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13.584 Aktuelle Fachpublikationen zum Thema temperature

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Oxidation-responsive Eu2+/3+-liposomal contrast agent for dual-mode magnetic resonance imaging

21.10.2014 | Levi A. Ekanger; Meser M. Ali; Matthew J. Allen, Chemical Communication, 2014

An oxidation-responsive contrast agent for magnetic resonance imaging was synthesized using Eu2+ and liposomes. Positive contrast enhancement was observed with Eu2+, and chemical exchange saturation transfer was observed before and after oxidation of Eu2+. Orthogonal detection modes render the ...

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Redox-responsive organometallic hydrogels for in-situ metal nanoparticle synthesis

21.10.2014 | Mark A. Hempenius; Bram Zoetebier; G. Julius Vancso, Chemical Communication, 2014

A new class of redox active hydrogels composed of poly(ferrocenylsilane) polyanion and poly(ethylene glycol) chains was assembled, using a copper-free azide-alkyne Huisgen cycloaddition reaction. These organometallic hydrogels displayed reversible collapse and reswelling upon chemical oxidation ...

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One-step synthesis of bismuth molybdate catalysts via flame spray pyrolysis for the selective oxidation of propylene

21.10.2014 | Kirsten Schuh; Wolfgang Kleist; Martin Høj; Vanessa Trouillet; Anker Degn Jensen; Jan-Dierk Grunwaldt, Chemical Communication, 2014

Flame spray pyrolysis (FSP) of Bi(III)- and Mo(VI)-2-ethylhexanoate dissolved in xylene resulted in various nanocrystalline bismuth molybdate phases depending on the Bi/Mo ratio. Besides α-Bi2Mo3O12 and γ-Bi2MoO6, FSP gave direct access to the metastable β-Bi2Mo2O9 phase with high surface area ...

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Green photocatalytic organic transformations by polyoxometalates vs mesoporous TiO2 nanoparticles: Selective aerobic oxidation of alcohols. the article is invited paper for the “Special Issue of 8TH EUROPEAN MEETING ON SOLAR CHEMISTRY AND PHOTOCATALYSIS: ENVIRONMENTAL APPLICATIONS (SPEA 8)”

21.10.2014 | Ioannis Lykakis; Theodoros S Symeonidis; Ioannis Tamiolakis; Gerasimos S Armatas, Photochemical & Photobiological Sciences, 2014

In this study, the catalytic activity of decatungstate (W10O324-) supported on mesoporous TiO2 assemblies (DT-MTA) was compared with that of homogeneous [Bu4N]4W10O32 catalysts under mild conditions. Our experiments showed that both catalytic systems achieve exceptionally high activity and ...

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Oxidation of tetrahydrofuran to butyrolactone catalyzed by iron-containing clay

21.10.2014 | Artit Ausavasukhi; Tawan Sooknoi, Green Chemistry, 2014

Thermally treated iron-containing clay was used as a greener oxidation catalyst for the conversion of tetrahydrofuran (THF) to butyrolactone (BTL). Mild liquid phase reactions were tested at 50–66 °C using hydrogen peroxide (H2O2) as an oxidizing agent. XRD, TGA, ESR, DR-UV, and FTIR revealed the ...

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Effects of electron charge density and particle size of alkali metal titanate nanotube-supported Pt photocatalysts on production of H2 from neat alcohol

21.10.2014 | Chiu-Hsun Lin; Jiunn-Hsing Chao; Wei-Je Tsai; Meng-Jou He; Ting-Ju Chiang, Physical Chemistry Chemical Physics, 2014

Pt nanoparticles (PtNPs) in the range of 1.0–3.0 nm were deposited on alkali titanate nanotubes (MTNTs = M2−xHxTi3O7, M = Li+, Na+, K+ and Cs+) by wet impregnation. While most of the physical properties of Pt/MTNTs remained almost constant, the oxidation state and size of PtNPs varied ...

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Sulfonamide-Substituted Iron Phthalocyanine: Design, Solubility Range, Stability and Oxidation of Olefins

21.10.2014 | Ümit İşci; Celal Caner; Yunus Zorlu; Ayse Gul Gurek; Fabienne Dumoulin; Vefa Ahsen, Dalton Transactions, 2014

4-tert-butylbenzenesulfonamide was used as a substituent of tetra peripherally substituted Fe(II) phthalocyanine, taking in account several parameters crucial for the design of potential oxidation catalysts: solubility and stability. The resulting phthalocyanine exhibits a remarkable stability in ...

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Harnessing the Oxidation Susceptibility of Deubiquitinases for Inhibition with Small Molecules

20.10.2014 | Shimrit Ohayon, Maya Refua, Adi Hendler, Amir Aharoni, Ashraf Brik, Angewandte Chemie, 2014

Abstract Deubiquitinases (DUBs) counteract ubiquitination by removing or trimming ubiquitin chains to alter the signal. Their diverse role in biological processes and involvement in diseases have recently attracted great interest with regard to their mechanism and inhibition. It has been shown ...

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Lanthanides and Actinides: Annual Survey of their Organometallic Chemistry Covering the Year 2013

19.10.2014 | Author(s): Frank T. Edelmann, Coordination Chemistry Reviews, 2014

Publication date: Available online 14 October 2014 Source:Coordination Chemistry Reviews Author(s): Frank T. Edelmann This review summarizes the progress in organo-f-element chemistry during the year 2013. The year 2013 witnessed a significant increase of contributions in the fields of ...

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Redox polymer with N,N‐dichlorosulfonamide functional groups as arsenite oxidant in aqueous solutions

18.10.2014 | Daniel Ociński, Ewa Stanisławska, Elżbieta Kociołek‐Balawejder, Journal of Applied Polymer Science, 2014

ABSTRACT A macroporous, styrene‐divinylbenzene polymer with N,N‐dichlorosulfonamide functional groups (SO2NCl2), containing two chlorine atoms with oxidation number +1, have been prepared through the chemical modification of a commercial sulfonic cation exchanger (Amberlyst 15, Rohm and ...

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