54523-24-9Relevant academic research and scientific papers
Galactose Grafted Two-Dimensional Nanosheets as a Scaffold for the In Situ Synthesis of Silver Nanoparticles: A Potential Catalyst for the Reduction of Nitroaromatics
Harikrishnan, Kaloor S.,Krishnan, Nithiyanandan,Kumar, Nilima Manoj,Krishna, Anusree,Raj, Gowtham,Perumal, Devanathan,Kalathil, Jemshiya,Krishna, Jithu,Varghese, Reji
supporting information, p. 14100 - 14107 (2021/09/06)
Two major hurdles in NP-based catalysis are the aggregation of the NPs and their recycling. Immobilization of NPs onto a 2D support is the most promising strategy to overcome these difficulties. Herein, amphiphilicity-driven self-assembly of galactose-hexaphenylbenzene-based amphiphiles into galactose-decorated 2D nanosheet is reported. The extremely dense decoration of reducing sugar on the surface of the sheets is used for the in situ synthesis and immobilization of ultrafine catalytically active AgNPs by using Tollens’ reaction. The potential of the system as a catalyst for the reduction of various nitroaromatics is demonstrated. Enhanced catalytic activity is observed for the immobilized AgNPs when compared to the corresponding discrete AgNPs. Recovery of the catalytic system from the reaction mixture by ultrafiltration and its subsequent recycling for several cycles without dropping its activity is shown. This is the first report demonstrating the in situ synthesis and immobilization of ultrafine AgNPs onto a 2D nanosheet that exhibits excellent catalytic performance for the reduction of nitroaromatics.
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Paragraph 0182; 0185-0188, (2018/02/10)
wherein R1, R3, R4 and R6 are independently from each other chosen among a carboxylic (—COOH) group, a cyano (—C≡N) group, an isocyano (—N+≡C?) group, a cyanate (—O—C≡N) group and a —F group, and R2 and R5 are, independently from each other, chosen among
Superbenzene-bridged bis(permethyl-β-cyclodextrin) as a convenient and effective probe for trinitrophenol exploder
Yu, Jie,Chen, Yong,Li, Jing-Jing,Liu, Yu
supporting information, p. 799 - 802 (2017/02/05)
A novel planar C2 symmetrical superbenzene-bridged bis(permethyl-β-CD) was synthesized by grafting two permethyl-β-CD units onto a coronene core. Its self-assembly and luminescent behaviors could be smartly controlled by adjusting the polarity
Direct synthesis of polyaromatic chains of tribenzopentaphene copolymers through cyclodehydrogenation of their poly-tetraphenylbenzene precursors
Alameddine, Bassam,Sobhana Anju, Rajamohanan,Shetty, Suchetha,Baig, Noorullah,Al-Mousawi, Saleh,Al-Sagheer, Fakhreia
, p. 3565 - 3572 (2017/09/06)
Three polyaromatic-based polymers are reported to contain co-monomers of trapezoidal tribenzopentaphene (TBP) polycyclic aromatic hydrocarbons. The synthetic strategy consists of initially making highly soluble tetraphenylbenzene copolymers 4a–c, followed
Racemisation of 1-arylethylamines with Shvo-type organoruthenium catalysts
Apps, James F. S.,Livingston, Andrew G.,Parrett, Mark R.,Pounder, Ryan J.,Taylor, Paul C.,Turner, Andrew R.
, p. 1391 - 1394 (2014/06/23)
Variation of the electronic nature of the tetraphenylcyclopentadienone ligand in organoruthenium complexes influences their utility for racemisation of model chiral amines. Our study highlights the need to balance reactivity and selectivity in the design of racemisation catalysts. Electron-poor Shvo-type catalysts are, at first sight, more effective for racemisation, but yield more by-product; electron-rich complexes are less proficient at racemisation, but lead to less by-product.
