632-51-9Relevant articles and documents
Crystal and molecular structure of benzophenone azine: evidence for an Fe(II) carbene intermediate
Saha, Anjan K.,Hossain, M. Mahmun,Grubisha, Desiree S.,Bennett, Dennis W.
, p. 383 - 388 (1995)
Benzophenone azine crystallizes in the monoclinic space group A2/a (No. 15) with a=16.303(3) Angstroem, b=5.4864(2) Angstroem, c=21.973(5) Angstroem, β=85.52(2)deg, V=1959.4(8) Angstroem3, and Dcalc=1.22 g cm-3 for Z=4.The structure was solved by direct methods and refined against F to a final R value of 0.047.The unit cell contains four molecules of the title compound; the asymmetric unit consists of half a molecule.Despite the high crystallographic symmetry, the two halves of the molecule are not related by a center of symmetry; instead, the molecule adopts C2 symmetry; the molecular C2 axis is coincident with the crystallographic twofold axis.The formation of benzophenone azine from the reaction of the iron-containing Lewis acid complex 5-C5H5)Fe(CO)2(THF)>+ - and diphenyldiazomethane provides strong evidence for an Fe(II) carbene intermediate.KEY WORDS: Azine; azitine; iron(II) carbene; catalyst.
Meyers et al.
, p. 1105 (1974)
Hong et al.
, p. 993 (1972)
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Bachmann
, p. 449 (1934)
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Synthesis of wholly aromatic polymers possessing tetra-aryl-substituted vinylene units by palladium-catalyzed three-component coupling polymerization
Nakagawa, Kojiro,Tomita, Ikuyoshi
, p. 638 - 639 (2007)
The synthesis of novel wholly aromatic poly(arylenevinylene)s containing tetra-aryl-substituted olefin units in the main chain by the three-component coupling polymerization of aryl dihalides, aryl diboronic acids, and acetylene derivatives is described. For instance, a polymer (Mn = 2600, M w/Mn = 1.6) was obtained in a 76% yield by the polymerization of 1,4-diiodobenzene, diphenylacetylene, and 1,4- phenylenediboronic acid in DMF/H2O at 100°C for 24 h in the presence of PdCl2(PhCN)2 (1 mol %) and KHCO3. The obtained polymer is soluble in organic solvents such as CHCl3, THF, and toluene, although it does not have any soft lateral segments. Copyright
Meso/microporous carbons from conjugated hyper-crosslinked polymers based on tetraphenylethene for high-performance co2 capture and supercapacitor
Ahmed, Mahmoud M. M.,Du, Wei-Ting,Kuo, Shiao-Wei,Mohamed, Mohamed Gamal
, (2021)
In this study, we successfully synthesized two types of meso/microporous carbon materials through the carbonization and potassium hydroxide (KOH) activation for two different kinds of hyper-crosslinked polymers of TPE-CPOP1 and TPE-CPOP2, which were synthesized by using Friedel–Crafts reaction of tetraphenylethene (TPE) monomer with or without cyanuric chloride in the presence of AlCl3 as a catalyst. The resultant porous carbon materials exhibited the high specific area (up to 1100 m2 g?1 ), total pore volume, good thermal stability, and amorphous character based on thermogravimetric (TGA), N2 adsoprtion/desorption, and powder X-ray diffraction (PXRD) analyses. The as-prepared TPE-CPOP1 after thermal treatment at 800?C (TPE-CPOP1-800) displayed excellent CO2 uptake performance (1.74 mmol g?1 at 298 K and 3.19 mmol g?1 at 273 K). Furthermore, this material possesses a high specific capacitance of 453 F g?1 at 5 mV s?1 comparable to others porous carbon materials with excellent columbic efficiencies for 10,000 cycle at 20 A g?1 .
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Roberts et al.
, p. 760,763 (1951)
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Boissieu
, p. 681 (1888)
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A Tetradentate Phosphonate Ligand-based Ni-MOF as a Support for Designing High-performance Proton-conducting Materials
Chakraborty, Debabrata,Ghorai, Arijit,Chowdhury, Avik,Banerjee, Susanta,Bhaumik, Asim
supporting information, p. 1562 - 1569 (2021/05/13)
Developing a robust metal-organic framework (MOF) which facilitates proton hopping along the pore channels is very demanding in the context of fabricating an efficient proton-conducting membrane for fuel cells. Herein, we report the synthesis of a novel tetradentate aromatic phosphonate ligand H8L (L=tetraphenylethylene tetraphosphonic acid) based Ni-MOF, whose crystal structure has been solved from single-crystal X-ray diffraction. Ni-MOF [Ni2(H4L)(H2O)9(C2H7SO)(C2H7NCO)] displays a monoclinic crystal structure with a space group of P 21/c, a=11.887 ?, b=34.148 ?, c=11.131 ?, α=γ=90°, β=103.374°, where a nickel-hexahydrate moiety located inside the void space of the framework through several H-bonding interactions. Upon treatment of the Ni-MOF in different pH media as well as solvents, the framework remained unaltered, suggesting the presence of strong H-bonding interactions in the framework. High framework stability of Ni-MOF bearing H-bonding interactions motivated us to explore this metal-organic framework material as proton-conducting medium after external proton doping. Due to the presence of a large number of H-bonding interactions and the presence of water molecules in the framework we have carried out the doping of organic p-toluenesulfonic acid (PTSA) and inorganic sulphuric acid (SA) in this Ni-MOF and observed high proton conductivity of 5.28×10?2 S cm?1 at 90 °C and 98% relative humidity for the SA-doped material. Enhancement of proton conductivity by proton doping under humid conditions suggested a very promising feature of this Ni-MOF.
Stimuli-responsive transmembrane anion transport by AIE-active fluorescent probes
Akhtar, Nasim,Biswas, Oindrila,Manna, Debasis
supporting information, p. 7446 - 7459 (2021/09/08)
Anticancer drug resistance implicates multifunctional mechanisms, and hypoxia is one of the key factors in therapeutic resistance. Hypoxia-specific therapy is considered an extremely effective strategy to fight against cancer. The development of small molecule-based synthetic anion transporters has also recently drawn attention for their potential therapeutic applications against several ion-transport-associated diseases, such as cancer and others. Herein, we describe the development of a hypoxia-responsive proanionophore to trigger controlled transport of anions across membranes under pathogenic conditions. Herein, we report the development of tetraphenylethene (TPE)-based anion transporters. The sulfonium-linkedp-nitrobenzyl containing TPE-based proanionophore could be converted into a lipophilic fluorescent Cl?ion carrier in a hypoxic or reductive environment. Stimuli such as nitroreductase (NTR) and glutathione (GSH) mediated regeneration of the TPE-based active Cl?ion transporter also showed aggregation-induced emission (AIE) properties. We hypothesize that such hypoxia and reductive stimuli activatable proanionophores have tremendous potential to fight against channelopathies, including cancer.
