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3.143 Aktuelle Fachpublikationen zum Thema temperature

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Catalytic hydrogen production from paraformaldehyde and water using an organoiridium complex

28.02.2015 | Tomoyoshi Suenobu; Yusuke Isaka; Satoshi Shibata; Shunichi Fukuzumi, Chemical Communication, 2015

Paraformaldehyde was decomposed using an organoiridium complex (1, [IrIII(Cp*)(4-(1H-pyrazol-1-yl-κN2)benzoic acid-κC3)(H2O)]2SO4) as a catalyst in water to produce H2 and CO2 in a 2 [ ] : [ ] 1 molar ratio at room temperature. The catalytic cycle is composed of the reduction of 1 by ...

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A new hypercrosslinked supermicroporous polymer, scope for sulfonation and its catalytic potential for the efficient synthesis of biodiesel at room temperature

26.02.2015 | Subhajit Bhunia; Biplab Banerjee; Asim Bhaumik, Chemical Communication, 2015

We have designed a new hypercrosslinked supermicroporous polymer (HMP-1) having BET surface area of 913 m2g-1 by FeCl3 catalyzed Friedel-Crafts alkylation reaction between carbazole and α,α′-Dibromo-p-xylene and upon sulfonation HMP-1 yielded a very efficient solid acid catalyst for the ...

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Poly (azo-ester)s: Interfacial Synthesis of Optically Active Polymers

25.02.2015 | Zahmatkesh, Saeed; Dindarlooiyan, Nasser, Letters in Organic Chemistry, 2015

Abstract: (2S)-5-(3-Methyl-2-phthalimidylpentanoylamino)isophthalic acid (1), (2S)-5-(2-Phthalimidiylpropanoylamino) isophthalic acid, and (2S)-5-(3-phenyl-2-phthalimidylpropanoylamino)isophthalic acid were prepared from phthalic anhydride, 5-aminoisophthalic acid and the corresponding ...

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1,3,5-Triazine-Pentaethylenehexamine Polymer for the Adsorption of Palladium (II) from chloride-containing solutions

22.02.2015 | Author(s): Merve Sayın , Mustafa Can , Mustafa İmamoğlu , Mustafa Arslan, Reactive and Functional Polymers, 2015

Publication date: Available online 17 February 2015 Source:Reactive and Functional Polymers Author(s): Merve Sayın , Mustafa Can , Mustafa İmamoğlu , Mustafa Arslan A triazine-hexamine (TAPEHA) polymer demonstratıng high acid-resistance, good affinity to noble metals, and a high density ...

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Poly(ether‐imide) and related sepiolite nanocomposites: investigation of physical, thermal, and mechanical properties

20.02.2015 | Zahra Tabatabaei‐Yazdi, Shahram Mehdipour‐Ataei, Polymers for Advanced Technologies, 2015

Novel poly(ether‐imide) and sepiolite nanocomposites were synthesized based on a unique diamine monomer with the aim of improving physical and mechanical properties of final polyimide films. The diamine was polycondensed with 4,4′‐(hexafluoroisopropylidene) diphthalic anhydride to produce ...

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Xylose Isomerization with Zeolites in a Two‐Step Alcohol–Water Process

20.02.2015 | Marta Paniagua, Shunmugavel Saravanamurugan, Mayra Melian‐Rodriguez, Juan A. Melero, Anders Riisager, ChemSusChem, 2015

Abstract Isomerization of xylose to xylulose was efficiently catalyzed by large‐pore zeolites in a two‐step methanol–water process that enhanced the product yield significantly. The reaction pathway involves xylose isomerization to xylulose, which, in part, subsequently reacts with methanol to ...

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Influence of roasting conditions on health-related compounds in different nuts

19.02.2015 | Author(s): W. Schlörmann , M. Birringer , V. Böhm , K. Löber , G. Jahreis , S. Lorkowski , A.K. Müller , F. ..., Food Chemistry, 2015

Publication date: 1 August 2015 Source:Food Chemistry, Volume 180 Author(s): W. Schlörmann , M. Birringer , V. Böhm , K. Löber , G. Jahreis , S. Lorkowski , A.K. Müller , F. Schöne , M. Glei Due to their health-beneficial ingredients the consumption of nuts can contribute to a ...

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Trihaloisocyanuric Acids as Atom‐Economic Reagents for Halogenation of Aromatics and Carbonyl Compounds in the Solid State by Ball Milling

19.02.2015 | Abhaya K. Mishra, Honnappa Nagarajaiah, Jarugu Narasimha Moorthy, European Journal of Organic Chemistry, 2015

Abstract It is shown that both tribromoisocyanuric acid (TBCA) and trichloroisocyanuric acid (TCCA) are excellent reagents for direct halogenation of electron‐rich aromatics under solvent‐free, ball‐milling conditions. The results are remarkable in light of the fact that chlorination of ...

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Comparison of RAFT Ab Initio Emulsion Polymerization of Methyl Methacrylate and Styrene Mediated by Oligo(methacrylic acid‐b‐methyl methacrylate) Trithiocarbonate Surfactant

19.02.2015 | Yue Zhu, Shangyu Bi, Xiang Gao, Yingwu Luo, Macromolecular Reaction Engineering, 2015

The comparison between methyl methacrylate (MMA) and styrene (St) RAFT emulsion polymerization using oligo(methacrylic acid41‐b‐methyl methacrylate8) RAFT agent (oligo(MAA41‐b‐MMA8) RAFT) as surfactant is investigated in order to gain a better understanding on RAFT emulsion polymerization of ...

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Enantioselective Synthesis of exo-4-Nitroprolinates from Nitro­alkenes and Azomethine Ylides Catalyzed by Chiral Phosphor­amidite·Silver(I) or Copper(II) Complexes

19.02.2015 | Luis M. Castelló; Carmen Nájera; José M. Sansano; Olatz Larrañaga; Abel de Cózar; Fernando P. Cossío, Synthesis, 2015

SynthesisDOI: 10.1055/s-0034-1380158 Chiral complexes formed by privileged phosphoramidites derived from chiral binol and optically pure Davies’ amines, and copper(II) triflate, silver(I) triflate or silver(I) benzoate are excellent catalysts for the general 1,3-dipolar cycloaddition between ...

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