Synthesis and proton conductivity of sulfonated, multi-phenylated poly(arylene ether)s
Lee, Hsu-Feng,Wang, Po-Hsun,Huang, Yi-Chiang,Su, Wen-Hung,Gopal, Ram,Lee, Chun Che,Holdcroft, Steven,Huang, Wen-Yao
, p. 2579 - 2587 (2014/08/18)
A series of sterically-encumbered, sulfonated, poly(arylene ether) copolymers were synthesized and their proton conductivity examined. The series was prepared by copolymerizing a novel monomer, 2″,3″,5″, 6″-tetraphenyl-[1,1′:4',1″:4″,1″':4″', 1″″-quinquephenyl]-4,4″″-diol, with 4,4'- difluorobenzophenone and bisphenol A. Subsequent sulfonation and solution casting provided membranes possessing ion exchange capacities of 1.9 to 2.7 mmol/g and excellent mechanical properties (Young's modulus, 0.2-1.2 GPa; tensile strength, 35-70 MPa; elongation at break, 62-231%). Water uptake ranged from 34 to 98 wt% at 80 °C/100% RH. Proton conductivities ranged between 0.24 to 16 mS/cm at 80 °C/60% RH, and 3 to 167 mS/cm at 80 °C/95% RH. TEM analysis of the polymers, in the dehydrated state, revealed isolated spherical aggregates of ions, which presumably coalesce when hydrated to provide highly conductive pathways. The strategy of using highly-encumbered polymer frameworks for the design of mechanically-robust and dimensionally-stable proton conducting membranes is demonstrated. 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 2579-2587 Sulfonated, multiphenylated, random copolymers of poly(arylene ether)s were synthesized for examination as proton-conducting membranes. Proton conductivities ranged from 3 to 167 mS/cm at 80 °C/95% RH. The highly-encumbered polymer framework conferred exceptional mechanical strength and dimensional stability. Copyright
An efficient synthesis of heptaaryldipyrromethenes from tetraarylcyclopentadienones and ammonium acetate and their extension to the corresponding BODIPYs
Li, Jichao,Hu, Binbin,Hu, Gongfang,Li, Xihui,Lu, Ping,Wang, Yanguang
, p. 8848 - 8859 (2013/01/15)
Heptaaryldipyrromethenes are efficiently prepared from ammonium acetate and tetraarylcyclopentadienones in a one-pot cascade process and can be converted into heptaaryl BODIPYs with fluorescent response to environmental acidity.
Synthesis of electron-poor hexa-peri-hexabenzocoronenes
Jones, David J.,Purushothaman, Balaji,Ji, Shaomin,Holmes, Andrew B.,Wong, Wallace W. H.
supporting information; scheme or table, p. 8066 - 8068 (2012/09/22)
The oxidative cyclodehydrogenation of electron-poor arenes was achieved using DDQ-CF3SO3H resulting in hexa-peri- hexabenzocoronenes with electron withdrawing Br, F and CF3 groups. This method will lead to their expansion into a new class of electron transport materials.
Efficient synthesis of substituted polyarylphthalimides via cycloaddition of cyclopentadienones with 2-bromomaleimide
Vanel, Rémi,Berthiol, Florian,Bessières, Bernard,Einhorn, Cathy,Einhorn, Jacques
supporting information; experimental part, p. 1293 - 1295 (2011/07/07)
Functionalized tetraarylphthalimides or diarylphthalimides fused with an acenaphthene moiety have been prepared in one step from 2-bromomaleimide and tetraarylcyclopentadienones (tetracyclones) or 7,9-diaryl-8H- cyclopentacenaphthylene-8-ones (acecyclones
Predicting the UV-vis spectra of tetraarylcyclopentadienones: Using DFT molecular orbital energies to model electronic transitions of organic materials
Potter, Robert G.,Hughes, Thomas S.
, p. 2995 - 3004 (2008/09/19)
(Chemical Equation Presented) Tetraphenylcyclopentadienone, due to its intrinsically low HOMO-LUMO gap, has been suggested as a valuable repeat unit in conducting polymers for nanoscale electronics. The HOMO and LUMO of tetraphenylcyclopentadienone appear
