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730 Aktuelle Fachpublikationen zum Thema temperature

mit folgenden Suchkriterien:

Stabilization of the Low‐Spin State in a Mononuclear Iron(II) Complex and High‐Temperature Cooperative Spin Crossover Mediated by Hydrogen Bonding

18.11.2015 | Sipeng Zheng, Niels R. M. Reintjens, Maxime A. Siegler, Olivier Roubeau, Elisabeth Bouwman, Andrii Rudavskyi, Remco ..., Chemistry - A European Journal, 2015

Abstract The tetrapyridyl ligand bbpya (bbpya=N,N‐bis(2,2′‐bipyrid‐6‐yl)amine) and its mononuclear coordination compound [Fe(bbpya)(NCS)2] (1) were prepared. According to magnetic susceptibility, differential scanning calorimetry fitted to Sorai’s domain model, and powder X‐ray diffraction ...


Heterometallic FeIII/K Coordination Polymer with a Wide Thermal Hysteretic Spin Transition at Room Temperature

13.11.2015 | Soonchul Kang, Yoshihito Shiota, Akira Kariyazaki, Shinji Kanegawa, Kazunari Yoshizawa, Osamu Sato, Chemistry - A European Journal, 2015

Abstract The anionic FeIII complex exhibiting cooperative spin transition with a wide thermal hysteresis near room temperature, K[Fe(5‐Brthsa)2] (5‐Brthsa‐H2=5‐bromosalicylaldehyde thiosemicarbazone), is reported. The hysteresis (Δ=69 K in the first cycle) shows a one‐step transition in ...


Confined Polymerization in Highly Ordered Mesoporous Organosilicas

12.11.2015 | Angiolina Comotti, Silvia Bracco, Mario Beretta, Jacopo Perego, Mauro Gemmi, Piero Sozzani, Chemistry - A European Journal, 2015

Abstract Hybrid mesoporous organosilica exhibiting crystal‐like order in the walls provided an ideal channel reaction vessel for the confined polymerization of acrylonitrile (PAN). The resulting high‐molecular‐mass PAN fills the channels at high yield and forms an ordered nanostructure of ...


DNA Triplexes That Bind Several Cofactor Molecules

12.11.2015 | Sven Vollmer, Clemens Richert, Chemistry - A European Journal, 2015

Abstract Cofactors are critical for energy‐consuming processes in the cell. Harnessing such processes for practical applications requires control over the concentration of cofactors. We have recently shown that DNA triplex motifs with a designed binding site can be used to capture and release ...


Frustrated Lewis Pair Chemistry Derived from Bulky Allenyl and Propargyl Phosphanes

11.11.2015 | Christoph Rosorius, Jennifer Möricke, Birgit Wibbeling, Alison C. McQuilken, Timothy H. Warren, Constantin G. Danili ..., Chemistry - A European Journal, 2015

Abstract The dimesitylpropargylphosphanes mes2PCH2CCR 6 a (R=H), 6 b (R=CH3), 6 c (R=SiMe3) and the allene mes2PC(CH3)CCH2 (8) were reacted with Piers’ borane, HB(C6F5)2. Compound 6 a gave mes2PCH2CHCH(B(C6F5)2] (9 a). In contrast, addition of HB(C6F5)2 to 6 b and 6 c gave mixtures of ...


Ionic Self‐Assembly and Red‐Phosphorescence Properties of a Charged Platinum(II) 8‐Quinolinol Complex Associated with Ammonium‐Based Amphiphiles

10.11.2015 | Franck Camerel, Antoine Vacher, Olivier Jeannin, Joaquín Barberá, Marc Fourmigué, Chemistry - A European Journal, 2015

Abstract A series of ionic associates based on the platinum(II) chelate of 5‐sulfo‐8‐quinolinol, [Pt(qS)2]2−, and ammonium‐based amphiphiles is described. At variance with the prototypical neutral complex Pt(q)2 (q=8‐quinolinol), these dianionic fluorophores, functionalized at the periphery ...


Single‐Electron Transmetalation: Synthesis of 1,1‐Diaryl‐2,2,2‐trifluoroethanes via Photoredox/Nickel Dual Catalytic Cross‐Coupling

09.11.2015 | Gary Molander, Da Weon Ryu, David Neal Primer, John C Tellis, Chemistry - A European Journal, 2015

Novel methods for the incorporation of fluorinated subunits into organic frameworks are important in pharmaceutical, agrochemical, and materials science applications. Herein, the first method for the cross‐coupling of benzylic α‐trifluoromethylated alkylboron reagents with (hetero)aryl bromides ...


On the Triple Role of Fluoride Ions in Palladium‐Catalyzed Stille Reactions

09.11.2015 | Marius Hervé, Guillaume Lefèvre, Emily A. Mitchell, Bert U. W. Maes, Anny Jutand, Chemistry - A European Journal, 2015

Abstract The mechanism of Stille reactions (cross‐coupling of ArX with Ar′SnnBu3) performed in the presence of fluoride ions is established. A triple role for fluoride ions is identified from kinetic data on the rate of the reactions of trans‐[ArPdBr(PPh3)2] (Ar=Ph, p‐(CN)C6H4) with Ar′SnBu3 ...


Anhydrous Amorphous Calcium Oxalate Nanoparticles from Ionic Liquids: Stable Crystallization Intermediates of the Formation of Whewellite

09.11.2015 | Aaron Gehl, Mihail Mondeshki, Sven Bach, Tobias Häger, Martin Panthöfer, Bastian Barton, Ute Kolb, Wolfgang Tremel, Chemistry - A European Journal, 2015

Abstract The mechanisms by which amorphous intermediates transform into crystalline materials are not well understood. To test the viability and the limits of the classical crystallization, new model systems for crystallization are needed. With a view to elucidating the formation of an ...


Entropy‐Driven 1,2‐Type Friedel–Crafts Reaction of Phenols with N‐tert‐Butoxycarbonyl Aldimines

06.11.2015 | Masaru Kato, Shogo Hirao, Katsuhiro Nakano, Makoto Sato, Masahiro Yamanaka, Yoshihiro Sohtome, Kazuo Nagasawa, Chemistry - A European Journal, 2015

Abstract Differential activation entropy (ΔΔS≠) is revisited as an important parameter that governs catalytic stereodiscrimination processes by investigating temperature effects on the basis of the Eyring theory. However, correlating the ΔΔS≠ effect and the molecular structure of the ...


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