenyl building blocks were also synthesized by application of the McMurry coupling technique.
Synthesis and Characterization of Novel Mono- And Bis-Guanyl Hydrazones as Potent and Selective ASIC1 Inhibitors Able to Reduce Brain Ischemic Insult
Gornati, Davide,Ciccone, Roselia,Vinciguerra, Antonio,Ippati, Stefania,Pannaccione, Anna,Petrozziello, Tiziana,Pizzi, Erika,Hassan, Amal,Colombo, Eleonora,Barbini, Stefano,Milani, Mario,Caccavone, Cecilia,Randazzo, Pietro,Muzio, Luca,Annunziato, Lucio,Menegon, Andrea,Secondo, Agnese,Mastrangelo, Eloise,Pignataro, Giuseppe,Seneci, Pierfausto
supporting information, p. 8333 - 8353 (2021/06/28)
Acid-sensitive ion channels (ASICs) are sodium channels partially permeable to Ca2+ions, listed among putative targets in central nervous system (CNS) diseases in which a pH modification occurs. We targeted novel compounds able to modulate ASIC1 and to reduce the progression of ischemic brain injury. We rationally designed and synthesized several diminazene-inspired diaryl mono- and bis-guanyl hydrazones. A correlation between their predicted docking affinities for the acidic pocket (AcP site) in chicken ASIC1 and their inhibition of homo- and heteromeric hASIC1 channels in HEK-293 cells was found. Their activity on murine ASIC1a currents and their selectivity vs mASIC2a were assessed in engineered CHO-K1 cells, highlighting a limited isoform selectivity. Neuroprotective effects were confirmedin vitro, on primary rat cortical neurons exposed to oxygen-glucose deprivation followed by reoxygenation, andin vivo, in ischemic mice. Early lead 3b, showing a good selectivity for hASIC1 in human neurons, was neuroprotective against focal ischemia induced in mice.
Toward Electrochromic Metallopolymers: Synthesis and Properties of Polyazomethines Based on Complexes of Transition-Metal Ions
Napiera?a, Sergiusz,Kubicki, Maciej,Wa??sa-Chorab, Monika
, p. 14011 - 14021 (2021/09/06)
The tridentate ligand L and its complexes with transition-metal ions have been prepared and characterized. The polycondensation reactions of transition-metal complexes with different dialdehydes led to the formation of transition-metal-complex-based polyazomethines, which have been obtained by on-substrate polymerization, and their electrochemical and electrochromic performance have been investigated. The most interesting properties are exhibited by polymers of Fe(II) and Cu(II) ions obtained by the reaction of the appropriate complexes with a triphenylamine-based dialdehyde. Fe(II) polymer P1 undergoes a reversible oxidation/reduction process and a color change from orange to gray due to the oxidation of Fe(II) to Fe(III) ions concomitant with the oxidation of the triphenylamine group. Its electrochromic properties such as long-term stability, switching times, and coloration efficiencies have been investigated, providing evidence of the utility of the on-substrate polycondensation reaction in the formation of thin films of electrochromic metallopolymers.
Palladium-catalyzed synthesis of diarylbenzenes from coupling reactions between equal amount of diiodoarenes and arylboronic acids
Mao, Jincheng,Li, Ran,He, Yue,Yang, Xiaojiang,Wang, Dingli,Zhang, Yang
, p. 663 - 669 (2016/07/26)
We reported a highly effective Pd-catalytic system for the synthesis of diarylbenzenes through Suzuki-type reaction between equal amount of diiodoarenes and arylboronic acids. This preferential oxidative addition resulted in such high selectivity.
Multi-layered, covalently supported ionic liquid phase (mlc-SILP) as highly cross-linked support for recyclable palladium catalysts for the suzuki reaction in aqueous medium
Gruttadauria, Michelangelo,Liotta, Leonarda Francesca,Salvo, Anna Maria Pia,Giacalone, Francesco,La Parola, Valeria,Aprile, Carmela,Noto, Renato
experimental part, p. 2119 - 2130 (2011/10/09)
The reaction between an excess of 1,4-bis(3-vinylimidazolium-1-yl) bromide and a mercaptopropyl-modified amorphous silica gel or ordered mesoporous silica SBA-15 in the presence of azobisisobutyronitrile (AIBN) afforded new materials, which have a high loading of imidazolium moieties. These materials, which contain a highly cross-linked polymeric network, have been denoted as multi-layered, covalently supported ionic liquid phase (mlc-SILP) and have been used as support for palladium catalysts containing a high loading of the metal (10 wt%). Such materials were characterized by several techniques ( 13C magic angle spinning nuclear magnetic resonance, the Brunauer-Emmett-Teller technique, small-angle X-ray scattering, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy). The presence of a homogeneous distribution of palladium nanoparticles was established. The palladium catalysts displayed good activity allowing the synthesis of several biphenyl compounds in high yields working with only 0.1 mol% of palladium loading at mild temperatures (room temperature or 50 °C) in ethanol/water. Reactions carried out on a 10-mmol scale required only 10 mg of catalysts. Good recyclability was observed. Copyright
Synthesis of chiral nonracemic polyimine macrocycles from cyclocondensation reactions of biaryl and terphenyl aromatic dicarboxaldehydes and 1R,2R-diaminocyclohexane
Kuhnert, Nikolai,Patel, Chirag,Jami, Fatemeh
, p. 7575 - 7579 (2007/10/03)
The synthesis of biaryl and terphenyl dicarboxaldehydes using Suzuki coupling methodology and their macrocyclisation reactions with 1R,2R-diaminocyclohexane yielding novel polyimine macrocycles derived from the [2+2] and [3+3] cyclocondensation reactions
